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Home My WebLink AboutWPO201800007 VSMP - SWPPP 2019-05-09A COUNTY OF ALBEMARLE ty Department of Community Development 401 McIntire Road, North Wing Charlottesville, Virginia 22902-4596 Tel. (434) 296-5832 • Fax (434) 972-4126 Stormwater Pollution Prevention Plan (SWPPP) For Construction Activities At: Project Name: Rivanna Village — Amendment 1 and Phase II Address: Rivanna Investment Holdings LLC c/o Robinson Development Group 477 Viking Drive, Suite 405 Virginia Beach, VA 23452 Prepared by: Name: Blossom Consulting and Engineering Inc. (BCE) Prepared for: Name: Rivanna Investment Holdings LLC SWPPP Preparation Date: November 18, 2017 Revision 3/2/2018 REVISION 4/16/2018 (This document is to be made publicly available according to 9VAC25-880-70, Part II, section D) APPROVED by the Albemarle County Community Development Department Date 5/9/2018 File WP02018-00007 Issued — 10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County CONTENTS: (from Albemarle County Code See. 17-405) 1. Registration Statement 2. Notice of General Permit Coverage 3. Nature of Activity 4. Erosion and Sediment Control Plan 5. Stormwater Management Plan 6. Pollution Prevention Plan. 7. Discharges to impaired waters, surface waters within an applicable TMDL wasteload allocation, and exceptional waters 8. Qualified Personnel 9. Signed Certification 10. Delegation of Authority 11. General Permit Copy 12. Inspection Logs APPENDICES: Appendix A Log of Changes and Updates to SWPPP Appendix B Grading and Stabilization Activities Log Appendix C Maintenance Agreements for Stormwater Management Facilities Appendix D Spill Report Form Appendix E Corrective Action Log Appendix F Contractor/Subcontractor Certifications/Agreements Appendix G Additional Supporting Information Issued — 10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County Section 1. Registration Statement (Provide a signed completed copy of the DEQ registration statement) A signed completed copy of the DEQ registration statement will be provided in Section 1 of this SWPPP. Issued — 10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County Registration Statement General VPDES Permit for Discharges of Stormwater from Construction Activities (VAR10) (Please Type or Print All Information) 1. Construction Activity Operator: (General permit coverage will be issued to this operator. The Cerfficafion in Item #12 must be signed by the appropriate person associated with this operator.) Name: RIVANNA INVESTMENT HOLDINGS LLC. CIO ROBINSON DEVELOPMENT GROUP Contact: MR. TIM CULPEPPER Mailing Address: 150 W. MAIN STREET, SUITE 1100 City: NORFOLK nth: VA Zip; 23510 Phone: 757 282-1010 Email acidness (if available): TCULPEPPER@ROBINSONDEVELOPMENT.COM Indicate if DEQ may transmit general permit correspondence electronically: Yes ❑X No ❑ 2. Existing General Permit Registration Number (for renewals only): 3. Name and Location of the Construction Activity: Wilma. RIVANNA VILLAGE: PHASE II Address (if available): City: CHARLOTTESVILLE State: VA Zip: County (if not located within a City): ALBEMARLE COUNTY Latitude (decimal degrees): 38.005763 N Longitude (decimal degrees). 78.37E10 W Name and Location of all Off -site Support Activities to be covered under the general penult: Name: NIA Address (if available); City: Zip: County (if not located within a City):_ Latitude (decimal degrees): Longitude (decimal degrees): 4. Status of the Construction Activity (check only one): Federal ❑ State ❑ Public ❑ Private ❑X 5. Nature of the Construction Activity (e.g., commercial, Industrial, residential, agricultural, oil and gas, etc,): RESIDENTIAL AND COMMERCIAL 6. Name of the Receiving Waters) and Hydrologic Unit Code (HUC): Name: UINNAMED TRIBUTARY TO CARROL CREEK Name: HUC: JR171 H29 HUC: T. If the discharge Is through a Municipal Separate Storm Sewer System (MS4), the name of the MS4 operator: ALBEMARLE COUNTY 8. Estimated Project Start and Completion Date: Start Date (mmlddlyyyy): 312018 Completion Date (mmiddlyyyy): 312020 9. Total Land Area of Development (to the nearest one -hundredth acre): 90.61 ACRES Estimated Area to be Disturbed (to the nearest one -hundredth acre): 58.33 ACRES 10. Is the area to be disturbed part of a larger common plan of development or sale? Yes X❑ No ❑ 11. A stormwater pollution prevention plan (SWPPP) must be prepared In accordance with the requirements of the General VPDES Permit for Discharges of Stonmwater from Construction Activities prior to submitting this Registration Statement. By signing this Registration Statement the operator Is certifying that the SWPPP has been prepared. 12. Certification: "I certify under penalty of law that I have read and understand this Registration Statement and that this document and all attachments were prepared in accordance with a system designed to assure that qualified personnel properly gathered and evaluated the information submitted. Based on my inquiry of the person or persons who manage the system or those persons directly responsible for gathering the Information, the information submitted is to the best of my knowledge and belief true, accurate, and complete. I am aware that there are significant penalties for submitting false information including the possibility of fine and imprisonment for knowing violations" Printed Nam Tftle: f",,410-,- Signature: Date: 3 (Please sign In NK. Ar e i tion ust tVaigned by the appropriate person associated with the operator identified in Item #1.) 0712014 Page 1 of 1 Instructions for Completing the Registration Statement General VPDES Permit for Discharges of Stormwater from Construction Activities (VAR10) GENERAL A. Coverage Under this General Permit. Any operator applying for coverage under this general permit who is required to submit a Registration Statement (see Section B below) must submit a complete Registration Statement to the Department. The Registration Statement serves as a Notice of Intent for coverage under the General VPDES Permit for Discharges of Stormwater from Construction Activities (VAR10). B. Single-family Detached Residential Structures. Operators with an existing stormwater discharge or proposing a new stormwater discharge associated with the construction of a single- family detached residential structure are not required to submit a Registration Statement or the Department of Environmental Quality (DEQ) portion of the general permit fee. Operators of these types of discharges are authorized to discharge under this general permit immediately upon the general permit's effective date of July 1, 2014. C. To Apply for Permit Coverage. 1. New Construction Activities. Any operator proposing a new stormwater discharge from construction activities shall submit a complete Registration Statement to the Department prior to the commencement of land disturbance, unless exempted by Section B above. Any operator proposing a new stormwater discharge from construction activities in response to a public emergency where the related work requires immediate authorization to avoid imminent endangerment to human health or the environment is immediately authorized to discharge under this general permit and must submit a complete Registration Statement to the Department no later than 30 days after commencing land disturbance; documentation to substantiate the occurrence of the public emergency must accompany the Registration Statement. 2. Existing Construction Activities. Any operator that was authorized to discharge under the general permit issued in 2009, and who intends to continue coverage under this general permit, shall submit a complete Registration Statement to the Department on or before June 1, 2014, unless exempted by Section B above. D. Where to Submit Registration Statements. All Registration Statements should be submitted to: Department of Environmental Quality Office of Stormwater Management, 10th Floor P.O. Box 1105 Richmond, VA 23218 LINE -BY-LINE INSTRUCTIONS Item 1: Construction Activity Operator Information. "Operator" means the owner or operator of any facility or activity subject to the Stormwater Management Act and regulations. In the context of stormwater associated with a large or small construction activity, operator means any person associated with a construction project that meets either of the following two criteria: (i) the person has direct operational control over construction plans and specifications, including the ability to make modifications to those plans and specifications or (ii) the person has day-to-day operational control of those activities at a project that are necessary to ensure compliance with a stormwater pollution prevention plan for the site or other state permit or VSMP authority permit conditions (i.e., they are authorized to direct workers at a site to carry out activities required by the stormwater pollution prevention plan or comply with other permit conditions). The entities that are considered operators will commonly consist of the owner or developer of a project (the party with control of project plans and specifications) or the general contractor (the party with day to day operational control of the activities at the project site which are necessary to ensure compliance with the general permit). Provide the legal name (do not use a colloquial name), contact, mailing address, telephone number, and email address (if available) of the construction activity operator; general permit coverage will be issued to this operator. Indicate if the Department may transmit general permit correspondence electronically. Item 2: Existing General Permit Registration Number. For reapplications only, provide the existing general permit registration number for the construction activity. This item does not need to be completed for new construction activities applying for general permit coverage. Item 3: Name and Location of the Construction Activity Information. Provide the official name, street address (if available), city or county (if not located within a City) of the construction activity. Also, provide the latitude and longitude in decimal degrees of the approximate center of the construction activity (e.g., N 37.5000, W 77.5000). Name and Location of Off -site Support Activity Information. This general permit also authorizes stormwater discharges from support activities (e.g., concrete or asphalt batch plants, equipment staging yards, material storage areas, excavated material disposal areas, borrow areas) located on -site or off -site provided that (i) the support activity is directly related to a construction activity that is required to have general permit coverage; (ii) the support activity is not a commercial operation, nor does it serve multiple unrelated construction activities by different operators; (iii) the support activity does not operate beyond the completion of the construction activity it supports; (iv) the support activity is identified in the registration statement at the time of general permit coverage; (v) appropriate control measures are identified in a SWPPP and implemented to address the discharges from the support activity areas; and (vi) all applicable state, federal, and local approvals are obtained for the support activity. Provide the official name, street address (if available), City and County (if not located within a City) of all off -site support activities to be covered under this general permit. Also, provide the latitude and longitude in decimal degrees of the approximate center of the off -site support activities (e.g., N 37.5000, W 77.5000). Also, if an off -site support activity is going to be covered under this general permit the total land area of the off -site support activity and the estimated area to be disturbed by the off -site support activity need to be included in Item #9. Item 4: Status of the Construction Activity. Indicate the appropriate status (Federal, State, Public, or Private) of the construction activity. Item 5: Nature of the Construction Activity. Provide a brief description of the construction activity, such as commercial, residential, agricultural, oil and gas, etc. This list is not all inclusive. Item 6: Receiving Waters(s) and HUC Information. Provide the name of the receiving water(s) and corresponding HUC for all stormwater discharges including any stormwater discharges from off -site support activities to be covered under this general permit. Hydrologic Unit Code or HUC is a watershed unit established in the most recent version of Virginia's 6th order national watershed boundary dataset. 07/2014 Page 1 of 2 Item 7: MS4 Information If stormwater is discharged through a municipal separate storm sewer system (MS4), provide the name of the MS4 operator. The name of the MS4 operator is generally the Town, City, County, Institute or Federal facility where the construction activity is located. Item 8: Construction Activity Start and Completion Date Information. Provide the estimated start date (month/day/year) of the construction activity. Provide the estimated completion date (month/day/year) of the construction activity. Item 9: Construction Activity Area Information. Provide the total area (to the nearest one -hundredth acre) of the development (i.e.., the total acreage of the larger common plan of development or sale). Include the total acreage of any off -site support activity to be covered under this general permit. Provide the estimated area (to the nearest one -hundredth acre) to be disturbed by the construction activity. Include the estimated area of land disturbance that will occur at any off -site support activity to be covered under this general permit. Item 10: Common Plan of Development or Sale Information. Indicate if the area to be disturbed by the construction activity is part of a larger common plan of development or sale. Larger common plan of development or sale is defined as a contiguous area where separate and distinct construction may be taking place at different times on different schedules. Plan is broadly defined as any announcement or documentation, including a sign, public notice or hearing, sales pitch, advertisement, drawing, permit application, zoning request, etc., or physical demarcation such as boundary signs, lot stakes, or surveyor markings indicating that construction activities may occur. Item 11: Stormwater Pollution Prevention Plan (SWPPP). A Stormwater Pollution Prevention Plan (SWPPP) must be prepared in accordance with the requirements of the General VPDES Permit for Discharges of Stormwater from Construction Activities (VAR10) prior to submitting this Registration Statement. By signing this Registration Statement the operator is certifying that the SWPPP has been prepared. Item 12: Certification. A properly authorized individual associated with the operator identified in Item 1 of the Registration Statement is responsible for certifying and signing the Registration Statement. Please sign the Registration Statement in INK. State statutes provide for severe penalties for submitting false information on the Registration Statement. State regulations require that the Registration Statement be signed as follows: a. For a corporation: by a responsible corporate officer. For the purpose of this part, a responsible corporate officer means: (i) A president, secretary, treasurer, or vice-president of the corporation in charge of a principal business function, or any other person who performs similar policy -making or decision -making functions for the corporation, or (ii) the manager of one or more manufacturing, production, or operating facilities, provided the manager is authorized to make management decisions that govern the operation of the regulated facility including having the explicit or implicit duty of making major capital investment recommendations, and initiating and directing other comprehensive measures to assure long-term compliance with environmental laws and regulations; the manager can ensure that the necessary systems are established or actions taken to gather complete and accurate information for permit application requirements; and where authority to sign documents has been assigned or delegated to the manager in accordance with corporate procedures. b. For a partnership or sole proprietorship: by a general partner or the proprietor, respectively. c. For a municipality, state, federal, or other public agency: by either a principal executive officer or ranking elected official. For purposes of this part, a principal executive officer of a public agency includes: (i) The chief executive officer of the agency, or (ii) A senior executive officer having responsibility for the overall operations of a principal geographic unit of the agency. 07/2014 Page 2 of 2 Section 2. Notice of General Permit Coverage (This notice is to be posted near the main entrance according to 9VAC25-880-70, Part II, section C.) (Provide a copy of the DEQ coverage letter when obtained) Upon commencement of land disturbance, a copy of the DEQ notice of coverage letter will be posted near the main entrance of the construction activity. Information for public access to the SWPPP (name and telephone number of a contact person for SWPPP availability) shall also be posted and maintained in accordance with Part II C (of the CGP). Operator(s): Rivanna Investment Holdings LLC c/o Mr. Tim Culpepper 477 Viking Drive, Suite 405 Virginia Beach, VA 23452 757-282-1010 tulpeppergrobinsondevelopment. com The operator shall maintain the posted information until termination of general permit coverage as specified in Part I F (of the CGP). The notice of coverage letter and a copy of the notice of termination (NOT) form are provided in Section 2 of this SWPPP. Issued — 10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County Section 3. Nature of Activity (Provide a detailed narrative of the construction activities. Include or reference a construction schedule and sequence. Include any phasing.) Description of Project Stormwater Plans The proposed stormwater plan for Phase 2 of Rivanna Village consists of those measures necessary to manage stormwater runoff from the prepared Phase 2 Development (see site plans submitted by Alan Franklin, P.E.). The stormwater plan also addresses development of a portion of Phase 1 that was previously permitted for disturbance. Specifically, this plan addresses: - Stormwater controls which utilize the E&S practices where applicable to transition temporary erosion and sediment control measures to permanent stormwater controls - Stormwater BMPs designed in accordance with State standards using the Virginia runoff reduction methodology (see stormwater calculations provided on the plans) The plan is designed to allow for installation of proposed linear infrastructure and roadways and specifies measures that will manage runoff from developed areas. Proposed stormwater practices include: - Upland BMPs including biofiltration cells and associated swales - Wet swales designed according to State standards and located in close proximity to existing wetland features in a similar topographic position - A Level 2 wet pond design, treating the developed areas within Blocks C (Phase 1), D, F, H, and J (Phase 2). Phase 2 areas consist generally of those located on the Southern, Western and eastern portions of the site accessed by Glenmore Way and Route 250. Traffic management practices are proposed under separate cover and shall be implemented in coordination with the access measures proposed herein. The main level 2 wet pond will be installed with this phase, and there is disturbance proposed in the stream buffer. A buffer mitigation plan is provided in conjunction with the stormwater and erosion and sediment control plans. Phase 2 project area (limits of disturbance) = 68.55 acres± E&S Plans The proposed Erosion and Sediment Control Plan for Phase 2 of Rivanna Village consists of those measures necessary to prevent sediment laden runoff from entering downstream waterways. Specifically, this plan addresses: - Access to the site - Staging and stockpile areas - Construction sequencing Issued — 10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County Onsite erosion and sediment control facilities including perimeter controls, sediment traps, and sediment basins - Stabilization practices to be implemented during construction in a phased manner to treat disturbed areas The plan is designed to specify measures that will provide erosion and sediment control for disturbed areas associated with clearing, grading, and storm drain infrastructure. Proposed erosion and sediment control measures include: 1. Minimization of site disturbance to preserve stream buffers and riparian corridors. 2. Phased construction practices with stabilized construction entrances and construction road stabilization. 3. Perimeter controls including tree protection, diversions, swales, and silt fence. 4. Combination of sediment traps and basins used in coordination with diversions and swales. 5. Temporary and permanent stabilization of slopes and graded areas. Phase 2 areas consist generally of those located on the southern, western and eastern portions of the site accessed by Glenmore Way and Route 250. Traffic management practices are proposed under separate cover and shall be implemented in coordination with the access measures proposed herein. The main level 2 wet pond will be installed with this phase, and there is disturbance proposed in the stream buffer. A buffer mitigation plan is provided in conjunction with the stormwater and erosion and sediment control plans. A general location map showing the location of the project site is provided on the cover page of the plans in Sections 4 and 5 of this SWPPP. Size of Construction Project Total Area of Development = 90.61 (in acres) Estimated Area to be Disturbed = 68.55 (in acres) Project Latitude/Longitude Latitude: 38.005763 ° N (decimal) Longitude: 78.376710 °W (decimal) Sequence of Construction • All erosion and sediment control measures are to be placed prior to or as the first step in clearing. • Erosion and siltation control measures shall be provided in accordance with the approved erosion control plan and shall be installed prior to any clearing, grading or other construction. • The plan approving authority must be notified one week prior to the pre -construction conference, one week prior to the commencement of land disturbing activity, and one week prior to the final inspection. Issued — 10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County • A construction sequence is provided on the plans for the project. The plans are incorporated by reference as part of this SWPPP and are provided in this SWPPP. Information on when major grading activities occur and when construction activities temporarily or permanently ceases on a portion of the site will be provided on the inspection reports for the project (Section 12 of this SWPPP) and/or included in a SWPPP updates section (Appendix A) or on a grading and stabilization activities log (Appendix B). Inspection reports summarizing each inspection shall be retained onsite as part of this SWPPP. Issued — 10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County Section 4. Erosion and Sediment Control Plan (Provide a reduced, I Ix17 copy of the latest Erosion and Sediment Control Plan. Do not reference only). A copy of the Erosion and Sediment Control Plans is provided in Section 4 of this SWPPP. This SWPPP was prepared for submittal concurrent with the erosion and sediment control plans for review by the VSMP Authority. Once approved, the approved erosion and sediment control plan is hereby incorporated by reference as part of this SWPPP. • All erosion and sediment control measures shall be installed and maintained in accordance with the Virginia Erosion and Sediment Control Handbook, Third Edition, 1992. • All control measures must be properly maintained in effective operating condition in accordance with good engineering practices and, where applicable, manufacturer specifications. If a site inspection required by Part II F (of the CGP) identifies a control measure that is not operating effectively, corrective action(s) shall be completed as soon as practicable, but no later than seven days after discovery or a longer period as established by the VSMP authority, to maintain the continued effectiveness of the control measures. • If site inspections required by Part II F (of the CGP) identify an existing control measure that needs to be modified or if an additional control measure is necessary for any reason, implementation shall be completed prior to the next anticipated measurable) storm event. If implementation prior to the next anticipated measurable storm event is impracticable, then alternative control measures shall be implemented as soon as practicable, but no later than seven days after discovery or a longer period as established by the VSMP authority. • Information on required inspections is provided in Sections 7, 8, and 12 of this SWPPP. A properly implemented approved erosion and sediment control plan, "agreement in lieu of a plan," or erosion and sediment control plan prepared in accordance with department -approved annual standards and specifications, that adequately: (1) Controls the volume and velocity of stormwater runoff within the site to minimize soil erosion (MS-11 and MS-19, Environmental Site Design Principles 6 & 7, Std. & Spec. 3.18-3.21); • Sediment basins and traps, perimeter dikes, sediment barriers and other measures intended to trap sediment shall be constructed as a first step in any land disturbing activity and shall be made functional before upslope land disturbance takes place; (2) Controls stormwater discharges, including peak flow rates and total stormwater volume, to minimize erosion at outlets and to minimize downstream channel and stream bank erosion (MS -I I and MS-19, Environmental Site Design Principle 6); 1 Note: Measurable storm event means a rainfall event producing 0.25 inches of rain or greater over 24 hours. Issued — 10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County • Sediment basins and traps, perimeter dikes, sediment barriers and other measures intended to trap sediment shall be constructed as a first step in any land disturbing activity and shall be made functional before upslope land disturbance takes place; (3) Minimizes the amount of soil exposed during the construction activity (MS-1, MS-3 & MS-4, Environmental Site Design Principles 3, 4 & 5); • Stabilization practices to be implemented during control in a phased manner to treat disturbed areas as shown on the plans; (4) Minimizes the disturbance of steep slopes (MS-7, MS-8 & MS-9, Environmental Site Design Principles 3 & 5); • Blanketing and matting is to be provided for steep slopes as shown on the erosion and sediment control plans; (5) Minimizes sediment discharges from the site in a manner that addresses (i) the amount, frequency, intensity, and duration of precipitation; (ii) the nature of resulting stormwater runoff; and (iii) soil characteristics, including the range of soil particle sizes present on the site (19 Minimum Standards, Stds & Specs of the VESCH Chapter 3); Soils information is provided on the erosion and sediment control plans for the project; (6) Provides and maintains natural buffers around surface waters, directs stormwater to vegetated areas to increase sediment removal, and maximizes stormwater infiltration, unless infeasible (Environmental Site Design Principles 4, 5 & 8, Std. & Spec. 3.38); Stream buffer limits to be clearly identified in the field prior to land disturbance with tree protection fencing; • Tree protection will be installed along the stream buffer as shown on the plans; (7) Minimizes soil compaction and, unless infeasible, preserves topsoil (MS-2, Std. & Spec. 3.30, Environmental Site Design Principle 4 & 8); • Areas to remain undisturbed are shown on the plans based on the limits of disturbance; (8) Ensures that stabilization of disturbed areas will be initiated immediately whenever any clearing, grading, excavating, or other land -disturbing activities have permanently ceased on any portion of the site, or temporarily ceased on any portion of the site and will not resume for a period exceeding 14 days (MS-1, MS-3 & MS-18, Stds & Specs 3.28 to 3.38); and Stabilization of disturbed areas will be initiated immediately whenever any clearing, grading, excavating, or other land -disturbing activities have permanently ceased on any portion of the site, or temporarily ceased on any portion of the site and will not resume for a period exceeding 14 days. Immediately means as soon as practicable, but no later than the end of the next business day, following the day when the land -disturbing activities have temporarily or permanently ceased. Immediately is used in the context of the CGP to define the deadline for initiating stabilization measures; Issued — 10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County • As outlined in Part I.B.4.b. of the CGP, permanent or temporary soil stabilization shall be applied to denuded areas within seven days after final grade is reached on any portion of the site; (9)Utilizes outlet structures that withdraw stormwater from the surface (i.e., above the permanent pool or wet storage water surface elevation), unless infeasible, when discharging from sediment basins or sediment traps (Stds & Specs 3.13 and 3.14); Outlet structures that withdraw stormwater from the surface (i.e., above the permanent pool or wet storage water surface elevation) must be utilized, unless infeasible, when discharging from sediment basins or sediment traps. Issued — 10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County RIVANNA VILLAGE: RIVANNA VILLAGE - AMENDMENT 1 AND PHASE II EROSION AND SEDIMENT CONTROL PLAN AMENDMENT 1 AND PHASE II ALBEMARLE COUNTY, VIRGINIA WPO 2018o0007 / EROSION AND SEDIMENT CONTROL PLANS ALBEMARLE COUNTY, VIRGINIA SCE PROJECT NARRATIVE SHEET INDEX Blossom Consulting and Engineering Inc. 1101 Professional Drive, Suite G Williamsburg VA 23185 P: 757-870-4825 1.) COVER THE PROPOSED EROSION AND SEDIMENT CONTROL PLAN FOR PHASE 2 OF RIVANNA VILLAGE 2.) EXISTING CONDITIONS AND DEMOLITION CONSISTS OF THOSE MEASURES NECESSARY TO PREVENT SEDIMENT LADEN RUNOFF FROM 3-) SHEET INDEX ENTERING DOWNSTREAM WATERWAYS. SPECIFICALLY, THIS PLAN ADDRESSES: _ 4a.) MASTERPLAN (STAGE 1) ACCESS TO THE SITE e ..� '� 4b.) MASTERPLAN (STAGE 2) - STAGING AND STOCKPILE AREAS �., \�••� 5.) E&S STAGE I: BLOCK G - CONSTRUCTION SEQUENCING - ON -SITE EROSION AND SEDIMENT CONTROL FACILITIES INCLUDING PERIMETER CONTROIS, SDIMENT TRAPS, AND SEDIMENT BASINS •\ •\ " " 6.) E & S STAGE 2: BLOCK G '7.) BLOCK G: CROSS SECTIONS - STABILIZATION PRACTICES TO BE IMPLEMENTED DURING CONSTRUCTION IN A •1 p •_- • 8.) E & S STAGE 1: BLOCK I & J(EAST) PHASED MANNER TO TREAT DISTURBD AREAS ; `k9gE? STAGE 2: BLOCK I & J (EAST) BLOCK I: CROSS SECTIONS THE PLAN IS DESIGNED TO SPECIFY MEASURES THAT WILL PROVIDE EROSION AND SEDIMENT CONTROL FOR DISTURBED AREAS ASSOCIATED WITH CLEARING, SITE GRADING, UTILITIES, �•. �L7 ,.°' TO.) ROADS AND STORM DRAIN INFRASTRUCTURE. PROPOSED EROSION AND SEDIMENT CONTROL MEASURES INCLUDE: -: \ i '•\ \•• �rlg '�. �• �-'' 11.) E & S STAGE 1: BLOCK J (EAST) 12 J E & S STAGE 2: BLOCK J (EAST) \••� - • % ` 13.) BLOCK J (EAST): CROSS SECTIONS 1) MINIMIZATION OF SITE DISTURBANCE TO PRESERVE STREAM BUFFERS AND RIPARIAN \• 14.) E & S STAGE 1: BLOCK J (WEST) CORRIDORS 2) PHASED CONSTRUCTION PRACTICES WITH STABILIZED CONSTRUCTION ENTRANCES AND CONSTRUCTION ROAD STABILIZATION (WHERE NECESSARY). / , `� � G, �J-2�- 15.) E & S STAGE 2: BLOCK J (WEST) 16.) BLOCK J (WEST): CROSS SECTIONS 3) PERIMETER CONTROLS INCLUDING TREE PROTECTION, DIVERSIONS, SWALES, AND SILT FENCE ////r� •' / \ f v `: J 1�E & S DETAILS (1) KEY PLAN 4) COMBINATION OF SEDIMENT TRAPS AND BASINS USED IN COORDINATION WITH DIVERSIONS AND SWALEs s J l'fyy 5 // �o ti� \ / �•.. _ 18.) E & S DETAILS(3) 1q.) E & S DETAILS (33 ) 5) TEMPORARY AND PERMANENT STABILIZATION OF SLOPES AND GRADED AREAS "= �tilw%� / - / ` 20.) E & S DETAILS (4) 21.) E & S NOTES PHASE 2 AREAS CONSIST GENERALLY OF THOSE LOCATED ON THE EASTERN AND SOUTHWESTERN PORTION OF THE SITE ACCESSED BY GLENMORE WAY (AND EVENTUALLY ROUTE 250). TRAFFIC MANAGEMENT PRACTICES ARE PROPOSED UNDER SEPARATE COVER AND SHALL BE IMPLEMENTED IN COORDINATION WITH THE ACCESS MEASURES PROPOSED HEREIN. THIS PHASE 2 EROSION AND SEDIMENT CONTROL PLAN IS PROPOSED INADDITION TO AND AS q+0� J/ ' ; / SITE DATA PROJECT (SITE) LIMITS = qo.6 ACRES A COMPLEMENT OF THE PHASE i EROSION AND SEDIMENT CONTROL PLANS THAT WERE PREVIOUSLYAPPROVED BY ALBEMARLE COUNTY. AS DETAILED ON THE MASTERPLAN (SHEET / '\ \; / �` PHASE 2 LIMITS OF DISTURBANCE = 58.33 ACRES ISSUE ES-4), SELECT MEASURES OF PHASEi EROSION AND SEDIMENT CONTROL WILL REMAIN IN PLACE DURING PHASE 2 CONSTRUCTION ACTIVITIES. THE FOLLOWING SUMMARY DETAILS THE OVERALL PHASING AREAS FOR THE RTVANNA VILLAGE DEVELOPMENT IN TERMS OF EROSION AND SEDIMENT CONTROL, STORMWATER, AND THE STORMWATER POLLUTION f IFIIFNT SURVEY AND BASE INFORMATION REV# DATE DESCRIPTION PREVENTION PLAN (INCORPORATED BY REFERENCE HEREIN): ` ROUDABUSH, GALE & ASSOCIATES, INC. #1 3 2 18 PER COUNTY COMMENTS #2 q 16 18 PER COUNTY COMMENTS PHASE 1 PROJECT AREA (LIMITS OF DISTURBANCE) = 32.27 ACRES PHASE 2 PROJECT AREA = 68.55 ACRES ( ` `C / I / /On 914 MONTICELLO ROAD CHARLOTTESVILLE, VIRGINIA INCLUDES PORTION OF PHASE i (PREVIOUSLY PERMITTED) THAT IS WITHIN PHASE 2 LIMITS OF DISTURBANCE = 1o.22 ACRES \ \ \ / 22go2 PHASE 2 PROJECT AREA (ACTUAL NEW LIMITS OF DISTURBANCE) = 68.55 -10.22 = 58.33 ACRES OVERALL PROJECT LIMITS = 9o.6 ACRES 6 \ I PHONE: (434) 976-0205 THIS PLAN PRESENTS STAGE i AND STAGE 2 CONSTRUCTION ACTIVITIES AND ASSOCIATED ` \ BOUNDARY SURVEY: ROUDABUSH, GALE & ASSOCIATES (434) 977-0205 TOPOGRAPHIC SURVEY: LOUISA AERIAL SURVEYS, 2008 (540) EROSION AND SEDIMENT CONTROL. STAGE 2 INCLUDES GRADING OF PERMANENT BMPS THAT ARE FINALIZED IN STAGE 3 AS SHOWN ON THE STORMWATER MANAGEMENT PLANS. PRINCIPAL AND EMERGENCY SPILLWAYS, AND OUTFALL PROTECTION ASSOCIATED WITH N .\ �� -\ \ \ J ` `,.�" \ 967-1499 FIELD VERIFIED BY ROUDABUSH, GALE & ASSOCIATES IN 2014 STORM DRAIN INFRASTRUCTURE IS INSTALLED DURING STAGE 2. UPLAND BMPS WITH ENGINEERED SOIL MEDIA AND FINAL BMP LANDSCAPING WILL BE INSTALLED DURING STAGE ,,,.. �•• 3 AS SHOWN ON THE STORMWATER MANAGEMENT PLANS. vv-0 / OWNER/DEVELOPER n r VICINITY MAP: i = i000 SCALE: 1INCH = 25o FEET RIVANNA INVESTMENT HOLDINGS LLC $ - \ 7 ! O' 250' 500' 1,000' CIO ROBINSON DEVELOPMENT GROUP INC. 150 W. MAIN STREET, SUITE L1oo NORFOLK, VIRGINIA 23510 ^�. PROJECT LIMITS � O • � { 1. a r t , '• ` � �� ,�` o� J��, RESPONSIBLE LAND DISTURBER Job No: 1005 Drawn By : BCE s V I �7( ��_�?'.. SCOTT C. BLOSSOMo > lie. No. 40287 SCOTT C. BLOSSOM P.E. SHALL BE THE RLD UNTIL WHICH TIME THE CONTRACTOR IS IDENTIFIED. RLD TO BE IDENTIFIED Date: 12.04.2017 Checked By: scon C. Blow— P.E. COVER • rI /' : �� , ,♦ w� O v BEFORE CONSTRUCTION AND SHALL BE NOTED IN THE SWPPP. I F�`ySIONAL Pat o , J `` DATE: 12/04/2017 — oA n �� 1��+?' 3Bo�� " \I� ✓ �' ` REVISED:3/02/2018 REVISED: -- , 3 ,r 'v 4/16/2018 — g � � � � � -j r �46B/�(C)�� 7 . ` ; �-••-.., I - � > _ ,� � �� \11 Y I ( / �• PREVfOULSYAPPROVED PHASE/ I `— •�•�.,`• �I LucE enwecr Dmrrs • I / / SOILS SUMMARY TABLES MAP SOIL NAME SLOPE HYDROLOGIC SURFACE WATER TABLE 'SAT UNIT SOIL GROUP RUNOFF UPPER LOWER (INMR) LIMIT LIMIT ABELL SILT 0.5] - 1B LOAM 2-7% B MEDIUM 2.0-3.5 >6.0 198 LIGNUM 0.00- 46B SILT LOAM 2-7% C HIGH 1.0-2.5 1.8-3.0 0.06 MANTEO CHANNERY SILT LOAM 2-7% C/D LOW — — 1.98 5.95 MANTEL 51C CHANNERY 7-15% C/D LOW — 1.98- SILT LOAM 62B NASON 2-7% C MEDIUM — SILT LOAM 1.98 W WATER — — — — — — SOIL SURVEY GEOGRAPHIC ISSURGO) DATABASE FOR ALBEMARLE COUNTY, VA SOURCE'. U.S. DEPARTMENT OF AGRICULTURE, NATURAL RESOURCE CONSERVATION SERVICE rPRO 4, NI 1 381 V an A • '1 _ L:, BUFFER '/ \ ; • �..i �� • eREV[DD9LY ° J� J i - APPROVED _. [: `- (_• i- I � / 10 oaecr r •�� • � / h I I •�, / \�� ` i`` .1\ __ ERISTING POND I i 1 , _ I 46 �.� / •` 1/ r \ 4 PHASES RIVANNA VILLAGE �— / f N SCALE: T INCH = 15o FEET 0150' 300' 450' CONTOUR INTERVAL = 2 FT NOTES THE PROPOSED RIVANNA VILLAGE DEVELOPMENT ENCOMPASSES AN AREA OF FOREST AND OPEN MEADOW LOCATED APPROXIMATELY _5 MILES SOUTHEAST OF CHARLOTTESVILLE VIRGINIA. THE SITE IS CHARACTERIZED BY MODERATE SLOPES AND WOODED CORRIDORS THAT WILL BE PRESERVED AS A COMPONENT OF THIS PLAN. TWO (2) EXISTING PONDS ARE LOCATED NEAR THE CONFLUENCE OF THE EXISTING INTERMITTENT STREAM CHANNELS. EXISTING WATER FEATURES INCLUDE Uo8 ACRES OF WETLANDS AND 2,645 LINEAR FEET OF STREAM CHANNELS THAT DRAIN TO THE RIVANNA RIVER LOCATED APPROXIMATELY 4 MILES DOWNSTREAM. THE PREVIOUSLYAPPROVED PHASE I RIVANNA VILLAGE PROJECT LIMITS COVERED 3-7 ACRES. PROPOSED PHASE 2 SITE AREA - 68.55 ACRES, WHICH INCLUDES 10.2 ACRES OF SITE AREA THAT WAS PREVIOUSLY APPROVED WITHIN THE PHASE 1 LIMITS OF DISTURBANCE. THUS, THE NEW PROPOSED LIMITS OF DISTURBANCE IS 58.3 ACRES. GLENMORE WAY AND PIPER WAY SERVE AS THE ENTRANCE ACCESS TO THE ADJACENT NEIGHBORHOODS. THE ADJACENT NEIGHBORHOODS ARE NOT ADVERSELY AFFECTED BYTEH CONSTRUCTION ACTIVITIES. STEAMER DRIVE IS AN EXISTING ACCESS ROUTE APPROVED AS A COMPONENT OF THE PHASE I EROSION AND SEDIMENT CONTROL PLANS. THIS ENTRANCE WILL REMAIN IN PLACE AND ADDITIONAL ENTRANCES ARE PROPOSED WITH PHASE 2 CONSTRUCTION ACTIVITIES, INCLUDING AN ENTRANCE OFF OF ROUTE 250. PHASE P CONSTRUCTION ACTIVITIES WERE INITIATED IN 2017. I'S A COMPONENT OF PHASE 2 CONSTRUCTION, EXISTING STRUCTURES WITHIN THE LIMITS OF DISTURBANCE NEAR ROUTE 25o AND NEAR THE EXISTING POND WILL BE DEMOLISHED. IN ADDITION, A PORTION OF CUMBRIA LANE WILL BE RETROFITTED AND REPAIRED. ALL DEMOLITION ACTIVITIES WILL BE CONDUCTED IN ACCORDNACE WITH STATE AND LOCAL STANDARDS. LEGEND RIVANNA VILLAGE: EROSION AND SEDIMENT CONTROL PLAN AMENDMENT 1 AND PHASE II ALBEMARLE COUNTY, VIRGINIA SCE Blossom Consulting and Engineering Inc. 1101 Professional Drive, Suite G Williamsburg VA 23185 p: 757-8704825 TAREA (PREVIOUSLY (PREVIOUSLYAPPROVED) PHASES PROJECT AREA (LIMITS OF DISTURBANCE) EXISTING WETLANDS KEY PLAN ' (PER KIRK HUGHES & ASSOC. SURVEY) OEXISTING STREAM CHANNEL ASSOC.& ASS (PER KIRK HUGHES & SURVEY) EXISTING POND (PER KIRK HUGHES & ASSOC. SURVEY) APPROXIMATE EXISTING TREE LINE (PER KIRK HUGHES & ASSOC. SURVEY) \ EXISTING ROAD (PER KIRK HUGHES & ASSOC. ISSUE \� SURVEY) REV # DATE DESCRIPTION EXISTING FENCE KIRK HUGHES &ASSOC. #1 3 2 18 PER COUNTY COMMENTS SURVE SURVEY) #2 4 (iA8 PER COUNTY COMMENTS BUILDING ®EXISTING (PER KIRK HUGHES & ASSOC. SURVEY) EXISTINGPOWERPOLE O (PER KIRK HUGHES & ASSOC. HUGHES&A SURVEY) SIGN OEXISTING a (PER KIRK HUGHES &ASSOC. SURVEY) OEXISTING MANHOLE (PER KIRK HUGHES& ASSOC. OF, DJ�� SURVEY) o$�,PLTH EXISTING CONTOURS (PER KIRK HUGHES& ASSOC. ?� 2 SCOTT C. BLOSSOM m Lic. No. 40287 SURVEY) a EXISTING STREAM BUFFER `ys'70NAI, (PER ALBEMARLE COUNTY) APPROXIMATE SOIL 51C BOUNDARIES Job No: 1005 Drewn By BCE Date: 12 04.2017 1 Checked By S—c Blossom, PE. i/ EXISTING CYANIC SOIL (MANTEO CHANNERY SILT LOAM) EXISTING CONDITIONS AND DEMOLITION OSTEEP SLOPES (GREATER THAN 25%) rlu:PnrH.cwmsw�m mpba.lv.arencwos Rrvz.rer+Ev'wes§�z.e a�zMlscnowos_ars.reaHz_Esc_aEvi.a�.sI0111IM„z. m,e zU,:S.lunu�:i E. cmen�c.c ES-2 �� / LEGEND IVANNA VILLAGE PROPosEDLIMITSOP ER OSION AND SEDIMENT CONTROL PLAN DISTURBANCE „�• 1 / /-T / / / / �� 1/ / / / / — _ \ //// T ��\� \��\� \�\ BLOCKLIMTTS AMENDMENT 1 AND PHASE II .` J as 9 aoo ��v J II A C V A AAA A /3az� ALBEMARLE COUNTY, VIRGINIA // \Z\ EXISTING WETLANDS •�' \ KIRK HUGHES & ASSOC. J I \\ \ (PER __ _ !� � ( BLOCK I SHEETS 8 12) \\1 \\ (SEE - / \ I \\ \\\\ \ J—�----��—��y\�� f \ \\ APPROXIMATE MATE EXISTING ----------'^r-- T P _—--- I ` \� J I\\\�1/r� \ \ STREAM CHANNEL LIMITS (PER KIRK HUGHES & ASSOC. BIO(K B BLOCK D, F AND G (SEE SHEETS 5 - 7) r` V : SURVEY) EXISTING STREAM BUFFER � �•.� �`ibl,.I '�, � \ � V -��\ � �� \ \\ APPROXIMATE EXISTING TREE LEVE •� ,�Ec�, '�, / / / i \\ \ \ (PER KIRK HUGHES & ASSOC. I ��`1'r7ro I �, � � �\ � / �� 1 \\�� \�� SURVEY) •`'•� � '�. I ) \ / / \ ��\� EXISTING ROAD (PER KIRK HUGHES & ASSOC. •.� I SURVEY) B Consulting and Engineering Inc. 01 Professional D, Suite G 01 Pro me \I\ \ \ (PERTHIRK HUGHES & ASSOC. •`•• \ SURVEY) •` I Williamsburg VA 23185 P 757-870-4825 131.(1CK I: •• r /I I II \\ \ •` I III �•• I (PER EXISTING ` ai _ EXISTIBUILDING `. `. I — NG I— HUGHES & ASSOC. — — — — — — — — — — — — — — — —. — — — — ,II i SURVEY) ` I •..` C��\ I BLOCK I I RiDCKi \ — RLOCK"--.-1 \ II I I I IRIOCKF I I I 17- II I 11L001 BLOCK 11I I II a�s I I— ��:� KEY PLAN — — — — — — — — — — — — I-- — _'— I I �� l3LOCl<t I I I I I I I R I.00KII BLOCRJ(WEST I � I I\ \ -- I \ I I;7.00KJ(EAST) I I I I I I I I ISSUE REV # DATE DESCRIPTION � I• I I I — — — — — — — — — — — — J I #i 3/2/18 PER COUNTY COMMENTS #2 4 i6 i8 PERCOUNTYCOMMENTS =ss _ I BLOCR J (EA3T) I , — J I '•• I I PLTH Op o$�� of�j SCOTT C. BLOSSOM _ vv �-- _— — — — — ---I BLOCK I AND J(EAST) (SEE SHEETS 11 - 15) Lic. No. 40287 �o Ewa ssIONAL an.a se — BLOCK H AND J(WEST) SHEETS 14 16) I \ ,lob No: 1005 Drawn By: BCE (SEE - \ N — — — — — — — — — — — — — — — —✓✓— — — — I \ - Date: 12.04.2017 Checked By: S—c. Rl—., P.E. SHEETINDEX SCALE: I INCH = 15o FEET o' 150' 300' 600' CONTOUR INTERVAL= 2IT — ES I A —� �� / �) \ A \V� V� V AA \ �y y \ - \ �� v A v v LEGEND EROSION AND SEDIMENT CONTROL MASTERPLAN / ,� / .— — \\ \ .�- \ \` \ / / \\ SUMMARY THIS PHASE z EROSION AND SEDIMENT CONTROL PLAN FOR A �, \ \ -- NOTE: ALL PERIMETER SILT FENCE ADJACENT \ ' �, / r--\VA V A TO PRESERVED STREAM CHANNELS SHALL BE \ \ l ` / / �\ \ \� \ I / \ /� / / \ ' ^ \ 1 f \�\ \\ SUPER SILT FENCE SHOWN ON DETAIL Q, � � I \ � � �- �� • PROPOSER PHASE z LIMITS OF DISTURBANCE (SITE) LOIJ R I VA N N A VILLAGE: EROSION AND SEDIMENT FROM VILLAGE IS DESIGNED TO PREVENT SEDIMENT LADEN RUNOFF FROM RUNOFF BEING TRANSPORTED TO DOWNSTREAM RECEIVING WATERWAYS AND IS PREPARED IN CONSIDERATION OF THOSE MEASURES SPECIFIED AND APPROVED ON THE PHASE. EROSION AND SEDIMENT CONTROL PLANS. � /1 / \ � \� LT SHEET 1S. SUPER SILT FENCE SHALL SERVE AS -_ \ \ j / J I \ \\ \ \ \ / \l J I \ \ \ \ \\\\ TREE PROTECTION. SAFETY FENCE SHALL BE / / INSTALLED INACCESSIBLE AREAS NEAR THE SITE BENCHMARK (PER ROUDABUSH, GALE AND CONTROL MASTERPLAN ALL MATERIALS AND CONSTRUCTION METHODS SHALL CONFORM TO v -- �' / \ \ / \\� EXISTING FIREHOUSE IF REQUESTED BY \\MENDMENT � / I J ASSOC.A880CSURVEY) 1 AND PHASE II CURRENT SPECIFICATIONS AND STANDARDS OF VDOT UNLESS a� ' \ \ \\ C �- \ _ _ �a �j �j l \ \ ALBEMARLE COUNTY INSPECTOR. \ '_ �� ALBEMARLE COUNTY, VIRGINIA OTHERWISE NOTED. _ - / \\ 4 � i r II / ; a 3 u / 1 1' \ / / / ��j �� \\\ "" O EXg IR WETLANDS (PERKIER HUGHES ffiASSOC. ALL EROSION AND SILTATION CONTROL MEASURES SHALL BE PROVIDED IN ACCORDANCE WITH THE APPROVED EROSION CONTROL PLAN AND SHALL BE INSTALLED PRIOR TO ANY CLEARING, GRADING l ; / \ \ \ _ � - / \ EXISTING OR OTHER CONSTRUCTION. ,. �;=l PROPOSED STOCKPILES LOCATED ON UPLAND AREAS OUTSIDE OF ,- �` -� �f -.,; " - / /l 1 J / . STREAM CHANNEL LIMITS ALL EROSION AND SEDIMENT CONTROL MEASURES SHALL BE ,• _ / / CONVEYANCE AREAS MAY BE MODIFIED UPON APPROVAL OF 0 ` _ a^ee o J j s / / ALBEMARLE COUNTY FIELD INSPECTOR CONTRACTOR SHALL BE \ ,). T ^ Ner J /�/� / / RESPONSIBLE FOR LOCATING DEWATERING AREAS FOR SEDIMENT\\ O (PER KIRK HUGHES&ASSOC. SURVEY) CONSTRUCTED AND MAINTAINED ACCORDING TO MINIMUM STANDARDS AND SPECIFICATIONS OF THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK AND VIRGINIA REGULATIONS VR _ "" --- \ / ( / ACCUMULATED IN EXISTING POND AND PROVIDING PERIMETER a. � A OFFSITE DRAINAGE AREA SHALL BE CONVEYED �� // I � I ROUGH THE SITE TO MAINTAIN 'CLEAN I / CONTROLS AS NEEDED DURING DRYING AND DEWATERING THROUGH �•• '9S \ EXISTING POND KIRK HUGHES ffiASSOC. 6zS-02-00 EROSION AND SEDIMENT CONTROL REGULATIONS. F WATER BYPASS IN EXISTING CHANNEL DURING \ / ACTIVITIES SIIRV7� SURVEY) 2A INCONSIDERATION THAT PI -LASE t CONSTRUCTION ACTIVITIES WERE CONSTRUCTION. DIVERT DISTURBED AREAS R FROM EXISTING CHANNELS WITH RIGHT OF / / \\\ \\ •� O - �- \ WAY DIVERSIONS AND DIVERSION DIKES AS "� - I \ APPROXIMATE INITIATED IN z017, THIS PHASE Z PLAN UTILIZES SELECT EROSION AND SEDIMENT CONTROLS THAT HAVE PREVIOUSLY BEEN CONSTRUCTED. �C - / �� •� %� SHOWN HEREIN / -� / \ EXISTING TREE LINE (PER KIRK HUGHES & ASSOC. E SPECIFICALLY, SEDIMENT BASINS LOCATED IN BLOCKS D, F AND A TREAT PORTIONS OF VIOUSLY PROVED WELL AS \ e �• / s \ — \ SURVEY) MIT OFFSITE DRAINAGE AREA SHALL BE CONVEYED ac, S x - '-' \ J THROUGH THE SITE TO MAINTAIN'CLEAN NT IN BLOCKS H. IN AD IT PHASE2DEVEIAPMENTINBLOCKSD,FAND H.INADDTTION, SEDIMENT TRAPS PREVIOUSLY CONSTRUCTED IN PHASE I BLOCK H - � / / erncKe _ L WATER'BYPASS IN EXISTING CHANNEL DURING 3' �••�. •�• / CONSTRUCTION. DIVERT DISTURBED AREAS I EXISTING ROAD S ffiASSOC. WILL REMAIN IN PLACE TO TREAT PROPOSED PHASE 2 DEVELOPMENT - •�• - -- � FROM EXISTING CHANNELS WITH RIGHT OF •�• SURVEY) SURVEY) Blossom Consulting and Engineering Inc. Professional Drive, Suite Williamsburg VA 23185 WITHIN BLOCK H. EXISTING PHASE t STOCKPILE AREAS AND WITHIN CONSTRUCTION ENTRANCES (CEtffiGEz)MAY ALSO BE USED IN CONJUNCTION WITH PHASE 2 CONSTRUCTION. •� WAY DIVERSIONS AND DIVERSION DIKES AS k $$F •�. _ _ SHOWN HEREIN EXISTING I-- ,^" - �• - -- ti / (PER KIRK HUGHES & ASSOC. '�•• SURVEY) P 757 870-4825 THIS PHASE 2 EROSION AND SEDIMENT CONTROL PLAN CONSISTS OF TWO (2) STAGES. STAGE t GENERALLY CONSISTS OF THE INSTALLATION �• �•• •�.• � _ \ � / � \ / I 7 \ SS F / /�Q EXISTING BUILDING OF THE FOLLOWING MEASURES: ♦ LO „ / / ••�• / \ �•� / ` O (PER KIRK HUGHFS&ASSOC. SURVEY) tJ PERIMETER CONTROLS (I.E. SILT FENCE, SUPER SILT FENCE AND FENCE), z. CONSTRUCTION ENTRANCE GE, AND CE2 (EXISTING), CE3 AND CE 4 --- / ' ' CWD �SAFETY •�` / `•��••`•• CE4 - / / / EXISTING POWER POLE (PROPOSED PRASE 2)) AND TEMPORARY STREAM CROSSINGS (CSC #3-7). 3JSEDIMENTTRAPS AND BASINS SIZED TO TREAT CONTRIBUTING SUB 3 \ \ / SEE PHASE EROSION AND CE3 / / HUGHES &ASSOC. SURVEY) WATERSHED WITH PROPOSED DISTURBANCE. 4.) DIVERSION DIKES AND RIGHT OF WAY DIVERSIONS DESIGNED TO CONVEY RUNOFF FROM DISTURBED AREAS TO PROPOSED STRUCTURAL EROSION AND SEDIMENT CONTROL MEASURES(I.E. TRAPS AND SEDIMENT CONTROL PLANS FOR t �• ADDITIONAL INFORMATION DV // •�• REGARDING PHASE I DIVERSION s _. LOD'! \ 1 •� ocKG DIKES AND SEDIMENT BASINS IN etacKc ♦ DV O EXISTING SIGN (PER KIRK HUGHES &ASSOC. SURVEY) BASINS) WHILE ALLOWING CLEAN WATER FROM OFF SITE UNDISTURBED AREA TO BYPASS THROUGH THE SITE. , ,. BLOCK D AND F (DISTURBED AREA ; PREVIOUSLY CONVEYED TO - - I DV DV 1 I DV / •`••�• z a FACILITY). CS1 a AND CSI(SB1) TO =- `'E0 O ��• mn EXISTING MANHOLE (PER KIRK HUGHES & ASSOC. STAGE 2 Y CONSISTS G EROSION AND EAND I K - I01)1 REMAIN IN PLA PLACE THROUGHOUT I 1 / •�••`• SURVEY) SEDIENT PHASE - 2 E & S STAGES \.`C'j DV `y_ s�ocK�EXISTING / G$3'J. CONTOURS 5.) CONVERSIONMF SEDIMENT TRAPS BASINS TO TO ROUGH PERMANENT BMPS AS SITE EARTHWORKS ARE COMPLETED AND A '��\�'p raE2 SSF / t swcicK -a •� •, _� I ST `••�• (PER KIRK HUGHES & ASSOC. ROADS, INFRASTRUCTURE AND RETAINING WALLS ARE INSTALLED, G ` o SURVEY) NOTE THAT FINAL COMPLETION OF PERMANENT BMPS CONVERSION SEQUENCING IS PROVIDED IN THE STORMWATER MANAGEMENT PLANS (STAGE 3). --- _. O /" I t ST \ TSC Q aKF\ \ GS1 #6 PHASE 1 SEDIMENT BASIN SB1 2 EXISTING STREAM BUFFER (PERALBEMARLE COUNTY) KEY PLAN 6J REMOVAL OF TSC 5-7 AND CONSTRUCTION OF PERMANENT BRIDGE STRUCTURES. CONVERSION OF TSC 3-4 TO PERMANENT CULVERTS. 6J REMOVAL OF RELICS DIVERSION DIKES AS STORM DRAINAGE /Y \ SHALL REMAIN IN PLACE UNTIL GJ� TSC 'F$C` \` UPSTREAM WATERSHED IS P #3 #S \ \ STABILIZED ONCE STABILIZED, � � - %� APPROXIMATE SOIL \` \\�'�� INFRASTRUCTURE IS INSTALLED. CONTROLS TO LOCATIONS TEMPORARY W PERIMETER DEVELOPMENT THAT ILL REMAIION N THAT WILL REMAIN IN PLACE WHEN PHASE z DSVELOPMFNf PLANS ARE IMPLEMENTED 8.) STABILIZATION OF THE SITE. RUNOFF FROM SBI DRAINAGE CEl sL�K° $P / \: O AREA SHALL BE DIRECTED TO / DV SP FOND (SE OF LEVEL 2 WET \ POND(SEEPHASA I S \ ,`\ +; BOUNDARIES SOIL EXISTING HYDRICRYS STORMWATER PLANS) - /� � DV � \ // (MANTEO CIIANNERY SILT LOAM) GENERAL CONSTRUCTION NOTES FOR CONVERSION OF/M LGGKAc ,•/• TSC ) \ Iz LOD, �'�.,` SSF /�• - PROPOSED DIVERSIOx DIKE DV EROSION AND SEDIMENT CONTROL MEASURES TO STORMWATER MANAGEMENT FACILITIES / i # 1. ALL DAMS AND CONSTRUCTED FILL TO BE WITHIN 95% OF MAXIMUM DRY DENSITY AND 2% OF OPTIMUM MOISTURE CONTENT. ALL FILL MATERIAL TO BE APPROVED BY A GEOTECHNICAL ENGINEER. A , ' -- BI-Ks _ $$ \ DV �* PHASE 1 SEDIMENT TRAPS (HS1 - / / SB1 r I Il / '��•_ � , *` I T CLEAN WATER DIVERSION CWD GEOTECHNICAL ENGINEER IS TO BE PRESENT DURING CONSTRUCTION AND HS2a) IN BLOCK H TO I I /�•• / REMAIN IN PLACE FOR PHASE 2 JO ISSUE OF DAMS. 2. PIPE AND RISER JOINTS ARE TO BE WATERTIGHT WITHIN TSC CONSTRUCTION ACTIVITIES. �`\ / ST I #'7 CR$ •//�•� DV CONVERSION TO PERMANENT / O/,, I x\..�• BMPS SHOWN ON PHASE 2 + - O PROPOSED SUPER SILTFFNCE SSF O REV # DATE DESCRIPTION STORMWATER MANAGEMENT FACILITIES. , - - DV SEDIMENT BASIN (12) SHALL BE CONSTRUCTED IN STORMWATER MANAGEMENT \� - / I" �� PLANS T$C f LOCATION PROPOSED BMP (BE C AND CONVERTED #1 3/2/t8 PER COUNTY COMMENTS #z q t6 t8 PER COUNTY COMMENTS 3. FOR TEMPORARY SEDIMENT TRAPS OR BASINS WHICH ARE TO BE CONVERTED TO PERMANENT STORMWATER MANAGEMENT FACILITIES; i r '' ;` //* UPON STABILIZATION OF CONTRIBUTING DRAINAGE #I _� _• _ .,;SSF // x * PROPOSED STOCKPILE WITH CONVERSION IS NOT TO TAKE PLACE UNTIL THE SITE IS STABILIZED, AND PERMISSION HAS BEEN OBTAINED FROM THE COUNTY EROSION AREA J ` \ / \ 1 / x / �' x �* ;" CRS - I • O PERIMETER CONTROLS (SILT FENCE) SP CONTROL INSPECTOR . O EXISTING POND SHALL BE DRAINED AND DE -WATERED PRIOR -' — - S ' ' - -' \ J SSF "- x $T TO ROUGH GRADING TO ATTAIN SEDIMENT BASIN DESIGN q. SELECT NS MEASURES MAY BE IMPLEMENTED DURING PHASE z STAGE CONSTRUCTION AND THEN MODIFIED DURING STAGE �\\ S'j' _3`: /� VOLUME REMOVE SEDIMENT AND DEBRIS TO APPROVED - _ I I DISPOSAL FACILITY AND/OR DE WATER ON SITE MAINTAIN 3. •� \ �`\ O SSF / O PROPOSED CONSTRUCTION ENTRANCE CE t z (AND 3). PROPOSED TEMPORARY STREAM CROSSINGS ARE DESIGNED AND .��: \O \ OFF SITE DRAINAGE AREA BYPASS IN EXISTING STREAM DURING STAGE I CONSTRUCTION DIVERT STREAM CHANNEL SHALL BE IMPLEMENTED TO AVOID IMPACTS IN AREAS SHOWN AS PRESERVED ON THE PERMIT APPLICATION. j $$F ) r/ 'CWD DURING CONSTRUCTION OF EMBANKMENT (AS SHOWN IN �; \;�\ \ \ /pr DV STAGE 2 EROSION AND SEDIMENT CONTROL PLAN). L O PROPOSED TSC O S. EXISTING BE ENTRANCES ALONG AND PARALLEL TO STEAMED DRIVE SHALL BE MAINTAINED AND UTILIZED IN PHASE 2 AS NEEDED TO ACCESS EXISTING STAGING AND STOCKPILE LOCATIONS. ff s wcKaavac(1 �j IMPLEMENT STAGE 3 STORMWATER MANAGEMENT PLANS I AFTER CONTRIBUTING WATERSHED IS STABILIZED. _- � \ A, � � � �. � � �' � I - J� 1` /'"--_� I' 1 I SSF �\ ,�, TEMPORARY STREAM CROSSING PROPOSED SEDIMENT TRAP ST 6. CONSTRUCTION ENTRANCES SHALL BE EQUIPPED WITH TRUCK •� ; '�+ \ �` ST �� $T T#2 F TH Op L `I WASH DOWN AREAS ADJACENT TO EXISTING ROADWAYS CLE. STEAMER DRIVE AND ROUTE 250). 7.) STRHAM BUFFER LIMITS SHALL BE CLEARLY IDENTIFIED AND PHASE 1 SEDIMENT BASIN ', �- � \ �\ t \ x \ \ nuocK�(EAM TO REMAIN IN PLACE TO - TREAT BLOCK F & D (SIZED �^ ` ST D�7 \ \ \ DV ADEQUATELY IN PHASE 1 , +� • SQ//may PROPOSED SEDIMENT BASIN $$ 0 2. SCOTT C. BLOSSOM MARKED IN THE FIELD WITH SUPER SILT FENCE. , _ _� - DV \ ` ` , Lic. No. 40287 8.) PHASE 2 STAGE 2 EROSION AND SEDIMENT CONTROL PLANS DEPICT , \ ` 3so.: x \+ + " ` \�. \ \ LOD \ PROPOSED CONSTRUCTION CRS �0 ELEMENTS TO BE IN PLACE PRIOR TO CONVERSION TO PERMANENT' BMP FACILITIES AS SHOWN ON THE STORMWATER PLAN. � ,, \ \OU�LL ..\ :`• CWD / ROAD STABILIZATION g G~{ LONAL �'(cJ \ '1 9.) ALL EROSION AND SEDIMENT PERIMETER CONTROLS SHALL REMAIN IN PLACE THROUGHOUT CONSTRUCTION ACTIVITIES AND REMOVED ONLY WHEN FINAL SITE STABILIZATION IS ACHIEVED. "' '� �� \ MAINTAIN BASE FLOW �` /* / �yO,�` \ \, / \ CHANNELANDPROVIDE / \; '�� / PROPOSED CONSTRUCTION ACCESS ROUTE (USE DUST CONTROL PERVESCH339) 21P �\ FLANKING BASINS/IRAPS i CJ� `I 1 a , NOTE: ALL Job 1017 Drewn By: BCE N _ i �QNP 0 A CLEAR WATER DIVERSIONS SHALL TERMINATE INTO OUTFALL PROTECTION (CL 1 RIP RAP MIN LENGTH 20 FT). O PROPOSED BLOCK LIMITS Date: 12.04.20 Checked By: soon c. RI- P.E. MASTERPLAN NOTE: AL'I, SILT FENCE AND SUPER SILT FENCE S ALL A MINIMUM OF 5 FT FROM STREAM NOTE: SEE SHEET ES- 20 FOR PUMP AROUND DETAIL SCALE: 1 INCH = lso FEET -_ _ \ ( \\ SEE SHEET ES-1'7 FOR CONSTRUCTION ENTRANCE / DETAIL O' 150' 300' 450 '� - \ I \ 1 �°- SEE SHEET ES-2oFOR TEMPORARY/PERMANENT `^- ^ CONTOUR INTERVAL = 2FT SEEDING DETAILS AND SPECIFICATIONS E J �I 4 / r \ \ \ \ � � LEGEND EROSION AND SEDIMENT CONTROL MASTERPLAN — \ \ i � _. � 1 � � � \ J / — , I —� �\ \ �'"- \� \ \ NOTE: ALL PERIMETER SILT FENCE SUMMARY THIS PHASE 2 EROSION AND SEDIMENT CONTROL PLAN FOR RIVANNA / / � � � \ \ l ' /_�\ ADJACENT TO PRESERVED STREAM \ \ \ \� ' ` 1 \ \ \ � �\ \ \ CHANNELS SHALL BE SUPER SILT FENCE \ � j � / , PROPOSED PHASE z LIMITS OF DISTURBANCE SITE I.I)D RIVANNA VILLAGE: EROSION AND SEDIMENT VILLAGE IS DESIGNED TO PREVENT SEDIMENT LADEN RUNOFF FROM\\\ � I / � / ^ f _ > AS SHOWN ON DETAIL 4, SHEET 18. // \\�\\\� > (SITE) CONTROL MASTERPLAN BRING TRANSPORTED TO DOWNSTREAM RECEIVING WATERWAYS AND IS PREPARED IN CONSIDERATION OF THOSE MEASURES SPECIFIED AND o;IJ / / / s- \ ji / I / �\ \\\\\� \ SUPER SILT FENCE SHALL SERVE As / I f /' \ \\�� \\ \ \ \\ TREE PROTECTION. SAFETY FENCE \ \ (TIE BENCHMARK APPROVED ON THE PHASE. EROSION AND SEDIMENT CONTROL PLANS. ALL MATERIALS AND CONSTRUCTION METHODS SHALL CONFORM TO CURRENT SPECIFICATIONS AND STANDARDS OF VDOT UNLESS „r-> - ��\ / I / J -' \\� I F, \ SHALL BE INSTALLED IN ACCESSIBLE �' STAGE 1 CLEAN WATER DIVERSION J �- C \� J - I r \ \\�. J \ \ AREAS NEAR THE EXISTING FIREHOUSE / \ I / SHALL BE CONVERTED TO \ -"� I ` \ O PER ROUDABUSH, GALE AND ASSOC. SURVEY) AMENDMENT 1 AND PHASE II OTHERWISE NOTED. _ n � \\_ \ J \\ \\ � IF REQUESTED BY ALBEMARLE COUNTY 1 PERMANENT DRAINAGE SWALE AS \ \ / l 1' SHOWN ON GRADING HEREIN AND \\� O C \ INSPECTOR. - EXISTING WETLANDS KIRK HUGHES & ASSOC. ALBEMARLE COUNTY, VIRGINIA ALL EROSION AND SILTATION CONTROL MEASURES SHALL BE PROVIDED IN ACCORDANCE WITH THE APPROVED EROSION CONTROL i -� \ \ \ \ \ \ \ (PER _ J / ON STORMWATER MANAGEMENT \\\\� \ \ \ SURVEY) �✓ -� ', �` \\ PLAN AND SHALL BE INSTALLED PRIOR TO ANY CLEARING, GRADING OR OTHER CONSTRUCTION. _ _ / J PLANS. REMOVE CWD ONLY AFTER \ \ ALL SUPER SILT FENCE SHALL BE -__� _ �i UPSTREAM CONTRIBUTING SITE \ "' MAINTAINED AT A MINIMUM OF $ FT EXISTING STREAM CHANNEL LIMITS ALL EROSION AND SEDIMENT CONTROL MEASURES SHALL BE 7 _ _ AREA IS STABILIZED AND / FROM STREAM BANKS, i RECEIVI ___ RECEIVING PERMAMENET SWALE IS / / \ C -� STABILIZED O PER KIRK HUGHES &ASSOC. SURVEY) CONSTRUCTED AND MAINTAINED ACCORDING TO MINIMUM STANDARDS AND SPECIFICATIONS OF THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK AND VIRGINIA REGULATIONS VR , ��•• '9s _ o 1 I 1 \ / �\ EXISTING POND (PER KIRK HUGHES & ASSOC. 625-02-00 EROSION AND SEDIMENT CONTROL REGULATIONS. PHASE2 STAGE2 SUPER SILT �\ _ ` F2A \ / l FENCE SHALL REMAIN IN PLACE \\ SURVEY) IN CONSIDERATION THAT PHASE CONSTRUCTION ACTIVITIES WERE (� RO✓ \ DURING INTERMEDIATE GRADING \ \ i — OF BMPS AND DURING FINAL `\\ \\ \\\\~ \ °l� \ J APPROXIMATE INITIATED IN zot7, THIS PHASE Z PLAN UTILIZES SELECT EROSION AND SEDIMENT CONTROIS THAT HAVE PREVIOUSLY BEEN CONSTRUCTED. SPECIFICALLY, SEDIMENT BASINS LOCATED IN BLOCKS D, FAND H , �.. FC •� '� v \\\� --_ CONSTRUCTION OF EMIRS (AS ` \ r�� i \ DEPICTED ON THE STORMWATER \ �\ \\\�,I ��\ EXISTINGTREELINE SERKIRKHUGHES &ASSOC. SURVEY) TREAT PORTIONS OF PREVIOUSLY APPROVED BLOCK CAS WELL AS PHASE 2 DEVELOPMENT IN BLOCKS D, F AND H. IN ADDITION, lain •� - �\ MANAGEMENT PLANS). SUPER SILT\\J S \ FENCE SHALL BE REMOVED ONLY ` \ \\\ \ \\ `� / WHEN THE UPSTREAM ` \ \ \ \ EXISTING ROAD KIRK HUGHIS & ASSOC. $C E SEDIMENT TRAPS PREVIOUSLY CONSTRUCTED IN PHASE, BLOCK H WILL REMAIN IN PLACE TO TREAT PROPOSED PHASE 2 DEVELOPMENT / ` "" ••�, � � I � \� CONTRIBUTING WATERSHED AND \ •�, BMPS ARE STABILIZED. 1 -^\�\� ��, (PER SURVEY) Blossom Consulting and Engineering Inc. 1101 Professional Drive, Suite G Williamsburg VA 23185 WITHIN BLOCK H. EXISTING PHASE t STOCKPILE AREAS AND CONSTRUCTION ENTRANCES GE t & CE2) MAY ALSO BE USED IN CONJUNCTION WITH PHASE 2 CONSTRUCTION. .� _ \ � � ��C � � II ) / �I _ ��, / / ) 1 \ \ _ f -� \��\� EXISTING FENCE 1\ (PER KIRK AUGAES & ASSOC. THIS PHASE 2 EROSION AND SEDIMENT CONTROL PLAN CONSISTS OF• 1 SURVEY) P 757870-4825 / ✓ -� ) \ \ �., '�• TWO (2) STAGES. STAGE t GENERALLY CONSISTS OF THE INSTALLATION OF THE FOLLOWING MEASURES: � � � / EXISTING BUILDING y / RK HUGHFS &ASSOC. \ /® k ` / / / I \/ SIIRVl:l� SURVEY) tJ PERIMETER CONTROLS (I.E. SILT FENCE, SUPER SILT FENCE AND ETY FENCE) CE3 AND CE 4 // � II//� / ♦ � ` / x ' \ `\/// O •• / / / 1 \ \ \ ` \ , x T O `•� I � a O EXISTING POWER POLE (PER KIRK AUGAFS & ASSOC. (PROPOSED PHASE z)) AND TEMPORARY STREAM CROSSINGS (TSC #3-7).� TO TREATCONTRIBUTING . SEDIMENT HASPS AND BASINS SIZED TO TREAT CONTRIBUTING SUB 3) OPOSED SS SIZED WAIERSHEDT TRA a / I ... : � _ , `. / I\ `x, ••`' /�, PRUCTION 4.) DIVERSION DIKES AND RIGHT OF WAY DIVERSIONS DESIGNED TO - \� ) / / () I� \ ei <�cx i; •� O '\ `x�( = r ERISTIN SIGN CONVEY RUNOFF FROM DISTURBED AREAS TO PROPOSED STRUCTURAL EROSION AND SEDIMENT CONTROL MEASURES I.E. TRAPS AND _ B/C \ w , / / \ nwcrcc \ Y I _ v�� •�• I / ♦ \ '�• / o O PER KIRK HFS &ASSOC. KHUG SURVEY) BASINS) WHILE ALLOWING CLEAN WATER FROM OFF SITE UNDISTURBED AREA TO BYPASS THROUGH THE SITE. J <� `) 0 \ O\ O�� Q 0 •� / / / lJ ,.- Ov -_ T, EXISTING MANHOLE ��, �.�. S _ O Q �� •�••� (PER KIRKHUGHFS &ASSOC. STAGE 2 GENERALLY CONSISTS OF THE FOLLOWING EROSION AND'1� SEDIMENT CONTROL MEASURES: 0 s s (/v �G) �s �\ O 0 _ {`� �' `••�•. SURVEY) C ONTOIIR9 5J CONVERSION OF SEDIMENT TRAPS AND BASINS TO ROUGH GRADED PERMANENT BMPS AS SITE EARTHWORKS ARE COMPLETED AND AND INSTALLED. G WALLS NAi. S -_ _ BLocrerc \�� / / /> . \�\ 1 \ J�1 r `-' _ ` G'C�'/� • -0 �, I �� B /%\' 19URVEY)KEXISTING 'j!�%� r O` 'P ... \ �P \ °�o RUCHES & ASSOC COMPLETION OF PERMANENT BM CO ON SEQUENCING IS PROVIDED IN THE STORMWATER MANAGEMENT PILES (HAIR STAGE cX P :� �, / + \ V Q 0 \ \` ��/ y / oP + (�1/\"R l �.`l�- T EXISTING STREAM BUFFER COUNTY) 3). 6J REMOVAL OF TSC 5 7 AND CONSTRUCTION OF PERMANENT BRIDGE STRUCTURES. CONVERSION OF TSC 3-4 TO PERMANENT CULVERTS. ". ,'\ • \.\ ZQPQ,� t o ., �. \ > / O O \� (PERALBEMARLE KEY PLAN 6. REMOVAL OF SELECT DIVERSION DIKES AS STORM DRAINAGE INFRASTRUCTURE IS INSTALLED. P5� © P O BLOC. /+ / \ O APPROXIMATE SOIL BOUNDARIES 7.) RELOCATION OF TEMPORARY PERIMETER CONTROLS TO LOCATIONS THAT WILL REMAIN IN PLACE WHEN PHASE z DEVELOPMENT PLANS /, P r ®.' Oj /+ �/ x / O ` �`(J '0, AREIMPLEMENTED. 8J STABILIZATION OF THE SITE.- I l \I % +� ^ / / L \ - Q � � � � /, � // EXISTING HYDRIC SOIL GENERAL CONSTRUCTION NOTES FOR CONVERSION OF �O • / ` J �" �° 'N.J �_ // (MANTES CHANNERY SILT LOAM) °«' ' �C» �'•�,+•j --- " �••�� /�• U' / PROPOSED STORM DRAIN (SEE SITE PLANS BY ALAN EROSION AND SEDIMENT CONTROL MEASURES TO STORMWATER MANAGEMENT FACILITIES / �, \ /0' �_ �� A ♦ FRANKLIN P.E.) ALL DAMS AND CONSTRUCTED FILL TO BE WITHIN 95% OF MAXIMUM DRY DENSITY AND 2% OF OPTIMUM MOISTURE CONTENT. ALL FILL MATERIAL TO BE APPROVED BY A GEOTECHNICAL ENGINEER. A - - _ r 1 I __ �' BBocKx _ Y (I \�. U (� R // O / ®� �'•• •• ' ' O O PROPOSED CLEAN WATER GEOTECHNICAL ENGINEER IS TO BE PRESENT DURING CONSTRUCTION OF DAMS. - /�' _ ``\ - j.:. ( O J / b / / �� 1 > 7 O DIVERSION ISSUE z. PIPE AND RISER JOINTS ARE TO BE WATERTIGHT WITHIN STORMWATER MANAGEMENT FACILITIES. � `� \ ^^ , � 1 � \/ C';/% �.�/'• 0PROPOSED SUPER SILT FENCE SSF REV # DATE DESCRIPTION #1 3�2/t8 PER COUNTY COMMENTS 3. FOR TEMPORARY SEDIMENT TRAPS OR BASINS WHICH ARE TO BE CONVERTED TO PERMANENT STORMWATER MANAGEMENT FACILITIES; O ,' /�� /-, Q l.i :O _ en P em °, ' �� _ / - �� ,b/ Z�� \+' O #z 4 t6 t8 PER COUNTY COMMENTS CONVERSION IS NOT TO TAKE PLACE UNTIL THE SITE IS STABILIZED, AND PERMISSION HAS BEEN OBTAINED FROM THE COUNTY EROSION `G r °� � J \ , I __ O PROPOSED OUTFACE PROTECTION UP CONTROL INSPECTOR' PHASE 2 STAGE 2 SUPER SILT `,` ,�� _\r _ - i> P ' co _ X� e O \ / / 4. SELECT E&S MEASURES MAY BE IMPLEMENTED DURING PHASE z STAGE t CONSTRUCTION AND THIN MODIFIED DURING STAGE 2 (AND FENCE SHALL REMAIN IN PLACE DURING INTERMEDIATE GRADING -c `� c° ` \ / � I � �� IP PROTOECTION LET 3). PROPOSED TEMPORARY STREAM CROSSINGS ARE DESIGNED AND SHALL BE IMPLEMENTED TO AVOID IMPACTS IN AREAS SHOWN AS PRESERVED ON THE PERMIT APPLICATION. OF BMPS AND DURING FINAL CONSTRUCTION OF BMPS (AS DEPICTED ON THE STORMWATER MANAGEMENT PLANS). SUPER SILT I - J r �, (�) 1 O �,"� \\ o. � O. \ + O - r \ —� � PROPOSED INTERMEDIATE BMP 5. EXISTING ENTRANCES ALONG AND PARALLEL TO STEAMER DRIVE SHALL BE MAINTAINED AND UTILIZED IN PHASE 2 AS NEEDED TO BBacr:.rlwesTl GRADING (STAGE 2 E&S) FENCE SHALL BE REMOVED ONLY 0 \ WHEN THE UPSTREAM �� ACCESS EXISTING STAGING AND STOCKPILE LOCATIONS. 6. CONSTRUCTION ENTRANCES SHALL BE EQUIPPED WITH TRUCK CONTRIBUTING WATERSHED AND BMPS ARE STABILIZED. I '�!l \ V _ �� \� �� ` x -:.... > � \ `✓/ P8 PERMANENT STABILIZATION OF WASH DOWN AREAS ADJACENT TO EXISTING ROADWAYS CLE. STEAMER DRIVE AND ROUTE 25o). _ t \_ \O �• \ `�\ t / \ -\ 11 , `;, 1, PyTB 7.) STREAM BUFFER LIMITS SHALL BE CLEARLY IDENTIFIED AND -- i \�X \ \�= o/ r O `�"" ® \ \ \ __ - e TEMPORARY SCOTT C. BLOSSOM MARKED I THE FIELD WITH SUPER SILT FENCE. , liP v+'� - �\ \ a, - •`, \ CLEAN WATER DIVERSION (CWD) STABILIZATION A Lic. No. 4OSS .P 4i 8.) PHASE z STAGE z EROSION AND SEDIMENT CONTROL PLANS DEPICT \ =s ,, • - \------------------ O INSTALLED DURING STAGE 1 SHALL �Jn W ELEMENTS TO BE IN PLACE PRIOR TO CONVERSION TO PERMANENT BMP FACILITIES AS SHOWN ON THE STORMWATER PLAN. - \ REMAIN IN PLACE UNTIL THE :` .•i•CJ \OUTFALL \ DOWNSTREAM BMPS ARE • $M PROPOSED SEEDING AND EROSION CONTROL MATTING Sg G TONAL 9.) ALL EROSION AND SEDIMENT PERIMETER CONTROLS SHALL REMAIN IN PLACE THROUGHOUT CONSTRUCTION ACTIVITIES AND - ��\`1 `\� \ \ COMPLETED AND STABILIZED AS •` !G� DEPICTED ON STORMWATER REMOVED ONLY WHEN FINAL SITE STABILIZATION IS ACHIEVED. STAGE I CLEAN WATER DIVERSION SHALL BE CONVERTED TO MANAGEMENT PLANS P � Zl \ � _-� O PROPOSED BLOCK LIMITS Job No: 1005 Drawn By: BCE PERMANENT DRAINAGE SWALE AS SHOWN ON GRADING HEREIN AND ON STORMWATER MANAGEMENT ��PS 0 A \ �' -' \ /� - .._ \ \ N Date: 12.04.2017 Checked By: acon c. RIF.E. MASTERPLAN PLANS. REMOVE CWD ONLY AFTER UPSTREAM CONTRIBUTING SITE \ ----- \ i AREA IS STABILIZED AND \ i RECEIVING PERMAMENET SWALE IS A r l� STABILIZED SCALE: 1 INCH = lso FEET T 0r 150' 300' 450' ES — 4 b CONTOUR INTERVAL = 21717 DIVERSION CHANNEL GS3 RAIORALME H& LEGEND nONA METHOD, o _ cw C - 0.50 (ROUGH BARE SqU NOTE: SILT FENCE SHALL NOT BE NOTE: ALL CLEAR WATER DIVERSIONS SHALL USING PLATES 5-1 AND s OF THE VRaNA EROSION AND SEDIMENT CONTROL HANDBOOK. 0 2 RS TI OVERLAND WRHLENGTH OF,OO FT ANDSLOPEFaM-QW4 INSTALLED ACROSS SPILLWAYS. TERMINATE INTO OUTFALL PROTECTION (CL 1 RIP R I VA N N A VILLAGE: R HALLOW SWRH LENGTH OF 358 FT AND SLOPE OF QO68HOURS 0.024 HOURS-2.,5MINUTES RAP MIN LENGTH 20 EROSION AND SEDIMENT US- USINGG NOAAs 1- S. 81NCH S/HOURFREQUENCY DATA SERVER m,w•Jmea�.n..s.Naarw.•rtwaTrofasq. 10 MINUTE 2-YR I - a9e INCHESMOUR 10 MINUTE 10-YR I - 5.251NCHESh10UR ` ` NOTE: ALL SILT FENCE AND SUPER SILT FENCE PROPOSED LIMITS OF DISTURBANCE CONTROL PLAN A-,.2, ACRES SHALL BE A MINIMUM OF g FT FROM STREAM aYR PEAx Flow- aso x a9e x,.z, - 2.4 cFs PEAKFLOW-a50x42G a2 CF3 BANS SITE BENCHMARK 2,.21E 6LOREOFPROPOSED NEL-RISE/RUN - SUOR / ` AMENDMENT 1 AND PHASE II FTHE SEUM7d5FT-Q028 USING PLATE 5-2 OFTHE MR /V EROSIONANDSEDIMENT CONTROL HPNOa001(,V-2]5 Fi5 MINIM MINIMUM FLOW PAEA W - O / V - a2 /275- 1.,8 SOFT DESIGN DEPTH - 2 FT / NOTE: ALL PERIMETER SILT FENCE ADJACENT ASSOC. SURVEY) ASSOC. HURVEYf ALBEMARLE COUNTY, VI RGINIA (d) DESIGN BOTTOM WIDTH (b)- 4 FT TO PRESERVED STREAM CHANNELS SHALL BE EXISTING WETLANDS GIVEN 21 SIDE SLOPE, e- 2 FT x d - 2 FT x 2- 4 FT z - e / e - 4 FT/ 2 FT- z SUPER SILT FENCE AS SHOWN ON DETAIL 4, \ (PER KIRK HUGHES &ASSOC. 0 TRAPEZOIDAL CHANNEL CROSS-SECTONAL AREA W-rox 0 Vz(e^2)) $HEFT IB. BYPASS OFF SURVEY) (4 FT. 2 Fn+[2 x((2 FI 2)1 16 SOFT TRAPEZOIDAL CHANNEL TOP WIDTH =b+(2xtlx Z)=4 FT+R x2 Frx2)-12 FT TRAPEZCDAL CHANNEL HYDRAULIC RADIUS (R) - {0. d)+[Z.Id-2)n/lb+{Rxex[(a-2) 1)^Gmn1 -{(4xzl+[zx R-mn/(4+(Rxzx j(P-)+1)-(1mn> -SITE C _, DRAINAGE AREA TO I \ '� ��^;^- EXISTING STREAM NOTE: ALL CLEAR WATER DIVERSIONS SHALL _ CHANNEL(CLEAR WATER \ TERMINATE INTO OUTFALL PROTECTION (CL i EXISTING O STREAM CHANNEL LIMITS Eo-zTY CHANNEL LINING - VEGETATED WRH PE A MATTING. 3 7 . 4„., T gVERSION (SEE DETML #9 RIP RAP MIN LENGTH 20 FT). (PER KIRK HUGHES &ASSOC. PERMSSIBLEVELOCITV OFo.- 5 (VDOTAPPROVED MATERIALS, AUa1ST20,4, SECTION5n \ SHEETI x ` SURVEY) rvw USING TABLE S-130UF NT- l(h1w Cn)Hpz. ce0.0 p[1rw.23etl^ PTSzTHEuslNcURovcH, ROISI COEFRCIEMN)- 400e4W468A) GKAf ` EXISTTNG POND 'PER ClK HUGHE&AUC. zp z [S^[12s(U2Is.961 zv028^(tml z, e CPACDFW IUR \ ••\ / SURVEY) =99.6 CF5 MAX CARAC IPrVELOCITY-(1.49/n1xlR^R5)Ix15^(tml-11.49 /0.046)x[1.23^(2/3)1x10.04^007 -62Fy DA G(Off) / ` • • 2.16 AC APPROXIMATE DIMENSIONS MINIMUM BOTTOM WIDTH= 4 FT \ \ / �/ ••\ EXISTING TREE LINE 0 MNIMUM DEFTH - z FT MINI MUM �}, �' • • ` (PER KIRK HUGHES &ASSOC. SURVEY) $CE CHANNEPE_z;, AVERAGE CHANNEL SLOPE- Q028 LINING - VEGETATED WITH EC-2 (rREATMEW T PE 1 M "NG) .I • \ `Y •'• OP•• EXISTING ROAD HUGHES &ASSOC. O DIVERSION CHANNEL GSI \ T \ • • UTILIZE TEMPORARY BRIDGE STREAM CROSSING TO SPAN SURVEY)KIRK CALCULATIONS \ STREAM AND AVOID IMPACTS WATERS OF S Engineering Inc. 1101som 9 9 D 1101 ProlesslOnel DtlVe, SUIe G RATIONAL METHOD. O-CIA C - 0.50 (ROUGH BARE SOIL) USING PlATE3 5-1 AND 5-2 OF THE MROINA EROSION AND SEDIMENT CONTROL HANDBOOK. TIOVERLANDWTTH LENGTH OF 10OFTAND SLOPE OF0.15--HOURS S RJURISDICTIONAL •� THE U.S. PERMANENT BRIDGE STRUCTURE (DESIGN PROVIDED ' ' ` UNDER SEPARATE COVER) TO BE INSTALLED IN STAGE 2 AND/OR ♦ •\ �L ''�, IN STAGES AS DEPICTED ON STORMWATER MANAGEMENT PLANS. O EXISTING FENCE (PER KIRK HUGHES &ASSOC. sslonal e, Williamsburg VA 23185 9 P: 757-8764825 TI SHALLOW WITH LENTH OF 522 FT ANO SLOPE OF 0.031- a05, F RS .� •l4 •\ • Tc-0.060 HOURS -ISS MNnE$ \� • ' I 5�� /[ \ \ U61NG NOAAe PRECIPITATION FREQUENCY DATA SERVER O„ Jffid ws.Tae9g ftA pftlsl. 10 MINUTE 2-YR I - a86INCH-OUR (a MNLRE,GSII NACRES .46A A-2.,7ACLOW 0.5-3.9-2.46 ACRES 2-YRPEARFLOW- a50x3.98z - _ I • \ .y . I \ ••\ ` ' AGS3 \ -I • • +\ -SIT- BUILDING O (PER KIRK HUGHES &ASSOC. SURVEY) -.CFS Z ISE &S CFS SUOP PEAK FLOW - CH x 625 n RISE/ SLDREDF RFOPOSEDOHANNEWERO/RUN-,BENME5 T-aD29 USING PLATE 5-2 OF THE MR l V EROSION AND SE QFT CONmOL HPNDBOOI(, V - 275 FT5 N)-O/V-7.2/275-262 SOFT MINIGN \ 0.29 AC `` ` \ \ \ \ ••\ � �� • \ 1 ••\• EXISTING G i l (AREA DESIGN DEPTH (tl)-2FT DEPTH DESIGN BOTTOM WIDTH (b)- 4 FT `\ II / ` \ \ � ••� � (PER KIRK HUGHES &ASSOC. UGHES& O GIVEN z•1 SIDE SLOPE e-zFT. tl-zFT. z-a Fr 1-a/e-4ET/z ET EL RAREzaDAL CHANNEL CRoss-SECTIONAL AREA W-roxm+2x(e^2)I � �A � � � •V � \ •• SURVEY) � \ \ \ RAF¢gDAL OHANNELTOP VNDTII-b+ (4FTx2FT) 2x(QFT)-2)I 16SQFT T R-Z)-4Fr+Rxz-4-12FTEXISTING TRAREzaDAL cwwNEL HVDRAuuc RADIUS(R)-{roxa)+ax(e^�))/ro+[Rxex[(a"zl+n-mm�) \ \ `\ ` \ \ j \ \ �/ •\ STREAM BUFFER (PER ALBEMARLE COUNTY) . X -{laxrt+RxR-av/(a+(Rx2xkR-a+n^pm111 �.. � \ \� / \ CHPNNEL LINING_ VERMSEIBUEVEUO62TrPQGAOFTNG > \ \ `\ \.• , j:- / \ ,,\ N` CVDMAIBLEVELOCRYRF ,A0FT5 (VDOT APPROVED MATERIALS AUGUST 2014. SECTION Sn (MIP'./A-Wz.NrprvarlotorW,gnesstesun .Mtale'IaWApproeU_LI9sPM/ USING TABLE S-13 of THE VE : RETARDAND qR--I N - c ` , \� ; \ W \ ' •\ PROPOSED DIVERSION DIKE O \ .E-F USING PLATE S290F THE VESCH, ROUGHNESS COEFRgENTIn)-0.D98 MAX CAPACT'FLOW=,1.49/n)zIR^R5➢z[5^(1 mIxA=(ln9/QOgB)x[1.23^(2/.SJz[0.09^(1m7x16 \ ` ('1 BLOIJKE ` ••\ TPE MAXCAPACT`VELOgTY_(149/n)xIR^R511 x16^(tml-11 p8/0.0481xI123^(2r371x[0.0Z9^11211 - DIMENSIONSA� / \ / \ �+ V I ••\ a PRoeosEDCLEnawATER CWD O -� KEY PLAN MINIMUM BOTTOM WIDTH-4FT MINIMUM DEPTH-2FT MINIMUMSIDESLOFE-2:, \. . ` ` f \ ` \ / MAINTAIN DIVERSION DIKES FROM PHASE I ••\ 1 �•\ DNERSION AVERAGE CHANNEL SLOPE-a029 LINING- VEGETATED WITH E0.2 (TREATMENTTYPE 1 MATTING) EROSION AND SEDIMENT CONTROL PLANS IN PLACE ` ` 1 DURING GRADING AND CONSTRUCTION ACTIVITIES DA GS4 \ ASSOCIATED WITH BLOCK D AND F. DIVERSION \ ` ` PROPOSED SUPER SILT FENCE $SF RIGHT-OF-WAY DIVERSION GS4 CALCULATIONS: LEADS TO SEDIMENT BASIN CS 2 TO REMAIN IN BLOCK G DA GS3 0.81 AC ••� `+ ` 0.92 AC _- \ ••\. �• PLACE DURING PHASE 2 CONSTRUCTION ACT ES. RATIONAL METHOD, O-CIA O-o.26(4XEATES LANWSET USING PLATES 5-1 OF THE EROSION AND SEGMENT CONTROL HAND�OK, ` SEDIMENT BASIN CS2 SHALL BE CONVERTED TO `y ` ` •\ /: I� ••I \ ` •.\ FOREBAY AND PSTAGE LANS AS ENT CONTROL EROSION AND SEDIMENT CONTROL PLANS AND PROPOSED STOCKPILE WITH $P FT AND n OVERLANDWITHLENTTHO%F 0.RTAN SLOPE LE GT 066- Tt ` ` ` '� ASSOCIATED STORM WATER MANAGEMENT PLANS I PERIMETER CONTROLS 007E FR6 SHALLOW WITH LENGTH OF,,, FT AND SLOPE OFF 0.0 - 0.001 HOURS PEOFQ TI OHANNELO RH LENGTH OF 585.6 FTAND SLOPE OF Q053- 0.018 HOURS (STAGE 3) US NG 2HQURS-,as,MNFREs USING NOPA6 FREgFRATION FREQUENCY DATA SERVER(TIprJPxlsc.nwsrgee.govRgsG/pftls�, ,0 MINUTE - I i a96 NOHESROUR 10MNUIE,O-YRi-5.251NCHES R \ z ` 3 7 O - ` I' / PROPOSED CONSTRUCTION O ENTRANCE CE A-2.J7 ACRES 2-YR PEAK FLOW - 0.26 x a96 x 217- 26J CFS MAINTAIN CONSTRUCTION ACCESS AND EXTEND 10-vR PEAK FLOW-026x 625 x 277-3.78 CFS SWPEOFPROPOSEDCHANNEL-msE/RUN-2a FT/663FT-aoa3 CONSTRUCTION ENTRANCES FROM PHASE I EROSION AND SEDIMENT CONTROL PLANS DURING , ' ` DV 11V]TIESP� DV - - I USING-E-2-EVIRQMAEROMONANDSEgMENTCONTROL DD .V-a3FT5 MINIMUMFLOWAREAW-Q/V-a8/a3-,.155E , GRADINGANDWITH ASSOCIATED WITH PHASE 2. CE2 SHALL BE UTILIZED - ♦ PHAUC2. CE2S SHALL \ SF L PROPOSED TEMPORARY TSC DESIGN DEPTH (d) - 2 FT DESIGN BOTTOM WIDTH (b)-4 FT UNTIL CE 3 AND CE 4 ARE IN PLACE AND SITE \ CONTRACTOR DE -MOBILIZES FROM PHASE I SITE STREAM CROSSING GIVEN 21SIDE SERIF»_ 2 FT.e_ 2 FT. 2_4 Z e/e AFT/2FT 2 TRAPEZCIOUCHANNELCROS Ec ONUAREA(A)-roxd,+[zx(d-2)] AREAS. + / oP - bE `... + � - PROPOSED SEDIMENT TRAP ST ISSUE TRAPF2DIOPL CHANNEL TOP WIDTH_b+-wFTxzFn+R x(R Fn"2)I-,esQFT AFT+Rx2 FTx TRAPEZOIDAL CHANNEL HYDRAULIC RADIUS0)-(Nxe)+ 2t 12 Ff [zx(e^211/ro+(2.2102-2)+n"Omm {14TTING. R^2)IJ/(4+{Rx2 xl(R^2)+11^(tm11] CHANNEL urvwc_vscErATED WITH EazTYPEArw1rnNG •. K + �\ '. \ ; DA GS7 ` \� ..� zn Ac �+ Y ` SP / ,� //,� PROPOSED SEDIMENT BASIN $$ REV # DATE DESCRIPTION #1 3/2/18 PER COUNTY COMMENTS a2 411618 PERCOUNTYCOMMENTS PERMISSIBLE VELOCITY OF G. .O FTIS (VDOT APPROVED MATERIALS, AUQUST2014, SECTION 57) - (bllMfHEVESCH, PETARDANDECL2Ye�CATIOnaleA9NATM�'eT1_UaQif USING TABLE 5-,30F THE VESCH, ROUGH" NCE CLASSIRCATIOry - C SSF ' �` y l USING PLATE 5-280F THE VESCH, ROUGHNESS COEFRg-("I - - MAx cAPAcm Flow-u.49/n)xIRNMI]xls^Dm1.A-u.49/a0a6)x[,.23^R/a)Ix lGM-(1m)x16 -12a4 cvs ' DP `Y �+ 1 DV ` 4 / // PROPOSED CONSTRUCTION CRS MAX CAPACITY VELOCITY -(OTI.),[R^(25)]x lrnml-a.49loo )lxn.23^(VUA, A0a3^nml . .]FT5 / / \ /* ` SEgMENTTRAP GS3 / \ ♦ I ROAD STABILIZATION DIMENSIONS MINIMUM BOTTOM WIDTH- 4 FT MNIMUM DEPTH - 2 Fr MINIMUM SIDE SLOPE-2:, ` I \ / / / CE2 \� / `♦. ♦ I SSF , PRO POSED CONSTRUCTION ACCESS ROUTE (USE DUST O O AVERAGE CHANNEL SLOPE -a043 /' UV ` ♦ ♦ / CONTROL PER VESCH 3.39) VEGETATED UNING- WITHEC-2 UEATMENT RTYPE 1 MATTING) DV / ` ♦ ♦ / SEDIMENT TRAP GS1 BLOCK F �" / ` ♦ ♦ I - O PROPOSED BLOCK LIMITS DA-2.17A ACRES D I -RAGE -,34 CY PER ACRE - 329.B CY- 8900.3 OF REQUIR]ACRES+Q29 ACRES -R ACRE IF VOLUME T VOLUME 1 - 0.65 x NORMAL POOL SURFACE AREA, x OF I DEPTH IFVOLUHE E2-[(IRED ORMAL POOL RFACEAREA R-CRESTS 85x4 REA/21 B9 SF IF vowME z-IINORrnnL Pool SURFACE AREA+CREST suRFACE ]wEtq/zlxDRr DEPTH SURFACE AREA-[2 z(a 450 SF/2 F11] 1155.8 SF-3299 SF THE MINIMUM MINIMUM FLOW PATH LENGTH JO FT FLLOW PATH �' - x ♦s xL�( I / Q / ` /. _ \\ PyT H Op �O C 2 EFFECTVE WIDTH - NORMAL POOL S LENA ARFA / LENGTH -1- 7011& - 16.5 FT MINIMUM LENGTH TO WIDTH RATIO-LENGTH/EFFECTIVE VADTH-]0/1a5-d'l DIMENSIONS: // \ -_ ` + /�� PHASE, AVERSIONS TO REMAIN IN ` PLACE FOR PHASE 2 STAGE 1 E&S. \ 'x \\ $ •P5 � SCOW C. BLOSSOM ^y LTC. No. 40287 NORMAL POOL SUREACEARFA-,158 SF ELEVAnON-350 \\✓ ��i i�.. •\\ - e,\\ / A {E N MINIMUM FLOW VATONLENGTH -70 FT MINIMUM EXCAVATION DEPTH 4 FT, BOl"rCM ELEVATION= 346 WET BANHEIGHTP W11. WEIR -3cIS+SI .IN-.' BERM TD,-ATIscT IDTH ./ .,' / �' s lG\ ONAL BERM UM WGR 2ET ELEVATION-652 MI NIMUMWEHLENGTH _BZOA_ex2.,7_,3,O ET M NIMUM EXCAVATION SIDE 9LOPE-21 MNIMUM EMBANKMENT SIDE STORE _3.t /I _ BLOCKD •\ CEl Y � \= � . / \ OP At ♦� SEDIMENT TRAP GS3 /� y _ y / �� Job No: 1005 Drawn By. BCE CALCULATIONS: x \ t Dale: 12.04.2017 Checked By. Spn C. Hpc- P,E, DA.1Z ACRES REQUIRED STORAGE-134 CY PER ACRE-1821 CY-0.3022 CF .� sr \ x E8S STAGE 1: BLOCK G x IF VOLUME i - 0.85 NORMAL POOL 6URFACEAREA x vvET DEPTH. THE PEOUIREO NORMAL RCOL SURFACE AREA- 2,191.1 CF /(0.85 x 4 Fn - 644,46E 2- IFVOLUMEINOMAIL TH PCa SURFACEAREA+ CREST SURFACEARFW/2).DRYDEP / ,`UBLIZESTREAM CROSSING TO CROSS STREAM QMPACTS TO SEDIMENT TRAP G51 " / O I / JURISDICTIONAL WATERS OF THE U.S. PREVIOUSLY ,,. PERMITTEDANDMIATED FOR UNDER SEPARATE COVER TIG •,� / , THE REQUIREDORESTSURFACEAREA-I2xR191.1OF/2Fn)-644SF-t547SF MINIMUM FLOW PATH LENGTH- 40 FT EFFECTNE WIDTH-NORMALP SURFACEAREA/LENGTH-644/40-16.1FT (SEE DETAIL 7, SHEET IO FOR TSC CULVERT SIZING). SCALE: / I O •,\ ,I DV / I/ IINCH = OFEET 5 MINMUM LENGTH TO WIDTH RATIO-LENGTH/EFFECTIVE WIDTH -40/16.,-25:1 DIMENSIONS: ' SEE TYPICALDETAIL FOR SEDIMENT TRAP A$STAGE I SSF \ ,•\ \GRADING IS NOT DEPICTED ON ES-7 CROSS SECTION NORMAL POOLBURFACEAREA-6M 6F.ELEVATICH-358 MINMUMFLOWPATHLENGTH-40 FT \ - - I OI 5OI lOOT ZGGT MIN MUM EXCAVATION DEPTH- 4 FT, BOTTOM ELEVATION. 352 WET BANK HEIGHT- 4 FT, ELEVATION- SEE MINIMUMBERMTOPW1DTH-3FT •,� CONTOUR / / I \ INTERVAL =2FT J BERM HEIGHT- 2 FT. ELEVATION- 358 MINMUM WEIR LENGTH -BxpA-Bn1.21-J.3 FT MINMUM EXCANKMS- SIDE SLOPE- a1 1DEELa£_2:, MINMUM EMBANKMENT \ AO / // / ----� �y \ PHASE 2: STAGE 1 EROSION AND SEDIMENT CONTROL PLAN (BLOCK F AND G) eyrsu(�u�Vm u,oi%1suus Rrm.eN- Mev.RslTnVro=RraireRa_ESC_REV fta grya 13. Mta at tb.tslLavout 5 Es Rx G(t) d� LEGEND PHASE 2: STAGE 2, BLOCK F AND G SUMMARY RcIVANNA VILLAGE: THIS PHASE 2 STAGE 2 EROSION AND SEDIMENT CONTROL PLAN FOR RIVANNA VILLAGE BLACK G INCLUDES STABILIZATION OF UPLAND GRADED AREAS UPON REACHING SITE GRADES. STAGE 2 _ PROPOSED LIMITS OF DISTURBANCE LOD EROSION AND SEDIMENT CONTROL PLAN PRACTICES SHALL BE IN PLACE UPON COMPLETION OF ROAD CONSTRUCTION AND INSTALLATION OF STORM DRAINAGE INFRASTRUCTURE. THE STAGE 2 EROSION AND SEDIMENT _ - -" — - SITE BENCHMARK CONTROL PLAN FOR BLACK G INCLUDES THE FOLLOWING MEASURES: O (PER ROUDABUSH, GALE AND ASSOC. SURVEY) AMENDMENT 1 AND PHASE II ALBEMARLE COUNTY, V I RGI N IA iJ INSTALLATION OF INLET PROTECTION AT ALL INSTALLED STORM DRAIN INLETS i 0 EXISTING WETLANDS (PER KIRK HUGHES & ASSOC. 2J INSTALLATION OF OUTFALL PROTECTION AT ALL STORM SURVEY) DRAINAGE OUTFALLS..,..." / EXISTING STREAM CHANNEL LIMITS 3.) ROUGH GRADING OF PROPOSED PERMANENT BMPS TO APPROXIMATE DESIGN ELEVATIONS, AND PERMANENTSURVEY) / J' (PER KIRK HUGHES & ASSOC. STABILIZATION OF PERIMETER GRADES. 4.) INSTALLATION OF BMP RISER STRUCTURES (PRINCIPAL OUTFALIS) AS SPECIFIED ON THE STORMWATER MANAGEMENT PLANS (STAGE 3). DO NOT INSTALL ENGINEERED SOIL MEDIA, DRAINS, OR FINAL BIORETENTION PLANTING MATERIALS. i. `4 SEE STORMWATER MANAGEMENT PLANS FOR ADDITIONAL BMP Gi, G. AND G3 DESIGN AND SPECIFICATIONS. STAGE. INCLUDES ONLY ROUGH GRADING TO APPROXIMATE FINISHED BMP DESIGN ELEVATIONS A FACILITATE OUTFACE FROM STORM DRAINAGE INFRASTRUCTURE AND PLACEMENT OF STABILIZED OUTFALL. RISERS SHALL BE INSTALLED AS A COMPONENT OF STAGE 2. DO NOT INSTALL UNDERDRAINS NOR WO EXISTING POND RVIEY) HUGHES & ASSOC. SURVEY) APPROXIMATE EXISTING TREE LINE C E ENGINEERED SOIL MEDIA UNTIL UPLAND CONTRIBUTING DRAINAGE 5.) SITE LANDSCAPING OUTSIDE OF PROPOSED PERMANENT BMPS AREA IS COMPLETELY STABILIZED, AS SHOWN ON STAGE 3 MAY BE INSTALLED PER THE LANDSCAPE PLANS (PROVIDED UNDER STORMWATER MANAGEMENT PLANS. HUGHES & ASSOC. PER SURVEY) SURVEY) COVER) SEPARATE COVER)ONLYAS APPROVED BY THE LANDSCAPE ARCHITECT. �/ _ � `� EXISTING ROAD (PER KIRK HUGHES & ASSOC. Blossom Consulting and Engineering Inc. 6.) CONVERSION OF THE TEMPORARY RIGHT OF WAY DIVERSION TO �� SURVEY A PERMANENT SWAL.E AS SHOWN ON THE SITE GRADING PLANS AND STABILIZATION. �� I`' •` ( EXISTING FENCE (PER KIRK HUGHES & ASSOC. 1101 Professonal Drive, Suite Williamsburg VA 23185 p 757870-4825 7J INSTALLATION OF EMERGENCY SPILLWAYS AT EACH BMP LOCATION (Gt, G2, AND G3). �\ f,. \\ `� •��' SURVEY 8.) PHASE 2 STAGE 2 EROSION AND SEDIMENT CONTROL PLANS DEPICT ELEMENTS TO BE IN PLACE PRIOR TO CONVERSION TO ' \� y/ — '`. EXIBTING BUILDING (PER KIRK HUGHES & ASSOC. SURVEY) \ \ PERMANENT BMP FACILITIES AS SHOWN ON THE STORMWATER PLAN. 9.) ALL EROSION AND SEDIMENT PERIMETER CONTROLS SHALL REMAIN IN PLACE THROUGHOUT CONSTRUCTION ACTIVITIES AND '�\ ,`•.`' IP I O EXISTING POWER POLE (PER KIRK HUGHES & ASSOC. SURVEY) REMOVED ONLY WHEN FINAL SITE STABILIZATION IS ACHIEVED. � l• `-' / SSF Ot,/ \ �•` RT L I EXIBTING SIGN ( PER KIRKS & ASSOC. SURVEY) —STING CONTOURS (PER KIRK HUGHES& ASSOC.� SURVEY) \ '\�,- \ I BLOCK �. �` �P '� �• I EXISTINGSTREAMBUFFER (PER ALBEMARLE COUNTS') ' 1\__j ; O PROPOSED LOTS (STABILIZED KEY PLAN A / ---� UPON COMPLETION OF PHASE 2) i BLOCKG �- TS �� \I / W D `�' I .`. • i O PROPOSED LANDSCAPE PLANTINGS (SEE LANDSCAPE PLANS) / ' \ PROPOSED STORM DRAIN (SEE SITE PLANS BYALAN FRANK IN P.E.) DED SEE CIVILSITE PLANS PROVIBYALAN FRANK IN, P.E. FOR ROAD DESIGN AND \ )),(� -\ O - - - IP SSF J PROPOSED CLEAR WATER DIVERSION CWD ISSUE STORMWATERINFRASTRUCTUREDESIGN. SSF �� OP I O PROPOSEDSUPERSILTFENCE SSF PROPOSED OUTFALL REV # DATE DESCRIPTION #i 3 z 18 PER COUNTY COMMENTS #2 q t6 t8 PER COUNTY COMMENTS PS ( ,I BM BMP G3 PROTECTION OP _ \ - �P � OP 1 '0 IP PROPOSED INLET PROTECTION E2 � — BM BMP G2 � - � PROPOSED INTERMEDIATE BMP •• \ GRADING STAGE 2 F.&S �� ------- BLOCK F �� SSF �- OP ` I P �� `. • . / OP , �" U t / P t PS TS PERMANENT STABILIZATION TEMPORARY STABILIZATION KyTH Op o c' 2 SC BLOSSOM a 1 i IP � hS PROPOSED SEEDING AND EROSION CONTROL Lic. No. 40287 V \I MATTING ONAL NOTE: ALL PERIMETER SILT FENCE ADJACENT TO PRESERVED STREAM CHANNELS SHALL BE SUPER SILT FENCE AS SHOWN ON DETAIL 4, SHEET 18. N CE1 BLOCKD IP GP O " J IP O / I I „ \ OP A/ IP ,n pI/ P UT .. - • �� IP BM ��j O SSF \�. SSF Job No: 1005 Drawn By: BCE Date: 12.04.2017 Checked By: scon c. aiossom, a.e. EIS STAGE 2: BLOCK G -, P �y� TS IP SCALE: T INCH = go FEET Or 50' 100, 200' — ES 6CONTOUR AND AND PHASE 2: STAGE 2 EROSION SEDIMENT CONTROL PLAN (BLOCK F G) INTERVAL FT = 2 a o�� E .re . dM.�,� Davos �a �e , Es aEw�1.,lk,,1,—.,,,,41uro 1E 1ken, 366 EROPOSBDGRAOR RIVANNA VILLAGE: 364 PROPOSED STABILIZATION EROSION AND SEDIMENT DIVERSION SWALES GS2, GS3, SEEDING AND EGZ MATTING 362 rPRO-ED 12-PT SIDEWALK CONTROL PLAN 344 DIMPNSIONB TOP OF BERM / TOPW[DTH-" FL 360 3s' RCP RISER (INSIDE DIA. HLEV. 356.o ITr WITH METALTRASHRACKAND AMENDMENT I AND PHASE 11 MAX. DEPTH - z.o 1T. 343 ANTI-vORTEXPI—E RIM ELEVATION=353.o FT ALBEMARLE COUNTY, VIRGINIA 12.' ESI 14 358 3 5" ORIFICE @ RLBV. 35z.5 FT 34z DEFACE ELEV. 35— FT EPI W 54 o FT, BOT Io 356 y WIDTH=�o FT 341 .o n-r,-� �> 40' C A N GRADS' _ ___ PROPOSEDSTESSHEET C P CI 364 \ FILL BEE NOTIS SHEET � SWM-zo 3400 5 1D 15 zo DISTANCE (FE.) 352 TYPICAL DIVERSION SWALE CROSS-SECTION _ 350 vDOT ESI VERTICAL SCALE: 1" = 2' HORIZONTAL SCALE: 1" = 5' SCE 348 GP U°4s%� NOTE: \ \ SEE LINING CALCULATIONS PROVIDED ON STAGE 1 IS PLAN FOR PROPOSED CHANNEL LINING. 346 USINv. 348.o Fr ALL DIVERSIONS ARE ADEQUATE AND'OVER-SIZEDIN CONSIDERATION OF TYPICAL DSINV. 346.o CONCRETE FILLE Fr Blossom Consulting ri and Engineering Inc. 'BUCKET DIMENSIONS.. MSERBASE(z'MINJ _] 344 1109 Professional Drive, Suite G INSTALL coxcRE / Williamsburg 23185 CRADLEALONG CONDUIT 25VA p: 757-870�825 342 (SEE DETAIL 3. THISSE EET) STABILIZED OUTEALI) 340 (CLASS I RIPRAP, MIN. .-FT DEPTH) 338 0+00 0+10 0+20 0+30 0+40 0+50 0+60 0+70 0+80 0+90 1+00 1+10 1+20 1+30 1+40 1+50 1+60 1+70 1+80 1+90 CROSS SECTION A -A' (GSi) VERTICAL SCALE: 1"=4' HORIZONTAL SCALE 1"=20 372 370 PROPOSED GRADE PROPOSED STABILIZATION 368 SEBDINGANDEC-s MATEING TOP OF BE 366 ELEV =36z.o FT 31' RCP RISER (INSIDE DIA. KEY PLAN PROPOSED STRUCCURAL WI THMETALTRASHRACKAND 364 FILL SEENOTESSHEET ANTIVORTEXPLATE SWM-2o RIM ELEVATION=359.o FT SPILL-WEIRCREST 3.5" ORIFICE @ELEV. 35a.5 FT ELEV. 36u.0 FT, BOTTOM WIDTH = Lo FT 362 DRFACEELEV. 358.o FT B' J y 360 - — — e 358 ___ : vDOTESs 356 08') 354 44 ISSUE ♦ — _ 352 --------- EXISTING G E USINV. 354.OFT REV # DATE DESCRIPTION DSO' � IT 350 INSTALL CONERE #1 3/z/18 PER COUNTY COMMENTS CRADLEALONGCONDUIT #z q D5 18 PER COUNTY COMMENTS 348 (SEE DETAIL 3, THIS SHEET) TAGS, SEDITo TRAP 346 sTA3[LIZED auTF (CLASS I RIPRAP, IN. s-FT DEPTH) 344 0+00 0+10 0+20 0+30 0+40 0+50 0+60 0+70 0+80 0+90 1+00 1+10 1+20 1+30 1+40 1+50 1+60 CROSS SECTION B-B' (GS3) VERTICAL SCALE: I"=4' HORIZONTAL SCALE 1"=20 o��D SCOLi�Po�S` Job No: 1005 Drawn By: BCE Date: 12.04.2017 Checked By: scon C. Blossom, P.E. BLOCK G CROSS SECTIONS ES-7 m � .Irmpcu�oos arvsn�nEvnx.gnana nnaye'�•V-+owns arvsnnaaHz esc aevx.m.al3�iilMr,x. xo,es�,,:ssl�sw�il eiwc(zs) DIVERSION CHANNELS CALCULATIONS E D -=cw USNG NOAAS PRECIPTAnoN FREQUENCY DATA SERVER (http:/mbsc.rnvs noee.ern' PA PNPA Es ouR 10 MN_E,o-YRI-Szs INCHESIHOUR USING VDOT DRAINAGE MANUAL FOR ALBEMARLE COUNTY, INrENSI (i)=B/((N+D) ^ E) 95 BS 0 0.5 IS1 a C �ACRES s C 0 (ROUGH BARE SOIL) USING PLATES 5-1 AND SL2 OF THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK LENGTH 11 1 AND STIFF 11 " HE TT SHALLOW FLOW WITH LENGTH of 441..55 FT AND SLOPE of o.oa1 I-0.01s HOURS TP = 0 039 HOURS = 2 31 MINUTES 1(10-YR) = 7.741NMR -YR PEAK FLOW- O.SOx3.98x255-51 CPS -5CFS 10 YR PEAK FLOW-0.s0 x 7.74x2.s1-9a cFs-15EFs SLOPE OF PROPOSED CHANNEL RISE /RUN 25.3 PT/M5 PT 0040 MAX PERM SS BLE VELOC TY OF EG 2 MATT NG 4 FPS (USE 2 7 FPS FOR COMPUTATIONS) MNMUM FLOWAREA(A) Q/M 2 1B/7 373E IS1 b A=1.48ACRES C = osoUS NG (ROUGH BARE sOILo F THE DIMENT L OVERLANDWITHLENGTH OF 1 OOVFT AIND SLOPE OF 089NIA EROSION AND SE0.012 HOURS CONTROL HANDBOOK, Tt SHALLOW WITH LENGTH OF 107 FT AND SLOPE OF 0122 - 0.005 HOURS T, CHANNEL WITH LENGTH OF 263.6 ET AND SLOPE OF 049 = 008 HOURS I (10-YR)258. 17INM;R . 8 MINUTES 2-YYR R PE LOW POSsS x 5.25 x,44R- 39 cFs 10-YR PEAK FLOW - 0S0 x 8.17 x 1.48 - 6.0 CFS SLOPEOFPROPOSEDCHANNEL RSE/RUN 22FT/475FT=0.046 MPX. PERMISSIBLE VELOCITY OF EC-2 MATTING 4 FPS (USE 2.7 FPS FOR COMPUTATIONS) MINIMUM FLOW AREA (A) Q/v 6/27 22 BE IS1 C A 2.91 + 2.95 5.8B ACRES CS G PLATES 5 BARE 80 LOF THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK AND SLOPE - UP IT TI SHALLOW WRHHLENGTH OF 388 FT AND SLOPE OF 0057 0.028 HOURS T, CHANNEL WITH LENGTH OF 356.3 FT AND SLOPE OF 008 026 HOURS "(10 YR)706.95 NMRHDURS 43 M NUTES 1C-YR PEAK FLOOW - 0.50 x 6.95 z 5:06 - 20� 4 CFS SLOPE OF PROPOSED CHANNEL = RISE / RUN = 11 FT / 731 FT = 0.015 MAX PERM 33 BLE VF NI 4 FPS (USE 27 FPS FOR COMPUTATON3) MNMUM FLOW AB_ D/v 20.a/2.7 7.58E ASZ d 0550+278 5.33ACRES c (ROUGH FARE SOIL) USING PLATES 5-1 AND 5-2 OF THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK, IT OVERLAND WITH LENGTH OF 100 FT ANG SLOPE OF 0.05- 0.013 HOURS T, SHALLOW WITH LENGTH OF 289 FT AND SLOPE OF 0 055 = 0.021 HOURS T1 CHANNEL WTH LENG, OF111.3 ET AND SLOPE OP.022=.rl s HOURS HOUR. i(I -YR)5 7.38IN- OW 05O x 3.98 x633 10.6 CFS 10YVR PEAK FLLOW OSO x 5.25x 533 14 CF5 10YR PEAK FLOW 0.50 x 7.38x 5.33 197 CFS SLOPE OF PROPOSED CHANNEL RISE /RUN 15 FT/556 FT 0026 MAX RM SS BLE VELOCI OF EC-2 MATTING 4 FPS (USE 2.7 FPS FOR COMPUTATIONS) MINIMUM FLOW AREA (A) 0/V 19.7/2.7 7.35E AS? CS O50(LARES5 BARE 50 LOF THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK LENGTH OF 1 0' PLANE STEEL OF "' 11 HOURS T1 SHALLOW WITHHLENGTH OF 667 FTAro 0 SLOPE OF0 P0004 HOURS Tt QHANNELWTH LENGTH OF468.6 PTAND SLOPE OF 029 0.018HOURS , (10 0a)337.DLESE 198 M NUTEs - FLOW=0.S0x3.98x295=59CFS jCyR_K10-YRPEAKFLoW-0:5ax 9:z5„ �Fs SLOPE OF PROPOSED CHANNEL _ RISE/RUN-19FT/624 FT _ 0.036 MAX EWC1E 1MATTING Ps (usEz7 FPS FOR COMT MNIMUMFLOWARAo/v17 3 BE IS1 g o so ACRES c (ROUGH FARE BOIL) USING PLATES 5-1 AND 5-2 OF THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK, IT OVERLAND WITH LENGTH OF 100 FT ANG SLOPE OF 0.09- 0.010 HOURS T1 CHANNEL WTHSHALLOW WfTH LENGTH OF 52 4 FT AND SLOPE OF 0.076 0 003 HOURS (10 YR) 8-INMR TE or_ 1 17 M NUTES OW-D.5o x 3.96 x 0.81 -1.8 CFS 10yVR PEAK FLFLOW - O.SO x 5.25 x OSI - 2.1 CFS 10-YR PEAK FLOW - 0.50 x 8.34 x 0.81 - 3 4 CFS SLOPE OF PROPOSED CHANNEL - RISE / RUN -1 e FT/ 306.5 FT - 0.CBS MAX RM SS BLE VELOCI OF EC-2 MATTING - 4 FPS (USE 2.7 FPS FOR COMPUTATIONS) MINIMUM FLOW AREA (A) Q/V 3.4/2.7 126 SF AS2 % ACRES c 0.50 (ROUGH BARE SOIy USING PLATES 5-1 AND 5-2 OF THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK T, OVERLAND WITH LENGTH OF 100 FT AND SLOPE OF 0.09= 0.010 HOURS LOPE F Ti CHANNIH-LOEL/ WIITTH LENGTH OF 25WH LENGTH OF 147 FT�AND SLOPE OF 0008 0.008 HOURS TE - 0.020 HOURS - 1.17 MINUTES (10 YR) 8.34 INME 2YR PEAK FLOW O50.3.98.599 11.9 CFS 10YR1EAKFL1W O.SOx525x599 157CFS SLOPE OF PROPOSED CHANNEL = RISE / RUN -19 FT/ 330 FT = 0 058 MAX. PERMISSIBLE VELOCITY OF EC-2 MATTING - 4 FPS (USE 2.7 FPS FOR COMPUTATIONS) MINIMUM FLOW AREA (A) = Q / V = 3 3 /27 =1 2 SF DIVERSION DESIGN DIMENSIONS TRAPEX0DAL CHANNEL OROBSSECTONAL AREA (A) (bxd)+[zx(a^2)I I4 FT x 2 FT) + [2) - FD^2)1 16 SF TRAPEZOIGAL CHANNEL HYDRAULIC b+2xbx 9FT+2x2FTx2 1R2. TRAPEZOIDAL CHANNEL HYDRAULIC RADIUS (R)={[bxtl)+RxItl^2)p 11b+(2 xtlxr( 2) +1)^O EIII 3 LL CHANNEL LINING = VEGETATED WITH EC-2 MATTING 5 (VCOT APPROVED MATERIALS, AUGUST 2014, SECTION 57) mttp //WWW Mfg f18tlP1 bus shemurcesMe[enes/Apprwetl LSs ptlry USING TABLE513 OF FEE VRSCH RETNREANCE CLASSIFICATION C ©©©©©©© NOTE: ALL CLEAR WATER DIVERSIONS SHALL TERMINATE INTO OUTFALL PROTECTION (CL I RIP RAP MIN LENGTH 20 FT). NOTE: ALL SILT FENCE AND SUPER SILT FENCE SHALL BE A MINIMUM OF 5 FT FROM STREAM BANKS. _. MAINTAIN BASE FLOW IN ADJACENT CHANNEL DURING CONSTRUCTION ACTIVITIES ASSOCIATED WITH BLACK I. GRADE PROPOSED SEDIMENT BASIN TO PROPOSED DIMENSIONS SHOWN HEREIN AFTER DEWATERING. INSTALL TEMPORARY CMP RISER PER VESCH STANDARD AND SPECIFICATIONS (TO BE REMOVED AND REPLACED UPON CONVERSION TO PERMANENT BMP(STAGE 2 AND STAGE 3) DV \ / / \ \ \ 1-1 NOTES AND CONSTRUCTION SEQUENCE FINAL LOCATION OF ALL CONSTRUCTION ACCESS & PROPOSED STAGING & STOCKPILE LOCATIONS TO BE APPROVED AND CONFIRMED WITH ALBEMARLE COUNTY AND PROPERTY OWNER PRIOR TO CONSTRUCTION AND IS THE RESPONSIBILITY OF THE CONTRACTOR TO COORDINATE. 1. CONTRACTOR TO PERFORM ROUGH GRADING WHERE SHOWN ON THIS SHEET. 2. ALL DENUDED OR DISTURBED AREAS TO BE PERMANENTLY STABILIZED IMMEDIATELY AFTER FINAL GRADE. 1 MAINTAIN BASE FLAW IN ADJACENT CHANNEL DURING �' f CONSTRUCTION ACTIVITIES ASSOCIATED WITH BLACK I. GRADE PROPOSED SEDIMENT BASIN TO PROPOSED r \ J DIMENSIONS SHOWN HEREIN. INSTALL PERMANENT I \ RCP RISER PER STAGE 3 STORMWATER MANAGEMENT \ PLANSAND MODIFY FOR EROSION AND SEDIMENT j \ CONTROL AS SHOWN ON DETAIL 7, SHEET>_9. / LF CE4 ' O E3 ' DV o4:�a v DV 01 DV / ♦ �. O PROPOSED BAFFLE TO PREVENT SHORT CIRCUITING (SEE DETAIL5 SHEETT9) S I �I GP / + TJS1 + / NOTE: SILT FENCE SHALL NOT BE F / INSTALLED ACROSS SPILLWAYS. PHASE 2: STAGE 1 EROSION AND SEDIMENT CONTROL PLAN (BLOCK I AND J) IF TL LT BE ,, I y \� Sea-/ / / / SEDIMENT BASIN 11 CALCULATIONS'. DA - 11.9 ACRES REQUIREG STORAGE = 134 CV PER ACRE = 1595 CV INII - Co. RED NORMALPCOLS�RFACE AREA R�73 CY/0411 Tx5 64 SF EVOLUME2 [(NORMAL POOL SURFACE AREA+ CREST SURFACE AREA)14 x DRY DEPTH THE REQUIRED CREST SURFACE AREA [2x R97.3CV/2FRI 10764SF 0763SF MIN FFECTIVEWDTHA NORMAL POOL SURFACE AREA 10764SF/140=77 FT MINIMUM LENGTH TO WIDTH RATIO =LENGTH /EFFECTIVE WIDTH -140 / 77 = 1.81 RAEONAL 60 METHOD, Q = CIA (ROUGH BARE SOIL) FROM DIVERSION CHANNEL 0 c CALCULATIONS, TP = MINUTEPRECIPITATIONusING NOAAsPRECIPITFREQUENCYoN FREQUENCY DATA SERVER mnP:/maso.nv9.Roaa.9wmtlauPlasn 0 MINUTE 2-YR i = 3 98 INCHES/HOUR ,O MINUTE25 ESMOUP 2 YR PEAK FLOW 050 x398x„9 2370CFS 245 FS F OW 050 x 5.89x,,.9 35. CFS 3 CFS US NG PLATE 3.1 Ta OF THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK, RSEREDRMETER 36NCES USING TABLE S14-B OF THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK, F BARREL H_FRULEADAr�nH) 11. Ro'USING APPENDIX 3.14-a OFT EVTRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK, R NG ORFCE FLOW 79]3CV/21 SGG SECONDS 1.0 CFS DEWATER NG DR F OFARFA Q/[[(6a 32x HYDRAULOHEAD)^RRsx 0.6} 1.0/z[6432 x2Fn-(lmlxo j o1 SF DEWATERNG ORIFICE DIAMETER xT(A/314)^R2)] 2x[(0.15/314)^(12➢ 044FT-6INCES DIMENSIONS'. NORMALPOOL SURFACEAREA ,0764EF MINIMUM FLOW PATH LENGTH = 140 FT OUTLETRISERILEIG T O.1, ELEVATIONT-342EFEVATION=336 FT OUTLET RISER DIAMETER -361No ES OUTLET BARREL ADIAMETER IN BRING ORIFICE DIAMETER6INCHES, ELEVATION - 34D EMBANKMENT HEIGHT FT ELEVATION 344 NMUM EMBANKMENT TO 6FT MINIM M EX VA SIDE SLOPE - 21 MINIMUM EMBANKMENT SIDE MBANKM NTSDE SLOPE 25.1 LEGEND PROPOSED ANCE OF DISTURBANCE OSITE BENCHMARK (PER ROUDABUSH, GALE AND ASSOC. SURVEY) OWETLANDS (PER KIRK (PER HIRK HUGHES & ASSOC. SURVEY) EXISTING ® IT. STREAM CHANNEL LIMITS (PER KIRK HUGHES & ASSOC. SURVEY) © EPON (PERER KIRK D K HUGHES & ASSOC. SURVEY) PROPOSED DIVERSION DIKE DV PROPOSED CLEAR WATER O DIVERSION OPROPOSED SUPER SILT FENCE SSF PROPOSED STOCHI'II.E WITH PERIMETER CONTROLS (SILT SP FENCE) OPROPOSED CONSTRUCTION ENTRANCE CE OPROPOSED 1 TEMPORARY TSC STREAM CROSSING PROPOSED SEDIMENT TRAP $T lsp//y PROPOSED SEDIMENT BASIN SB PROPOSED CONSTRUCTION CRS ROAD STABILIZATION OPROPOSED CONSTRUCTION ACCESS ROUTE (USE DUST CONTROL PER VESCH 339) NOTE: ALL PERIMETER SILT FENCE ADJACENT TO PRESERVED STREAM CHANNELS SHALL BE SUPER SILT FENCE AS SHOWN ON DETAIL 4, SHEET 18. N SCALE: I INCH = 8o FEET o' 80, 16o' 320' CONTOUR INTERVAL = 2 FT SEDIMENT BASIN 12 CALCULATIONS'. DA - 6.0 ACRES REQUIRED STORAGE = 134 CV PER ACRE = 804 CY SURFACE A"A"' THEO Co. HED NORMAL POOL S�RFACE AREA .2CV/04x4 84 SF SURFACE e T EREQUI2 NEST AL SUR AG ARESURFACEAREA+CREST6784S 4 xDRV DEPTH REQUIRED SURFACE AREA [2x(402 CV /2 F'I)] 6784 SF 4005E " LENGTH MNIMUM W DTHA NORMAL POOL SURFACE AREA /LENGTH e 78a 0 = 83 FT MINIMUM LENGTH TO WIDTH RATIO -LENGTH/ EFFECTIVE WIDTH = 100 / 68 = 1.5'.1 RATIO 0 L METHOD, p = CIA FROM DIVERSION CHANNEEIL)12b CALCULATIONS, TP - 1.17 MINUTES USING NOAA'S PRECIPITATION FREQUENCY DATA SERVERmnP:/td..nvrs.noaa.povmtlac/pitls/I, 10 MINUTE 2-VR i = 3.981NCHESMOUR 1CMINUTE 28 ESMOUR - FLOW =050 x3.98x8.0=11.9 CFS-12 CFS 25YR PEAK FLOW 050 x 5.89xfi0 177CFS 18 CF5 USING PLATE 3.14-8 OF THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK, FRSER HEAD 1) 1 Fr USING TABLE 3.14-6 of THEVIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK, 1 I BARREL EADMIFEL , HCP BARRL DAMETOF -1 a INCHES APPENDIX 3.19-a OF THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK, DOWATERING ORIFICE FLOW - K1-121,.0 SECONDS - 0.50 CFS DEWATERING ORIFICE AREA Q/0{[(6432xHYDRAULCHEAD)^1,2)ax0.e} 5 IEF6 32 x2 FD"(12)]x 0 e) 0 SIT DEWATERING ORIFICE DIAMETER 2x [A/314 11 E2x [007/3.19I^12 -01 FT-4INCHES DIMENSIONS' NORMAL POOL SURFACE AREA - 6 784 SF NIMUM FLOW PATH LENGTH = 100 FT OIUTLETRISERAEIGHT oe.3FT ELEVATION-.29 A ON=346.5 OUTLET RISER DIAMETER - 35 INCHES OUTLET BARREL LENGTH = 100 FT OUTLET BARREL R NG OF FFIICE CIAMETER M111 11 INCHES 4N.H. ELEVA'ON� 3051NV. = 347.5 I COWATEEMBANK MENT HEIGHT 22 FT ELEVATION -354 N MUM EMBANKMENT TOP W DTH 6 FT AVA MINIMUM EMBANKMENT SIDE SLOPE 225, SEDIMENT TRAP IS1 DIMENSIONS. ALCULATIONS. NORMAL POOL SURFACE AREA 120E SF LEVALON 354 INCLUDING 1S1b AND 1SIB) M M�N'M77 UM EXCAVAT ON DEPTH 6FfB TON 380 2 Eo sio n K E T a Fr w R E EvnnON 350 Q R GE CYPFRACRE 30B9cY e2es2cP BERM FIGHT �H Ea FT O UME1 085x NORMAL POOL SURFACE AREAx WET DEPTH HEGHT ATON 358 THE REQUIRED NORMAL POOL SURFACE AREA 4142.6 CF/(0BE x 4 En 121848E BxDA a 136FT o UME2 [NORMAL POOL SURFACE AREA CREST SURFACEAREA))/2]x DRV DEPTH DESLOPE THE REQUIRED CREST SURFAGEAREA [2x(41426 CF/2 FH] 121e4 F 29243E MNMUM EMBANKMENT SIDE SLOPE 23.1 MIN M LENGTH FT FFECTIVE WIDTH/-TNORMAL POOL SURFACE AREA/ LENGTH - 1,218.4 / 70 - 17.4 FT MINIMUM LENGhI TO WIDTH RATIO = LENGTH / EFFECTME WIDTH = 70 / 17 4 = 41 RIVANNA VILLAGE: EROSION AND SEDIMENT CONTROL PLAN AMENDMENT 1 AND PHASE II ALBEMARLE COUNTY. VIRGINIA SCE Blossom Consulting and Engineering Inc. 1101 Professional Drive, Suite G Williamsburg VA 23185 P: 757-870-4825 I\ KEY PLAN ISSUE REV # I DATE I DESCRIPTION Date: 12.04.2017 I Checked By: scon c. Blossom, P.E. E & S STAGE 1: BLOCK I & BLOCK J ES-8 PHASE 2: STAGE 2, BLOCK I AND J (FAST) SUMMARY — — / / T,NOTES AND CONSTRUCTION SEQUENCE LEGEND FINAL LOCATION OF ALL CONSTRUCTION ACCESS & PROPOSED STAGING & RIVANNA VILLAGE: THIS PHASE z STAGE z EROSION AND SEDIMENT CONTROL PLAN FOR RIVANNA VILLAGE BLOCK I AND J INCLUDES STABILIZATION _ - \ / �� / / STOCKPILE LOCATIONS TO BE APPROVED AND CONFIRMED WITH \ ALBEMARLE COUNTY AND PROPERTY OWNER PRIOR TO CONSTRUCTION _ PROPOSED LIMITS OF DISTURBANCE LOD STORMWATER OF UPLAND GRADED AREAS UPON REACHING SITE GRADES. STAGE z PRACTICES SHALL BE IN PLACE UPON COMPLETION OF ROAD \ / _ _ \ J _ _ AND IS THE RESPONSIBILITY OF THE CONTRACTOR TO COORDINATE. MASTERPLAN CONSTRUCTION AND INSTALLATION OF STORM DRAINAGE INFRASTRUCTURE. THE STAGE 2 EROSION AND SEDIMENT CONTROL PLAN FOR BLOCK I AND J INCLUDES THE FOLLOWING \ / ,— / \ / � 1. CONTRACTOR TO PERFORM ROUGH GRADING WHERE SHOWN ON THIS SHEET. O SITE BENCHMARK ASSOC. URVEY)x,cALEAND ASSOC. SURVEY) AMENDMENT 1 AND PHASE II MEASURES: � / 2. ALL DENUDED OR DISTURBED AREAS TO BE PERMANENTLY STABILIZED ALBEMARLE COUNTY, VIRGINIA �� IMMEDIATELY AFTER FINAL GRADE. EXISTING WETLANDS tJ INSTALLATION OF INLET PROTECTION AT ALL INSTALLED STORM DRAIN INLETS O (PER KIRK HUGHES & ASSOC. SURVEY) z.) INSTALLATION OF OUTFALL PROTECTION AT ALL STORM �� \ NOTE. ALL PERIMETERSILT FENCE ADJAENT TO\ \ P SERVED STREAM CHANNELS SHALL B SUPER EXISTING DRAINAGE OUTFALIS. - , S T FENCE AS SHOWN ON DETAIL 4, SHEEt 18. \ STREAM CHANNEL LIMITS -. SEE STORMWATER MANAGEMENT PLANADDITIONAL S FOR BMP 11, 12 -� ` O (PER KIRK HUGHES &ASSOC. 3.) ROUGH GRADING OF PROPOSED PERMANENT BMPS TO AND 13 DESIGN AND SPECIFICATIONS. STAGE 2INCLUDES ONLY ROUGH / ^ \ / SURVEY) APPROXIMATE DESIGN ELEVATIONS, AND PERMANENT STABILIZATION OF PERIMETER GRADES. GRADING TO APPROXIMATE FINISHED BMP DESIGN ELEVATIONS TO FACILITATE OUTFALL FROM STORM DRAINAGE INFRASTRUCTURE AND // / /J l EXISTING POND INSTALLATION OF RETAINING WALLS, BMP RISER STRUCTURES PLACEMENT OF STABILIZED OUTFALL. RISERS SHALL BE INSTALLED AS l A COMPONENT OF STAGE 2. DO NOT INSTALL UNDER DRAINS NOR / / \ \ (PER KIRK HUGHES &ASSOC. SURVEY) 4.) (PRINCIPAL OUTFALIS) AS SPECIFIED ON THE STORMWATER ENGINEERED SOIL MEDIA FOR BMP 12/13 NOR FINAL AQUATIC \� MANAGEMENT PLANS (STAGE 3). DO NOT INSTALL ENGINEERED SOIL MEDIA, UNDER DRAINS, OR FINAL BIORETENTION PLANTING BENCHANEI-AND PLANTINGS IN BMP 11 UNTIL UPLAND CONTRIBUTING DRAINAGE AREA IS COMPLETELY STABILIZED IF, STAGE 3). \... APPROXIMATE EXISTING TREE LINE MATERIALS. / i• .� (PER KIRK HUGHES ffiASSOC. SITE LANDSCAPING OUTSIDE OF PROPOSED PERMANENT BMPS / / SURVEY) SC E 5.) MAY BE INSTALLED PER THE LANDSCAPE PLANS (PROVIDED UNDER SEPARATE COVER) ONLY AS APPROVED BY THE LANDSCAPE ARCHITECT. T, �t\ / J / SEXISTURVEY) ING ROADHUGHES ffiASSOC. Blossom Consulting and Engineering Inc. 1101 Professional Drive, Suite G Williamsburg 23185 L 6.) CONSTRUCTION OF THE OUTFALL PROTECTION FOREBAYS • OP \ _ / TS ',� / EXISTING FENCE KIRK HUGHES & ASSOC. ASSOCIATED WITH BMP It. NOTE THAT THE TEMPORARY SEDIMENT I IF ,,\ / \ (PER P: 7i 7-87 25 P: 757-870-4825 BASIN (SBD), WILL BE INCREMENTALLY REDUCED IN SIZE AND ( / SURVEY) / r� \ REPLACED WITH THE MAIN SEDIMENT FOREBAY FOR It AS THE SITE REACHES FINISHED GRADE ELEVATIONS. \ ' 7.) TEMPORARY PUMP AROUND AND/OR DIVERSION DURING �`\ 9/C ,,\ DEMOLITION OF THE EXISTING EMBANKMENT AND I EXISTING BUILDING (PERKIRKHUGHES &ABBOT. CONSTRUCTION OF THE PROPOSED EMBANKMENT AND CLAY CORE. WITH FINE STAGE 2INCLUDES OF INSTALLATION OF CLAY WITH EXCEPTION OF INSTALLATION OF THE CLAY LINER FINE GRADINGIt SHALL PLANTING AND COMPLETION OF BMP SHALL NOT COMMENCE UNTIL STAGE 3 AS SHOWN ON THE STORMWATER \ ��\ •�\ _ I % ' (� \ [� -� T�9i9 \IP \/ y� O ,,\ �Q I / 90 O EXISTING POWER POLE (PER KIRK HUGHES &ASSOC. SURVEY) I \. /`•. 1 \• / \ I •.\ \•,\ ' PLANS. O EXISTING SIGN (PER KIRK HUGHES & ASSOC. (, ` `\ 8.) INSTALLATION OF PRINCIPAL AND EMERGENCY SPILLWAYS AT EACH BMP LOCATION H1, I2, AND 13). NOTE FOR It, THE TEMPORARY 1p IP C� ♦ m \� SURVEY) \• / CORRUGATED METAL RISER WILL BE REMOVED AND REPLACED WITH THE PERMANENT CONCRETE OUTFACE STRUCTURE (AS SHOWN ON THE STORMWATER MANAGEMENT PLANS) DURING I IP EXISTING CONTOURS (PER KIRK HUGHES&ASSOC. STAGE 2, AS THE BMP It ROUGH GRADES ARE ESTABLISHED AND THE EMBANKMENT CONSTRUCTED. ,\ �� (;5=1 TS �J IP STAGE 1 TEMPORARY SEDIMENT TRAP REMOVED DURING STAGE 2. \ �`\'\'``��"` a SURVEY) \`\ 9.) PHASE 2 STAGE 2 EROSION AND SEDIMENT CONTROL PLANS Up I 1 .J + EXISTING STREAM BUFFER _ SFTOO BE IS AS PLACEPRIOR TOO CONVERSION PEPPICT ELE ELEMENTSONV RSION TO _ \� M -- BLOCK I IP (PER ALBEMARLE COUNTY) KEY PLAN •/ PLAN.\ ALL EROSION AND SEDIMENT PERIMETER CONTROLS SHALL OP IP BM BMP G3# \ IP ` / / �� O OF (STABILIZED UPON SED COMPLETION UPON COMPLETION OF PHASE z) RE REMAIN IN PLACE THROUGHOUT CONSTRUCTION ACTIVITIES AND REMOVED ONLY WHEN FINAL SITE STABILIZATION IS ACHIEVED.. SSF / IF IP \ NOTE: TO CONSTRUCT EMBANKMENT, DIVERT STREAM CHANNEL (PUMP AROUND AND/OR DIVERSION CHANNEL) AROUND LIMITS ♦ OP O \ ♦ IP IP \ IP TS \ � / /� t i O PROPOSED LANDSCAPE PLANTINGS (SEE LANDSCAPE PLANS) OF DISTURBANCE. DIVERSION CHANNEL SHALL BE LINED WITH EROSION CONTROL MATTING OUT CONSTRUCT' OUTFHALL AND CHECK AT CHANNEL SHALL �_ 1p B' +� IF, IP ♦ 11\e I \ R IF PROPOSED STORM DRAIN (SEE PROTECTION BE DAM BE MINIMUM 5 FT BOTTOM WIDTH, z IT FLOW DEPTH, 3:t SIDE SLOPES FLOW A IP + TS / \ 4 SITE PLANS BYALAN TO CONVEY THE BANKFUI.L EVENT NON-EROSIVELY. LARGER EVENTS SHALL BE ALLOWED TO BYPASS THROUGH PRINCIPAL BMP G1 /+ +- / \\` FRANKLIN P.E.) EMERGENCY SPILLWAY. * OP IP �!L + DIVERSION PROPOSED �GHT OF WAY RWD SSF IP • %• /+ Q�C��O + SSF �+ TS IP �� / IP \\, ` O PROPOSED SUPER SILT FENCE SSF ISSUE REV # DATE DESCRIPTION - 1P TS STAGE 2 INTERMEDIATE Iz AND 13 � _. r `, EMBANKMENTSCOMPACTED AND \ MBANK ENT TO s COMPACT FICATIONS ON STAGE 3 \ O PROPOSED OUTFACE �P O #t 3/z/t8 PER COUNTY COMMENTS #z 4 (i t8 PER COUNTY COMMENTS Ip + 1 RIP RAP (MIN DEPTH AND STABILIZED WITH CLA55 2.2 FEET )TO 10 YEAR WATER PROTECTION \(/ SURFACE ELEVATION (353 FT). ALL DISTURBED \� OP AREAS TO RECEIVE RIP RAP SHALL BE UNDERLAIN PROPOSED INLET P WITH GEOTE-LE FILTER FABRIC PER VEECH ` STANDARDS AND SPECIFICATIONS. +� / IP O PROTECTION \ \ BMP12 / PROPOSED < �\ +/� O GRADING (STAGE 2IE&S) PERMANENT STABILIZATION BMP 13 TH Op � TS TEMPORARY Gl 1L a 1 �\I � \`,,' \ I A � \ ♦ • \mil, , / /+� STABILIZATION V .��VA A • �+ +�� y SCOTT C. BLOSSOM Lac. No. 40287 \\ ��\\ + PROPOSED SEEDING A C B \ BMP 11 \\ \. - BM r , /t ,� �! / O AND EROSION CONTROL MATTING OA. �W IONAL v v \ \� i / T6 W _ • P P CD PROPOSED CHFOK DAM J RR \\�� / r SEE BUFFER MITIGATION PLANS FOR REQUIRED MITIGATION N I \ \ I % �\ \- Q - ♦ //+ w , MEASURES TO BE IMPLEMENTED UPON IMPACTING THE STREAM P r BUFFER FOR EROSION AND SEDIMENT CONTROL, STORMWATER 4 MANAGEMENT AND DE ELOPMENT RELATED ACTIVITIES. PV O O PROPOSED PUMP AROUND AND/OR Job NO: 1005 DfaWfl By: BCE Date. 12.04.2017 Checked By: S-C. Blossom, PE. C ' +/ ///{{{ - --- - DIVERSION CHANNEL E & S STAGE 2: BLOCK I k BM _ /� ` W q , - IF - - �' \� OP CO U \ OPROPOSEDCLASS t RIP RAP \ t / 11 TEMPORARY DIVERSION CHANNEL (AND/OR PUMP AROUND) TO SCALE: 1 INCH -Too FEET CD SF \ F CD P BE INSTALLED DURING CONSTRUCTION OF TS / NOTES THIS SHEET). REMOVE AND STABILIZE BMP J1 s FOREBAY AND EMBANKMENT, PRIOR TO BRINGING EMBANKMENT (SEE UPON COMPLETION OF - POND ON LINE. ---- - x TS \ O PROPOSED BLOCK LIMITS r r------ o' ioo' 200 4Oo ,� ✓ cD T CONTOUR INTERVAL = 2 FT \ J (1 Q � S PHASE 2: STAGE 2 EROSION AND SEDIMENT CONTROL PLAN (BLOCK I AND J) J 9 RIVANNA VILLAGE: 360- ALLDIEEHRBEDARICS 360 SEDIMENT BASIN Ii (STAGE I) EROSION AND SEDIMENT TO RECEIVE 6INCHES SEE STORMWATER PLANS FOR PERMANENT BMP D REINFORCED SEE CIVIL SITE PLANS DIMENSIONS '. 358 TOP SOIL AND CONCRETE PRINCIPAL SPILLWAY STRUCTURE TO BE INSTALLED AS STABILIZATION SEED MIX A COMPONENT OF TRANSITION FROM STAGE z-13. (BY ALAN FRANKLIN P.E.) 358 NORMAL POOL SURFACE AREA = 10.764 SF CONTROL PLAN PRIORTOAPPLICATION PERMANENT CONCRETE RISER SHALL REPLACE TEMPORARY CMP(INSTALLED OF EROSION CONTROL DURING STAGE H WHEN ROUGH GRADING FOR BMP I, IS COMPLETED FOR PROPOSED STORM DRAIN INFRASTRUCTURE DESIGN MINIMUM EXCAVATNOTTO IODEPTH 5FTBMELEVATION-338FT OUTLET RISER HEIGHT 6 FT, ELEVATION FT 356 MATTING AS SPECIFIED (AETERSTABILIZATION OF CONTRIBUTING WATERSHED). 356 - -342 OUTLET RISER CIAMETER = 36 INCHES HEREIN / - ouTIET -El oAMETER50za IINCHES AMENDMENT 1 AND PHASE II PROPOSED COMPACTED STRUCG maI TEMPORARY CORRUGATED METAL (CMP) RISER SEDIMENT BASIN DEWATERING / 354 DEMWBHNTKRIING CRI ICE DIAMETER - 6INCHES, ELEVATION - 340 ALBEMARLE COUNTY, V I RGI N IA 3$4- PROPOSED COMPACTED STRUCTURAL TEMPORARY FILL TO EL.EVATION344 FITO SYSTEM WITH TEMPORARYCURRUGATED METAL CULVERTTHRODGH EXISTING / I KMH NTT PWIDTU ELEVATIONPI--344 EMBANKMENTPILL(SEESTORMWATER ATTAINSEDIMENTBABINDESIGNVOLUME EMBAx�ENT EXCAVATIONACESLOPE 2.1 / PLANS FOR DETAILED SPECIFICATION FO FILL RISERDIAMETER= 361NCHES MINIMUM EMBANKMENT SIDE SLOPE - 2.51 35 MATERIAL, CLAY CORE AND KEYTRENCH. EXISTING STREAM CHANNEL TO ACT OUTEAL.LBARRELDIAMETER=z41NCHER ADDITIONALGEOTECHNICALREPORTTOBE OUTFALL BARREL LENGTH FEET ISM. FT, OS INV. FT) 352 NOTE: SEE STORMWATER PLANS FCR ADDITIONAL DESIGN DIMENSIONS AND ELEVATIONS ASERTASBDURINGSTAGEI,AND =50 (US =338 =3375 PROVIDEDUNDERSEPARATECOVER SHALL BE DIVERTED(AND/OR ORIFICE SIZE=6INCHES FOR STAGE 2 INTERMEDIATE ROUGH GRADING OF BMP II 350 PUMPEDAROUND DURING GRDTCE ELEVATION = M. FT 350 CONSTRUCTION OF EMBANKMENT (SEEDETAILSHEET,8) DURING STAGE, AND STAGE 3 / APPLY6INTOPSOILANDSTA -- 348 EMBANI0r1EN'IWITH STAGE, BMP I, ROUGH / 348 (INTERMEDIATIO- STABILIZATION SEED MIX SEESTORMWATERPLAN GRADING( ONLY) SEE STORMWATER PLANS AND EC-3 MATTING FORPRINCIPAL OUTFALL FOR FINAL DESIGN ELEVATIONS TO BE / \ 346- STRUCTURE DESIGN CONSTRUCPEDINSTAGRAFTERUPS'TREAM \ 346 WATERSHED IS COMPLETELY STABILIZED. 344 — — / ______. 3 44 ll� — II=1 GIII I I II I I I I I I I L GIII —I 342 342 — 340 T� — �• / s------- ---� 34o ITT=111� I� , — III —III tlInc. Blossom Consulting an Engineering 1101 Professional Drive, Suite PROPOSED GRADE Williamsburg VA 23185 —III=Td — — — — L—III—I 338 757-870-4825 33� =11I =III —III= LJ p: III�IGI11— III�III�,,,`•x i 336- y, i EXISTING POND EREMOTIONSARE APPROXIMATE BABED 336 A, i DEMOLISH EXISTING EMBANKMENT I VA FIELD SURVEY.SEDIMENTAND DEBRIS ACCUMULeITfoxvARTES IN SELECT LOCATIONS OF EXISTING POND. CONTRACTOR SHALL AND REMOVEUNSUITABLE MATERIALS PROPOSEDSTAGEISEDIMENT A �, TAGEISEDIMENT BASIN REVIEWGEOTECHNICAL RECOMMENDATIONS AND BE RESPONSIBLE 334 TO PREAPPROVEDOFFSITEIOCATION BASIN [, GRADING. MAX z:, SIDE A------------------------ ---------------- ISB I') il FOR DEWATERING EXISTING FACILITYT FACILITATE ROUGH GRADING 334 ORON-SITE DEWATERING AND SLOPES TO REACH DESIGN TO DESIGN ELEVATIONS FOR STAGE, BEDIMENT BASINAND STAGE s INTERbIEDIATE BMP H GRADING STAGINGAREA ELEVATIONS 332 332 0+00 0+10 0+20 0+130 0+40 o+5o o+6o 0+70 0+80 0+90 1+00 1+10 1+20 1+30 1+140 i+15o i+6o 1+70 1+180 1+I90 2+00 2+10 z+I20 z+130 z+40 z+50 2+60 z+70 2+80 z+90 3+100 3+110 3+z0 3+30 3+40 3+50 CROSS SECTION C-C' (SBI1/BMP I1) VERTICAL SCALE: 1"=4' HORIZONTAL SCALE 1"=20 362 362 PROPOSEDGRADE TAGS 3: LEVEL 2 360 BIORETENTION SPILLWAY PROPOSED REGAINING WAL 360 (SEE STORMWATER PLANS (SEE SM—WATER PLANS) FOR DESIGN DETAILS) 358 STAGE 3: LEVEL2 358 BIORETENTION SPILLWAY (SEESTORMWATERPLANS EXISTING FOR DESIGN DETAILS) 356 - 356 GRwnE KEY PLAN PROPOSED 354 � sTAeD.IunoN 354 SEEDING 35z 352 1 T 1 1 AGE 3: LEVEL2 ; I 350 BLORETENTION L3 350 s s s s I I 1 (SEE STORMWATER PLANS) ; O 1 1 I ; I 348 I 348 ----I- IL DIVERSION SWALES IS1a-IS1g 346 346 STAGE,. INTERMEnIATE BIORETENITONGRADE TAGS 3: LEVEL 2 344 BIORGUENTION 344 344 ROUGH GRADE PROPORT DIMENSIONS ISSUE RMWAI, H8 WFALL� CULVERT (,8INCH RCP) (SEE BTORMWATER PLANS) TOP WIDTH - 12.0 FT. US INV. = FT, MAX. DEPTH - 2.0 FT. REV# DATE DESCRIPTION DS INV.=346.348.3 5 FT PROPOSEDSTRUCTURAL 343 FILL SEE NOTESSHEETS 342 12. ESI N 342 STAGE,: SEE STORMWATER PLANS SEDIMENT BASIN FOR DETAIL #T 3W18 PER COUNTY COMMENTS 340 340 342 f #z q 16 18 PER COUNTY COMMENTS 0+00 0+10 0+20 0+30 0+40 0+50 0+60 0+70 0+80 0+90 1+00 1+10 1+20 1+30 1+40 1+50 T+6o 1+70 1+80 1+90 2+00 2+10 2+20 3a1 CROSS SECTION D-D' (SB2/BMP I2/I3) CI iAPN VERTICAL SCALE: 1"=4' HORIZONTAL SCALE 1"=20 + 40' c P a 3400 5 10 15 20 DISTANCE (FF.) 364 364 DIVERSION SWALE CROSS-SECTION VERTICAL SCALE: 1" = 2' HORIZONTAL SCALE: 1" = 5' 362 PROPOSED EC-z MATTIN 362 (SEE DETAILS,-3. SHEET 14) 360 ` ENFE 360 GRADE ,Tµ STAGE PyTH Op Gt _ _ ,CISTING ILLWAY'(SEE DETAIL 6, SHEETI8) 4• 11 358 358 'z _ - _ SCOTT C. BLOSSOM 0 y Lic. No. 40287 356 A, 356 oA �SSIONAI, ' � 354 354 35- 352 PROPOBED COMPACTED STAGE 1: SEDIMENT TRAP-J STRUCTURAL PILL SEE 350 NOTES SHEEI'ES-4 APPROXIMAT 350 JobNo 1005 DfaWG By: BCE ( SEE DESIGNANDSIZING SDMIGNANESHEET AND SWM PLANS STREAM CHANNEL LOCATION Checked By: Sc C. Blossom, P.E. Dafe: 12.04.2017 ES-e) BLOCK I: CROSS SECTIONS (1) 348 348 0+00 0+10 0+20 0+30 0+40 0+50 o+6o 0+70 0+80 0+90 1+00 1+10 1+20 1+30 1+40 CROSS SECTION E-E' (SEDIMENT TRAP) VERTICAL SCALE: L"=4' HORIZONTAL SCALE 1"=20 ES - 10 m � .1Fropculoos arvsnnanEVAx.gnana Anayelav_armas arvsnnaa"z esc aevx.m.al"IIIIMr,x. xs,es�,,:ssllsw�i,selk 1, rys, DIVERSION CHANNEL JS1 CALCULATIONS RATIONAL METHOD D GA - p\ / 5 + V � + i / / + DA IS2b k / "J+ O LEGEND / 5 ss AG ♦ 6 NG PLATE6 6 USINGPT°owH;ANo�°LOFTME RGNAHRDBGNAND6EDMENTGDNTROL�NDBDDK. n BHALLDwwN„LEN�T�QF33°°F A osso°Eo°a°o' oo°.1H ..B TIGHAN LENGTH AND SLOPE DE9925 50,9HOURS Nc ANN Houas NGTH OF PROPOSED LIMITS RIVANNA VILLAGE: EROSION AND SEDIMENT 366 us NG No-HO'F C PTAT DusNev DATA AFBYER (,HRhDd�.nws no>3• eovmasorowv), OMNU�2 R 3.96 NCHEsmouR '/ -\ / IS / - I\ - OF DISTURBANCE CONTROL PLAN 10 MINUTE IO VR 525 INCHESIHOUR 51 /+ ~\ % , ACRES 2 VR osox 3.ee xz Ul SCEs YRPEAKFLow c5ox525x2.5, 7 C'S(PER \ + / / ' / O ROUDABN BENCHMARK ALE D AMENDMENT 1 AND PHASE II SLOPEOFPROPOSED CHANNEL RSE/RUN BFT/340 FT 0.024 S /RUN- /34 USING PLATE 5 2 OF THE V RG N A EROSION AND SEDIMENT CONFROL HANDBOOK, V = 2.51 °// T/zz z.BSOFT \ / / .. �(' / +� .� / / ASSOC.SURVEY)H�G ALBEMARLE COUNTY, VRGINIA oss= oEPTH (di zFwr) BorrOMFORE ro) aFr /+ `..� / O••`. OD •� / OV IN GVENtl1SDE Szo-se zFrxa zFrxz 4Fr pV B2 / •� / O (PER KIRK HUGHESD&ASSOC. TRAPEZO DAL CHANNEL CROSS SECTIONAL ARE4W roxtl)+[Zx(tl SURVEY) ' \ (OFF x 2 FTI + [2.((2 1E0� 2)7 16 SOFT TRAPEzo DAL CHANNEL roaw DNH d+2xaxz) a +2xz Frxz) TRAPEzo UAL CHrwNEL HYDRAULIC RADIUS (R) {@xy+Izxld^2)]}/{d+{(2 xd x[(lz"27+,)^(,2)]4} / / "," '"; • / ♦ �.� , i �� EXISTING STREAM CHANNEL LIMITS {R x 2) + [2 x (2^2u' / {4 + {(2 x 2 x E(2 ^2) + 1) ^ Fk)]}4 I / SEE STORMWATER PLANS (STAGE 3) FOR PRINCIPAL -� ® KIRK HUGHES &ASSOC. _ 1 z3 FT CHANNEL LINING PERM SS DUEVELOCm OF 004aFT/S ITING,\ / '. BEDESIGN SPECIFICATIONS, ELEVATIONS AND DIMENSIONS. PERMANENT RCP SHALL BE • (PER SURVEY) (/DOT APPROVED MATERIALS, AUGUST 2014 BECTON 57) HHFJ v.Vrle'neapt.oD us nesshesou�ceyMeRies/App-d Lsts.PdO USING TABLE5 COEFFC I \- ' ` S.G. f INSTALLED WITH DURING STAGE 1 ACTIVITIES AND . MODIFIED PER STANDARDS DEPICTED ON SHEET I] •`. AND IS. PERMANENT RISER TO TO FINALIZED ` ' EXISTING POND (PER KIRK HUGHES & ASSOC. USING PLAT 290E THE VESCH ROUGHNESS ENAT (n)N 0046 MAX CAPACITY FLOW F.-/n)x[R^2/SU.S^(1MI.A (149/0.04IIr.R 23^2/91.N 02-F,I)x 16 ES VELD 9 2CFS Mwc cAPAO TY c Rae/n)x[R^I2/a)]x[-FR)I (1ae /c 9s67x[1 z3^(zr377x[a aza^(12)I CI / 7 , •�. �/ ' DURING STAGE 2 AS SPECIFIED ON SHEET I2. • • SURVEY) APPROXIMATE DIMENSIONS 5.8 FTr5 MNMUM eoTroM wDTH aFr M N MUM DEPTH 2 Fr MINIMUM SDE SLOPE 21 AVERAGED-NNELELDPE B02a \ DA ISI S, ^ ► 0.71 AC , / RWD -- • U� li Q /' 38^,. EXISTING TREE LINE (PER KIRK HUGHES&ASSOC. SURVEY) EXISTING ROAD $CE IF NG �G ANEDWBHEQ2MA NG \ • � (PER HIRK HUGHES &ASSOC. DIVERSION CHANNEL JS2b OALCULATIONS METHOD, ❑ CIA + / / I I , I'. CRS ) O I �(� SURVEY) Blossom Consulting n d En Inc. g an Engineering 1101 Professional Drive, Su to G c To.se (Roue aARCECIL) USINCIP TESP-1 ANO 5-2 OF THE MFQNIA EROSION AND SEDIMENT CONTROL HANDBOOK, \ \ `� , / / -- \'� I /./ / I \ w O EXISTING FENCE (PER KIRK HUGHES &ASSGC. Williamsburg VA 23185 p; 757-870-4825 T[ OVERLAND WITH LENGTH OF 100 FT AND SLOPE OF 0.12 0.009 HOURS c ALLow W TH LENGTH LENGTH G' 214 ouas TE-0.036 HOURS -2.18 MINUTEs�DA OPEERVER sz ooaos Rouas a USING NOAAS PRECIPITATION FREQUENCYA s ARA, SERVER nwenoes. m Gp,asA. 0 (5,ro m H ` \ . 2.51 AC O - • SURVEY) EXISTING BUILDING e w s ,o MINUTERUTH 1.vRR a21NCHEsmouR INCH U e6 AC SB1 \` / ,\ pV /x ® (PER KIRK HUGHES &ASSOC. SURVEY) VR PEA OW 050 3.98 B65 5]CF5�+••' SLOPE OF o vR PEAK .Low osox / RUNES 10 FT/ 247 FT 0.079 USING PLATE eP�oF� HE vN G EROSION AND SEDIMENT coNraoL HANDBOOK, v - 4s Frre M N MUM FLOWAREAA) Q/ 5/4.6 1.6SQFT ` - \ \ ) '" / / '• `• EXISTING CONITOURS (PER KIRK HUGHES & ASSOC. L.\ DEBGN DEPTH�dw 2 DESIGN PEN z:ai SDE SLOP e@)2 FT c 2FTx2 4FT z 4 2" 2. / % , ` / / / / SURVEY) `v (/ \ eEzo oHANN TRAP DAL ILIFo72IEGTQNALAR FAW roxd)+axld^2)1 1. (4FTx2 FTl+[2LLOPWI2)] -P1(2 ,z Fr TRAPEzo DAL CHANNE-CR d+2xa-R 4)L[-xz Fr11l - -.._: �• EXISTINGSTREAM BUFFER (PERALBEMARLE COUNTY) '\ \�/ ULI TRAPEzo DAL CHANNEL HvORAULC RADIUS(RI {@xd7+Izxld^2)]}/{b+{I2xdx [(R^z)+,)^(,2)➢1 '(4x,+[2x12^2)]k/{a+{2xzx[(2'�+,)"(,rz77k3 CHANNEL LINING = VEGETATED WITH EC-3 MATING. PERMB6e EPODR QEa9 ]9�5 ( DONAPPRD'VEDMATERALB ANGUST2o,4 aED DN5 11nro:/hw.w.v rodeapl pr9/pps ne�hesources•M.!1oII/Apprwed_LIs1s.Pop USING TABLE513 OF THE VESCH RETARDANCE CLASBFCAION C / /+ ' SSF x... + // ♦ / PROPOSED DIVERSION DIKE O \ I%/,_/• \, UBNGPLATESz90FTHEVESCH, R°UGHNESSC°EFFCENT() 0.036 / MAX CAPACITY ELow 13.7GFx [R^(zG)Ixts-(,rzt]xA (4-1 .z3^2/.i)I x[9.9T9^Pm]x16 z,3 7 1y+ {'I - - --- - PROPOSED CLEAR WATER \ 491 MAX GAPAC TY VELOCT' 1149/n)xIR^12/3)7 x[6^(1/nl(1.9/0-036)x[123^(2/3)lx[0-079^(1/PI -4- � �\ / DIVERSION KEY PLAN DIMENSIONS MI NI MUM M N MUM DEPTH BOTFOM WIDTH 41 MNMUM SDE SLOPE 2-1 AVERAGE LSLOP o.079 CHANNEL + OP \ , K _. I" INSTALL TEMPORARY SEDIMENT TRAPS IN \ / PROPOSED SUPER SILT FENCE SSF -VI LNNG VCHANN ED LINING WITH EC 3MATT NG + a x - TJS1 LOCATION OF FUTURE J1 AND J2 EMIRS PER DESIGN SPECIFICATIONS AND DIMENSIONS DEPICTED x CLEAR WATER DIVERSION JS2a CALCULATIONS RATIONAL METH + / I , // / HEREIN. INSTALL OUTFALL PROTECTION AT - DIVERSION OUTFALLS AND AT OUTFALL OF PROPOSED SEDIMENT TRAP PER DETAILS ON SHEET / - -- PROPOSED STOCKPILE WITH PERIMETER CONTROLS SILT ( SP O n"' 5LA°NDus°A 0 o20 (M q / 17 AND 18. FENCE ) SN U c LAN 1ANDGTH OF1EVIRGNA LOSO FANUSEDMENT CONTROL HANDBOOK Tf 0.08 0193 HOURS WITHLENGTHOF 50 80 IF AND SLOPE T[ SHALLOW WITH LENGTH OF 5742 FT AND SLOPE OF 002 00024 OURS SHAOMELLOW F T CHANNEL256 OUR LENGTH MI UTES FT AND SLOPE OFoo2s o.oza Houas HOUR US nNOAAS 53]MNures USING NOAAS PRECIPITATION FREQUENCY DATA SERVER (M1tm://ndsc.nws npsa , I , ---...__ / O PROP OSEDCONSTRUCTION ENTRANCE CE govmdscmfds/), 10 MINUM2YR' 3.981NCHESMOUR ,OM NUT- R 525 NCHES/HOUR O P ` .' + \ / I ' • / A sz6ACRow o2ox398x526 4s CFS 10-VR PEAK FLOW = 0.20 z 525 x 526= 55 CFS S� Z+ U , I , \ %- \ F / L O PROPOSED TEMPORARY TSC SLOPEOFPROPOSEDCHANNEL=RISE/RUN=36FT/8085FT=0045 ANE62OFTHEVRDNAERo3oNAND3EDMENTCONTROLHANDBOOK,V-3.4FT,6 MNMUM FLOW ARI DIV 5.5/3.4 1.6SOFT SF ' t STREAMCROSSING=UG ISSUE DES GN DEPTH (I 2 FT OFS GN BOTTOM wDFH(u 4FT GVEN 2.15 ESLEe 2ENzd 2ENx2 4ET z e/d 2 ... -'" + pV ( / _, • - CONTRACTOR TO INSTALL TEMPORARY CLEAR ` WATER DIVERSIONS UP SLOPE OF PROPOSED LOT - - ` GRADING TO DIVERT RUNOFF FROM OFF SITE - PROPOSED SEDIMENT TRAP ST REV # DATE DESCRIPTION J __ _ CONTRIBUTING DRAINAGE AREAS AROUND THE TRAPEZO DAL CHANNEL CROSS SECTIONAL AREA xtl + V. tl^ • - (4FTx2 FTI+[2x((2 FT7^2j] ,6SQFT _ x `� ro ) [2 ( �) DISTURBED AREAS STRING REMAIN PLACE U CLEAR ` WATER DIVERSIONS TOREMAIN INDSTOR UNTIL TRAPEzo DAL CHANNELT DP ULII b+(8(R) z( 4 +[Z.(d ENx2) 12 ET----------_ NRAPEZODAL CHANNELHYDRANLCRADUS (R) {@xa)+[zx(d^2)]}/{b+{I2 xe x[((z^2)+,)^(,2)])} '(4x�+[zxlz^z)74/{a+{2xzx[(2^2)+1)^(1!2)➢] ,4 / / I REED DISTURBED AREA IS STABILIZED AND STORMWATER ` INFRASTRUCTURE IS INSTALLED. O PROPOSED SEDIMENT BASIN SB O #1 3/2/18 PER COUNTY COMMENTS #2 41618 PER COUNTY COMMENTS MATING CHANNEL LINING VEGETATED WITHVELOCITY VEL PERMISSIBLE VELOCflY OF040 FTIS ry x I • ` (VOOT APPROVED MATER ALS AUGUST 2014 SECT ON 57) - a vApprrnrea L cs PdO ornHP:/,wwN.vrH n ET oANC nessneE F CATION USING PLATE s z9 OF THETHE VEscH ROUGHNESS coEFF c ENA (n)N a a4, _ / I ((! I , ` �. O PROPOSED CONSTRUCPION ROAD STABILIZATION CRS MAX CAPAC TY FLOW L49/nFx[R^(2,Gf LS^(,/2)]xA (149/0.04,)xL 23^(2)Ix[0.045^IT MI 16 /+ O P F / ' • ` MAXCAPACTVVELOCTYa n4a/n)xIR^f2I3)]x[e^(t2)1 (tae /a OanxH 2a^(2l3)]x[O Oas^(t2)1 DIMENSIONS M WIDTH a ,\I I , PROPOSED CONSTRUCTION ACCESS ROUTE (USE DUST CONTROL MIN:- DEPTH N MUM II DE SLOPE AVERA NEL SLo PER VESCH 3 39) L NED 'VEGETATED wTHEG2 MATTING '\ DA JS2a DA JS2b 5.26 AC , O ' 2.86 AC PROPOSED OUTFACE : ' PROTECTION OP SEDIMENT TRAP JSI GI `"\' � ' DA-251A ACRES REQU RED sro AGE / y \\� OP TJS2 LTH 0F, 134 CY PER ACRE 3353E FV EREou IREo I ORrsnLPoo� sEHFncE naEn -1 a cv / (0 ee. z Fn z 67, sF \ + -\ •. - - - NOTE: ALL PERIMETER SILT FENCE ADJACENT PRESERVED STREAM CHANNELS SHAD TO BE SUPER vOLUMEz [(NORMAL POOL suRFACEAREA+CRESTSURFAGEAREA)/21 IFYDEPTH 7 ` BLOCK (EAST) ,V+ SILT FENCE AS SHOWN ON DETAIL SHEET o THE REQUIRED CREST SUREACE AREA [2x(16B CY/z FT)] 2611 BE 1S]o BE MINIMUM FLOWHPATN LENGTH EFFECT ORMALPOOLSURFA°EAREA/LENGTH 2 71/80 680/3S4- T \T T SF ' �1. \ .I I: I(� \ '1^" , 4r I8. o SCOTT C. BLOSSOM y lie. No. 40287 MUM LENGTH TO WIDTH RATIO LENGTH/ EFFECTNEWDTH 24' \ \+` / A �0 DIMENSIONS- MIINIMUMPf Low PATH LENGTH - SG FT' sF, ELEvnnoN - 336 pV \ -\ / ti+ tONAL �Gl{ MINIMUM EXCAVATION DEPTH 4 FT, BOTTOM ELEVATION 332 BANK HEGHr 6ET ELEVAT ON 3?e M BERM TOP WIDTH OUTLET HEIGHT 2FT ELEVATION 336 N M MUM WE R LENGTH 6 x 6 x DA 2s, 15., Fr ` \ , P . NOTE: ALL CLEARWATER DIVERSIONS SHALL MNI"A/ATDNSDPSLGPE 21 MNMUME.aANw,nENNSDESLaPE a:, %� _ - - - - - - - - � 'I'FRMINATE INTO OUTFALL PROTECTION (CL 1 RIP I�jj s y\ .� RAP MIN LENGTH 2O Job No: 1005 DrI By: BCE SEDIMENT TRAP JS2 - r Date: 12.04.2017 CALCULATTIIOES : \ NOTE: ALL SILT FENCE AND SUPER SILT FENCE Checked By: soon C. BIK-, P.F. REQUIRED srORAGE -134 cY PER ACRE - 383.2 cY I=0 xNORMALPOOLSUREACEAREAxWETDEPTH. F'VOLUME, _ \ SHALL BE A MINIMUM OF 5 FT FROM STREAM BANKS. SCALE: 1INCH=5oFEET E & S STAGE 1: BLOCK J (EAST) THEREQUIRED NORMAL POOL SURFACE AREA =,9,.6av/(o.B6x4FT) =1,521.7BE TF VOLUME 2=[NORMAL POOL SURFACE AREA CREST61JRFACEAREA)/27x DRY DEPTH �, •/• HE REQUIRED CREST SURFACE AREA - [2 x (191.6 CY/ 2 ED]-1521.7 BE - 3,651 .5 SF • • \ \ NOTE: SILT FENCE SHALL NOT BE ' NIMUM FLOW PATH LENGTH = 6c FT EEEEcrME IRIS = REA/LENCTH=1621.T/6c=2-FT � \ ',.` `... INSTALLED ACROSS SPILLWAYS. O' 50T 100' 150' MINIMUM LENGTH TQWIDTHRATIO- LE=iEFFECTME wlOTN-60/254-2.a:1 DIMENsIo°os SNRFACE AREA =1522 SE E-ION = 3S2 - - - - 4 \ O U L L S\ CONTOUR INTERVAL = 2 FT =AAM M EZCAVATIO DEPTH -a Fr SCILOM ELEVATION - 328 NK HEIGHT-2 FT, ELEVATION-334 \ \ $ \ \ \ OUTLErMHEIGHTL eG H'FLEVAT NGoAPE gx3 g6- 72Fr NOTE: ALL CLEAR WATER DIVERSIONS SHALL MINIMUM EMBANK'°NTIDEESLOPE-:' PHASE 2: STAGE 1 EROSION AND SEDIMENT CONTROL PLAN (BLOCKJ (EAST)) OUTFALL E S - 11 MINIMUM EMBANKMENT SIDE SLOPE = 3'., RAPMIN LENGTH RAP MIN LENGTH 20 FT). TS X PHASE 2: STAGE 2, BLOCK I AND J EAST SUMMARY IP y D iP ; I LEGEND THIS PHASE STAGE ZEROSION AND SEDIMENT CONTROL PLAN FOR RIVANNA VILLAGE BLOCK J(EAST) INCLUDES STABILIZATION J + / \-\ < - + OP PROPOSED LIMITS RIVANNA VILLAGE: EROSION AND SEDIMENT OF UPLAND GRADED AREAS UPON REACHING SITE GRADES. STAGE ♦ `\\7� \ IP / _ / OF DISTURBANCE LOD O CONTROL PLAN z PRACTICES SHALL BE IN PLACE UPON COMPLETION OF ROAD ! �/ \ �� / IP ••`•• CONSTRUCTION AND INSTALLATION OF STORM DRAINAGE INFRASTRUCTURE. THE STAGE Z EROSION AND SEDIMENT CONTROL PLAN FOR BLOCK G INCLUDES THE FOLLOWING \ / \ r \r \ \ \ R R - / /// • - CP `••�• O SITE BENCHMARK (PERROUDABUSH, GALEAND AMENDMENT 1 AND PHASE II MEASURES: ��#^— \ BMP I2 ` % •� ASSOC.SURVM ALBEMARLE COUNTY, VIRGINIA L.)INSTALLATION OF INLET PROTECTION AT ALL INSTALLED STORM DRAIN INLETS \- � _ _ �� \ -- / / , IP � -- IP EXISTING WETLANDS (PER KIRK HUGHES &ASSOC. SURVEY) z. INSTALLATION OF OUTFALL PROTECTION ATALL STORM DRAINAGE OUTFALLS. �� \ `F' ,yax' CD \-\ \.� \ I EXISTING STREAM CHANNEL LIMITS 3.) ROUGH GRADING OF PROPOSED PERMANENT BMPS (WET SWALES JIAND Jz) TO APPROXIMATE DESIGN ELEVATIONS,AND TS \\ �\ \ IP \` C P , I / ORK SUR �HUGHES &ASSOC. YEl PERMANENT STABILIZATION OF PERIMETER GRADES. 4.) INSTALLATION AND STABILIZATION OF PRINCIPAL OUTFALL �/ \\ / a \\ / EXISTING POND (PER KIRK HUGHES &ASSOC. WEIRS AS SPECIFIED ON THE STORMWATER MANAGEMENT PLANS _ / // �\ \\ \( \ \ BMP I 13 - SURVEY) (STAGE 3). DO NOT INSTALL FINAL WE SWALE PLANTINGS OR FINE GRADE UNTIL ALL CONSTRUCTION IN THE CONTRIBUTING i ( \ \ \ /\\ P TS I APPROXIMATE EXISTING TREE LINE SCE \\\ \ \\ \ WATERSHED IS COMPLETE AND/OR PERIMETER EROSION AND \\ SEDIMENT CONTROLS ARE IN PLACE IN ASSOCIATION WITH \ \\ j\ I \ \ \ \\ \3a&s \\\ \ ♦ DI INDIVIDUAL LOT GRADING. \\ \ \ \\ �\ `., (PER KIRK HUGHES&ASSOC. SURVEY) SITE LANDSCAPING OUTSIDE OF PROPOSED PERMANENT BMPS \\ \ \ \ ] \i \ I \ \ �� / ! -\ .I � �jL EXISTING ROAD 5.) \\ \\ \ \ I STABILIZE SWALE WITH EC-2 MATTING AND RE -PLANT STREAM SPECIFIED ON 1 / HUGHES &ASSOC. Blossom Engineering Inc. MAYBE INSTALLED PER THE LANDSCAPE PLANS (PROVIDED UNDER \ _ \\ \\ y TRIBUTARv BUFFER AS \ \ BUFFER MITIGATION PLANS (SHEET sR-3). SURVEY) SURVEY) SEPARATE COVER) ONLY AS APPROVED BY THE LANDSCAPE ARCHITECT. i ar\`.� 1 \ s j\� \ I \ \\ OP y I y EXISTING FENCE (PER KIRK HUGHES &ASSOC. Consulting and 1101 Professional Drive, Suite G Williamsburg VA 23185 6.) REMOVAL OF TEMPORARY RIGHT OF WAY DIVERSIONS AS SHOWN ON THE SITE GRADING PLANS AND STABILIZATION WITH 1 \�"n 1 \ 1 \\\ \\ \ \ / BM SURVEY) P: 757-870-4825 STABILIZATION SEED MIX AND MATTING. ALL DISTURBED AREAS / \ BMP 1 /;/ % TO BE SEEDED SHALL RECEIVE 6 INCHES TOPSOIL PRIOR TO SEEDING AND MATTING. sas y \ \ \ \ \\ \I • SEELANDSC UNDER -- �/ EXISTING BUILDING KIRK HUGHES &ASSOC. ,. , ; 7J INSTALIATION OF CHECK DAMS IN STAGE z YAW FLOW (STAGE 3 `.. �� - VE FOR S STALL E COVER FOR LANDSCAPE PLANTING INSTALLATION AND GUIDELINES REGARDING FINAL --- SURVEY) SURVEY) f '\ 1� •\ OF LOW FLOW CHANNEL WITH SUBSTRATE ENHANCEMENT (t FT CLASS i RIP RAP OVERLAIN WITH 3-6 INCH ROUNDED RIVER \\ \ \- \ \ \\ \ \ \ / y TS J I P STABILIZATION OF LOT AREAS PER THIS STAGE 2 __ PLAN SET, ALL LOTS SHALL RECEIVE TEMPORARY __ SEEDINGAND/OR TEMPORARY STABILIZATION MULCH) UPON COMPLETION OF IP MEASURES GRADING STAGE 2 GRADING ACTIVITIES, a O EXISTING POWER POLE (PER KIRK HUGHES &ASSOC. SURVEY) /,. I\ \ \, \ \` COBBLE IN LOW FLOW CHANNEL ONLY, BETWEEN CHECK DAMS). 8. COMPACTED EARTHEN BERM FORMING WET SWALE LAW HEAD \ / \ / y • - �� I Pi Fi \ \\ \ i / B M I / ` / \\ _ / j / - I "r y \ I O _-- ___ - — - — - - o 5 O EXISTING SIGN EIRK HUGHES &ASSOC. l \ - \'-) EMBANKMENT SHALL BE COMPACTED AND STABILIZED WITH STABILIZATION SEED MIX AND EROSION CONTROL MATTING (EC-2) AS SHOWN ON DETAIL SHEETS i7 AND i8. - \\ � / , , I SURVEY) SURVEY) i r / /y 9.) ALL GRADED LOTS SHALL BE TEMPORARILY STABILIZED PER VESCH STANDARDS UNTIL INDIVIDUAL LOT CONSTRUCTION IS y Y -. - _ . - EXISTING CONTOURS (PER KIRK HUGHES &ASSOC. t \� COMPLETED. y B M y / T � � //'''' W I `� SURVEY) \ \\ \ + � � �* � � O P ip � i To.) PHASE z STAGE 2 EROSION AND SEDIMENT CONTROL PLANS DEPICT ELEMENTS TO BE IN PLACE PRIOR TO CONVERSION TO - '- 4. CD r C' � I EXISTING STREAM BUFFER (PERALBEMARLE COUNTY) \ PERMANENT BMP FACILITIES AS SHOWN ON THE STORMWATER i' :� / OP KEY PLAN PLAN (STAGE 3 TO BE COMPLETED UPON COMPLETION OF LOT CONSTRUCTION AND FINAL STABILIZATION OF UPLAND DRAINAGE AREAS). PLACE HERAP ON SPILLWAY AS SPECIFIED / IN STAGE 3 SWM PLAN CD SET. + � � i I X TS • I P � O PROPOSED LOTS (STABILIZED UPON COMPLETION OF PHASE z) uJ ALL EROSION AND SEDIMENT PERIMETER CONTROLS SHALL '— SSF + \ FI CD '� BMP J1 REMAIN IN PLACE THROUGHOUT CONSTRUCTION ACTIVITIES AND REMOVED ONLY WHEN FINAL SITE STABILIZATION IS ACHIEVED. x _ _ / , _ - _ TS I _ PROPOSED LANDSCAPE PLANTINGS (SEE LANDSCAPE PLANS) STAGE 2INTERMEDIATE BMP 11 EMBANKMENT TO / BE COMPACTED AND STABILIZED PER CD / // / SPECIFICATIONS ON STAGE 3 STORMWATER PLANS AND STABILIZED WITH STABILIZATION SEED MIX AND EC-3 MATTING. ALL DISTURBED AREAS TO / ♦ O PROPOSED STORM DRAIN (SEE SITE PLANS BYALAN SITE PLANT RECEIVE SEED MIX SHALL BE FINE GRADED WITH 8 / / i / - INCHES TOPSPOIL PRIOR TO SEED APPLICATION PER / / / VESCH STANDARDS AND SPECIFICATIONS. / 0�.. P F OI ♦ P.E.) / / Li // B M l / //' �/ ^ P PROPOSED RIGHT OF WAY DIVERSION RWD O � O IP x PROPOSED SUPER SILT FENCE SSF ISSUE REV # DATE DESCRIPTION OP / - O I /J_ I P j i I O PROPOSED OUTFACE OP O #L 3/2/18 PER COUNTY COMMENTS #z 416 i8 PER COUNTY COMMENTS j �. 7 .\ 1 l /y OP I PROTECTION ,lI BMP J2 \V ��. \-\ • I IP PROPOSEDINLET PROTECTION SSF CD \ I PROPOSED BMPS J1 AND J2 STAGE EMBANKMENTS EMBANKMENTS TO CI COMPACTED AND STARILIZED PER SPECIFICATIONS ON STAGE 3 •///�� `CD �\ / _ / IREDRMEDIATEING BMP E&S) WITH GI STORMWATER N SEEDPI-ANSANDAND STABILIZATION SEED MIX AND EC 2 MATTING ALL \ DISTURBED AREAS TO RECEIVE SEED MIX SHALL BE PS I [ / 4 "� I PS PERMANENT STABILIZATION SSF NE GRADED WITH fiINCHES TOPSOIL PRIOR TO— m I :' SPECIFICATIONS. ED ON PER VESCH STANDARDS AND\ BM 4 \ - I BLOCK J (EAST) : \ LTH OF' Lr� -- I' OP s OP I\I\\O TEMPORARY STABILIZATION IN o}$�P363 y SCOTT C. BLOSSOM y Lk No. 40287 BM AND EROSION CONTROL off, MATTING sS,IO EtiyG\ NAL T OP \ O PROPOSED BLOCK LIMITS N \ \ \ NOTE: ALL PERIMETER SILT FENCE ADJACENT TO � PRESERVED STREAM CHANNELS SHALL BE SUPER Job No: 1005 Drawn By: BCE Date: 12.04.2017 Checked By: soon C. blossom, P.F. / SILT FENCE AS SHOWN ON DETAIL 4, SHEET 18. E & S STAGE 2: BLOCK J (EAST) TT/. /. NOTE: SEE STORMWATER MANAGEMENT PLANS • AREAS AND O U T FA L L /' / \ \ STAGE 3 FOR STABILIZATION PROPOSED MEASURES TO BE IMPLEMENTED IN STAGE z DURING INTERMEDIATE BMP GRADING STAGE. SCALE: 1 INCH = g0 FEET o' 50' Too' 150' •�� 3�4 E S — 12 .•�' CONTOUR INTERVAL = 2 FT PHASE 2: STAGE 2 EROSION AND SEDIMENT CONTROL PLAN (BLOCK J (EAST)) RIVANNA VILLAGE: 346 346 EROSION AND SEDIMENT CONTROL PLAN 344 344 DIVERSION SWALE JS2b 344 DIMENSIONS TOP WIDTH - 12.0 FT. 342 340 ExlsrRac GRADE STAGE 1: SEDIMENT DETMLI6,SHEEs8) \ \ nETAIL 6. SHEET as) - \ \ \ PROPOSED GRADE \ 342 340 AMENDMENT 1 AND PHASE II ALBEMARLECOUNTY,VIRGINIA 343 MAz. DEP- 2 0 F r. 12.0' E513N m' 338 \ 338 342 t i 336 is _... 336 341 .0' 334 334 3400 332 `-- STAGE LEVElrz WET SWALE PROPOSED STRUCTURAL 332 IBCE 5 10 15 20 3: (J�}� DISTANCE (ET.J (SEE STORMWATER PLANS) PILL SEE NOTES SHEET to 330 \ 330 DIVERSION SWALE CROSS-SECTION STAGE,: VERTICAL SCALE: 1" = 2' HORIZONTAL SCALE: V — 5' 328 SEDIMENTTRAP — 328 Blossom Consulting and Engineering Inc. 0+00 0+10 0+20 0+30 0+40 0+50 o+6o o+7o o+8o o+go i+oo 1+10 1+20 1+30 1+40 1+50 CROSS SECTION F-F' (SEDIMENT TRAP JSL) VERTICAL SCALE: 1"=4' HORIZONTAL SCALE 1"=20 1101 Professional Drive, Suite G Williamsburg 23185 p: 757-870-482525 340 340 338 338 336 TAGS I: SEDIMENT EXISTING TRAPS—( SEE GRADE DETAIL fi, SHEET t8) 336 334 \ 334 332 PROPOSED STRDCTDRAL PILL SEE NOTES SHEETrS 332 N �U N 330 330 328 �-PROPOSED GRADE / 328 STAGE z� KEY PLAN 3z6 SEDIMENTTRAP 326 AGE 3: LEVEL z WET SWALE (Jz] (SEE STORM WATER PLANS) 324 324 0+00 0+10 0+20 0+30 0+40 0+50 o+6o 0+70 o+So o+go 1+oo 1+10 1+20 1+30 1+40 CROSS SECTION G-G' (SEDIMENT TRAP JS2) VERTICAL SCALE: L"=4' HORIZONTAL SCALE 1"=2o ISSUE REV # DATE DESCRIPTION #1 3/2/18 PER COUNTY COMMENTS #2 4/16/M PER COUNTY COMMENTS e2 y4w Job No: 1005 Drawn By: BCE Dale: 12.04.2017 Checked By: scon c. Sworn, P.E. BLOCK J (EAST)CROSS SECTIONS ES - 13 n�EvnrH eweeawnn pmxtargecmwos aivannanEvnorya�ana nneryais�enrnoos aivannavHZ Ese_aevzeuglN�i�Vwr l; zoiaa��i:sslurouc la awaesn lxsl SEDIMENT TRAP JS3 CALCULATIONS aeo s '-'E / 4F}� -----. SEDIMENT TRAP FROM PHASE / / \ LEGEND RREQu , as cv PER ACRE zea , cv FVa .E, aaSx NORMAL Pool SURFACE rw-Axw-r B-PrH THEREQUIRE REo NORMAL POOL SURFACE AREA 1441 cr / (Das x 4 To 1,144 SF - _EXISTING T TO REMAIN DURING PHASE _ r CONSTRUCTION. TRAP SHALL BE �+ /} .4 / / RIVAN NA VILLAGE: FVOLUME2 [(NORMAL POOL SURFACE AREA+ CREST SURFACEARE4)/2]x DRY DEPTH THE REQUIRED CREST SURFACE AREA [2 x(1441 CY/ 2"ll 1144 SF 27453E M N MUM FLow PATH LENGTH 6o FT FFFFCTVE wDTH NORMAL POOLEURFACEAREA/LENGTH 1144/60 19.11 _ ,- - CONVERTED TG STORMWATER BMP PER PHASE i PLANS UPON STABILIZATION BLOCK H OF CONTRIBUTING WATERSHED SB1 / -, V 1 PROPOSED LIMITS ' • OF DISTURBANCE EROSION AND SEDIMENT CONTROL PLAN M N MUM LENGTH LO w DTH RAT O LENGTH / EFFECT VE W DTH so 119., = a:, DIMENBIONS'. NORM ALPOOLSURFACEAREA 1144SF ELEVATION MINIMUM FLOWPATHLENGTH 6o Fr a4e MINIM UM EXCAVATION DEPTH 4FT BOTTOM ELEVATION 342 BANK zFrELEVATON aso _ * ------... -_ __ _ / - - 35 g------- --- i F ./ r I I I (IT'E BENCHMARK PER RGUDABU ALE AND O SH,G AMENDMENT 1 AND PHASE II ALBEMARLECOUNTY,VIRGINIA MN MUM BERM TOPw OrH 3Fr Sae EIGHT V'N MU WEE 2FTE MNMUMF -I N ,s=,za Fr MNMUM -xcnvAT ONs M N MUM EMBANKMENT SIDE SLOPE 31 ----- 5 // C \---_ ___ - -� / -- \x /� 9 SC / / EXISTING SEDIMENT BASIN FROM I - ASSGC. SURVEY) � EXISTING WETLANDS KIRK HUGHES &ASSOC. O SEDIMENT TRAP JS4 - - T PHASE iTO REMAIN UNTIL FINAL CONVERSION TO BMPD \ SURVEY) SURVEY) OALCULATIONS DA , E ACRES RFQu RED STORAGE , 34 Cv PER ACRE 175.E Cv F V POOLACE / '#1 �/ / \ �_i / / O \ 3 / \ 1 �,, \ EXISTING ® STREAM CHANNEL LIMITS N-Qu RED NONMT�POOL A-RMAL AREA a e cr / (o es x a ET] as7 SF �vowM-2 [(NORMAL Pool suNEAc-AREA+CREST suRFAc-AREA)/z)x Bav DEPTH THE REQUIRED CREST SURFACE AREA [z x (a7.a cv / z FR( fia7 sE 1 s74 sF 145 FT MINIMUM FLOW H -NORMAL EFFECTVELEN WIDTH NORMAL POOL / LENGWI 697 / 1 a5 4 e - ,-, x EXISTTRAP FROM ---- • �+ ST PHASE T (HST) TO REMAIN s `-- - -- O - DURING PHASE 2 CONSTRUCTION S (PER KIRK HUGHES & ASSOC. SURVEY) EXISTING POND - LENGC / EFA MNMUM LENGTH TOW DTH NATO LENGTH /EFFECT VEWOTH ,45I4.8 30'., MIN30 DIMENSIONS. s � � . ___ `� _ _ /� - - - - \ \I ` (PE KIRK R HUGHES & ASSOC SURVEY) NOR MTLPooLsuNFAc-AR-T 6975E ELEVATOR 33s MNMUM FLow PATH LENGTH 14s Fr+ MIN MUM EXCAVATOR ATI 4 Fr eorroM ELEvnnoN aa2 BANK HEIGHT 2 FT ELEVATION 338 MINIMUM BERM TOP WIDTH 3Fr s + _ • / \ 3 5 t p U — - -., - - - / ,1 ` \ ! APPROXIMATE EXISTING APPROXIMATE E LINE OUTLL HEIGHT 2FT EVATON 336 E 2 N UM WEIRLENGTH6 6x,.31 -aFT M N MUM EXCAVAT ON 3 MINIMUM EMBANKMENT = a.1 (/` x \ - -- "� BM 347.0/ + x / x + x __-- /, / / I _ x (PER KIRK HUGHES & ASSOC. SURVEY) CE SEDIMENT TRAP JS5b �44.6 x x x / / (pgR KIRK HROAD GH ES &Assoc. SURVEY Blossom consul `Inc. suiting and Engineering In CALCULATIONS DA I ESACRES REQUIRED STORAGE ,3a Gr PERACRE 2o50Cv LI— �I� �i " w �" O HWD -� -i _'# - + -_ VA 3185 $Ulla G 1101 Williamsburg Wllamsbu�VA 23185 F VOLUME o.95x NORMAL SUREACRFACE AREA xwETS 85. THE REQUIRE NORMAL Pool suRFAcs AREA ,o2s cv/1o.85 xa Fr) 6,a., sF '� .o---o^ - I \+ �� ;' OP - / ` * _ �-------___ � _ EXISTING FENCE (PER KIRK HUGHES &ASSOC. O P 757-870 825 KEY PLAN HEREUIR [(NOPMALPODLaERFAo=2.GR-a2FDRFT)jF-AA�)121xDRY DEPTH _ THE MUM FL oCREST LENGTH- AREA [zx(, oz scv/z ET77 a1a, SF ,ssa.a sE \ x _x I _ SURVEY) MIN MUM ELow PATH LENGTH as ET 1 ---- EFFECTIVE WIDTH NORMAL POOL SURFACE AREA/LENGTH 8141/46 1e1E-r x / OP \ <fl+�+ EXISTING BUILDING MINIMUM LENGTH TO WIDTH RATIO LENGTH/ EFFECTIVE WIDTH 451181 2S1 DIMENSIONS. NORMALPDOL suRFACEAR-A as411 BE-L-VATON 348 LO PA LENGTH .': / -- / / /� / (PERKIRKHUGHES& ASSOQ SURVEY) aMANivRHEREaM To EL_ATONT aso orroM SLsvnnoN aaa Mo ELEVATION 346 MINIMUM WEIRRLETION 6x DA 6x1.53 92 FT LMD HWEIR LENGTH / ST / /' / / / t\ JS3 x / \ �Y EXISTINGCONTOURS (PER KIRK HUGHES & ASSOC. SURVEY) I \\,\, �, \•\ \ MNMUM ExcnvAT oN s OE SLOPE 2, MIN:N MUM EMBANKMENT S DE SLOPE - 3'1 CLEAN WATER DIVERSION JS5ab CALCULATIONS AT2 DO CIA�•` / " \ CiFiS (+ ` / / �� EXISTING STREAM BUFFER\ (PER ALBEMARLE COUNTY) \ \�> Eq ACRES c 2,(Mx-ouNousHJ \ SF ROV PUTDWITHLE LENGTH 0`7AN SLOSGNANBs-0MDNTcoNTNOLrwNosooK WITHHLENGH FT ANDSLOPEOF 0042 0.250 HOURS ♦ _ _ - \ ROVERLCW n sHALLow wITH LENGTH of z21 Fr AND SLOPE of o 04s o 01 Houas OF2210 LENGTH MINUTE FTAND SLOPE OF o.1 o4 0.00 ou s T CH0-HO HOURS To 02G9HOURS 1G_13 THMNUTES \ ♦ + i DA JS3 o Z _ \ ` / J 2.15 AC TI INSTALL TEMPORARY SEDIMENT TRAPS IN ��H L-. LOCATION OF FUTURE J3 AND J5 BMPS PER /`,I" "'DESIGNO OUTFACE OUTFALL PROPOSED DIVERSION DIKE `. \ \ \\ US NC Nonas PRECIPITATION FN-ou-Ncv DATA SERVER mnp /mesc.Ews.Eosa.9ovme>wromxn, 10 M NOTE z vR a sa NCHEs-U. • \ " X DEPICTED HEREIN. INSTALL CTEDHFIN.NSTAL PROTECTION AT DIVERSION OUTFACESAND / ,\ 10 MINUTE 10 vR' s25INCHESMOUR 2 YR PEAK FLOW 0.21 x 3 9B x 2 09 1 74 CFS m vR PEAK FLOW oz,xersxzos 2.3 cFs " • \ �� \ * SF - , �'�\ � ` I AT OUTFALL OF PROPOSED SEDIMENTT RAPS 1 PER DETAILS ON SHEET L7 AND ffi. PROPOSED CLEAR WATER CWD O / ,• ' SLOPE OFPROPGSEDCHANNEL RSE/RUN 25ET/404F 0062 F ' `.:T i-. 3 35... � �.. �' DIVERSION �T� _ / - MAx PERM ss aLE VELOCITY of EC-2MnrrlvGv 40 ETre LSE 2.7 ET5) � MINIMUM FLOW AREA W-Q/V-1.9/2.7-0.7 SOFT ♦ \ 1 ww *0w \ DESIGN DEPTR E) 2FT `♦ e OEs GN ROFTEM w DTH (b)4 Fr -. \ ,.. - ___--- I O PROPOSED SUPER SILT FENCE SSF GIVEN 51 SIDE SLOPEe 2FTxtl 2Frx2 - z a/e aFT/2 FT z RDLLL- TDNT TR TPE2DDTLCHANNELG EA(A, (bxs+axK'2), \ ♦ .;. - -- _ - ♦ _ _a __-.. BLOCKJ (WEST) (4 FTx2 Fo+[2 x(12 F-H-211 ,a OFr TNAPD2o GAL CHANNEL TOP WIDTH b+(2 x exz) 4ET+IS x2 FT x z) 1z Fr TRAPEZOIDAL CHANNEL HYDRAULIC RADIUS(R) \ \ \ _ - ` \ U \ • / ---- \\ � - � \ i - - / PROPOSED STOCKPILE WITH TER Is (SIC PERIME CONTROLS T SIl :{(bxb)+[Zx(E^2)pl(b+l(2.dxp2^2)+l)-(I2)]II CHANNEL LINING VEGETATED WITH EC-2 MATING \�\\ _ ♦ --- ` VVVI -- --- PENCE) PERMSSBLE VELOCITY OF040 ET5 (VDOT APPROVED MATERIALS AUGUST 2014 SECTION 57) V IQ r els/ApP,�tl Lsls.pery urcesrON (iF THE - ___ ♦ / i /x'� • i xx- --_ - - � I PROPOSED CONSTRUCTION O ENTRANCE CE VEV RETAR ANC CLASSIFICATION - USING TABLE 5130F THE VESCH RETARDANCE CLASSIFICATION C USIN PLATE 5290F THE VESCH ROUGHNESS COEFFICIENT (n) 0.0E4-- ` �• �' � _ qxx.� ____ II MAX CAPAC TV FLOW ,L49cF)L [R (zr3px[s-ryRpxT ry.a9/o.oaa7xC z3 ^Izr3nx(O 06z^ryrzp xTe Mnx cAPAcnvELoc Tv R4a/n)xlp^(zlal)x[S^a2)) (14a1004nx112a^(J3)]xmoE2'F'z] s.7FTSNSSSFDIMENSIONS xx .. ' •` / , , i^ �� V OP /- '� r �\�_/ PROPOSED TEMPORARY i STREAM CROSSING TSC ISSUE �x MNMUM BOTTOM W DTH 4 FT MNMUMBEPTH WID MNMUM SOE SLOPE 2.1 ` -- ♦♦ \ - BM VI I SC --'�. - ��___ -. �' -:... PROPOSED SEDIMENT I— ST AVERAGE CHANNEL SLOPE 0.062 _ -� _ ♦' _ ' -°' � _ � A REV# DATE DESCRIPTION LINED - VEGETATED WITH EC-2 MATTING NOT-: sss sHssr,s FOR ADDITIONAL DIVERSION DIKE SIZING INFORMATION �� 'Y -� #2 ., ♦ �� x � x x - OP ` SSF �\ m �4 JS5b '-- � ` DV ` \ \ \ PROPOSED SEDIMENT BASIN S$ O 3 z T8 PER COUNTY COMMENTS #z q/i6/T8 PER COUNTY COMMENTS ' ` ,u N NOTES AND CONSTRUCTION DV � s � - ..x _ PROPOSED CONSTRUCTION ROAD STABILIZATION CRS SEQUENCE � -- � � � '�— ` � — � M � � OP PROPOSED CONSTRUCTION FINAL LOCATION OF ALL CONSTRUCTION ACCESS & PROPOSED ST ---- �- T'3T AC JS4 \ '� �\� r ACCESS ROUTE (USE DUST CONTROL STAGING &STOCKPILE LOCATIONS TO BE APPROVED AND PER VESCH 339) CONFIRMED WITH ALBEMARLE COUNTY AND PROPERTY OWNER \ PRIOR TO CONSTRUCTION AND IS THE RESPONSIBILITY OF THE CONTRACTOR TO COORDINATE. r. CONTRACTOR TO PERFORM ROUGH GRADING WHERE SHOWN I • x I �r �' `\ ` ` ♦` OW DA JSSb - ♦♦ - - - / \x �\x �+ //••.� PROPOSED RIGHT-OF-WAY DIVERSION RWD O Nl F {�� TH 0 Gf� ON THIS SHEET. z. ALL DENUDED OR DISTURBED AREAS TO BE PERMANENTLY 10, SSF /x O /i••I •• G1 STABILIZED IMMEDIATELY AFTER FINAL GRADE. ` �'• `3� -__ x ��•' SCOTT C. BLOSSOM \� `. / x : /• f NOTE: ALL PERIMETER SILT FENCE ADJACENT PRESERVED STREAM CHANNELS SHALL TO BE SUPER Lic. No. 40287 'col, � ''♦� /j••/• � ` SILT FENCE AS SHOWN ON DETAIL 4, SHEET 18. 1'SSI NOTE: ALL CLEAR WATER DIVERSIONS SHALL TERMINATE INTO OUTFALL PROTECTION (CL 1 RIP ♦� x � I•• ORAL RAP MIN LENGTH 20 FT). ``.... - ._ /j•'/•• NOTE: ALL CLEAR WATER DIVERSIONS SHALL ' •♦\ ` /} _ ;i•• / • TERMINATE INTO OUTFALL PROTECTION (CL 1 RIP NOTE: ALL SILT FENCE AND SUPER SILT FENCE SHALL BE A MINIMUM OF 5 FT FROM STREAM _---' I •♦ �} x i • • RAP MIN LENGTH 20 FT). Job No: 1005 Drawn By: BCE BANKS. NOTE: TO INSTALL CLEAN WATER DIVERSION JS5a _ 1 ` yI 1 ♦♦` / x / x ..� /•• CONTRACTOR TO INSTALL TEMPORARY CLEAN / x WATER DIVERSION UP SLOPE OF PROPOSED LOT d N Dale: 12.04.2017 Checked By: scon C. Blossom, P.E. E&SSTAGE I'BLOCK J(WEST) THE CONTRACTOR SHALL CONSTRUCT A SMALL (i / x ♦♦` GRADING TO DIVERT RUNOFF FROM OFF SITE FT HEIGHT) BERM ACROSS THE SHALLOW, POORLY DEFINED SWALE AND CUT THE HIGH POINT * 1 •• CONTRIBUTING DRAINAGE AREAS AROUND THE DISTURBED AREAS DURING CONSTRUCTION. RIGHT OF WAY DIVERSIONS TO REMAIN IN PLACE BETWEEN THE SWALE AND THE OUTFALL TO CREATE POSITIVE DRAINAGE TOWARDS THE ' UNTIL DISTURBED AREA IS STABILIZED AND - SCALE: 1 INCH = SO FEET ' STORMWATER INFRASTRUCTURE IS INSTALLED. EXISTING WETLAND SYSTEM. PHASE 2: STAGE 1 EROSION AND SEDIMENT CONTROL PLAN (BLOCK J (WEST)) 01 50' TOo1 150' NOTE: SILT FENCE SHALL NOT BE INSTALLED ACROSS SPILLWAYS. CONTOUR INTERVAL = 2 FT RLePATH.c.wserswnnOmolwx ry wos Rlve.�rve a ie v carnoos_arvenne Hz_eu aEvz<,reIHIUIM„x, 2u,ee,,,:sali,. E6 eIK.exa, (,1 PHASE 2 STAGE _2 BLOCK J (WEST) / •tea CID� yr LEGEND \ RIVANNA VILLAGE: THIS PHASE 2 STAGE z EROSION AND SEDIMENT \ /�� '�� \ \ \\ PROPOSED LIMITS OF DISTURBANCE LOD O EROSION AND SEDIMENT CONTROL PLAN FOR RIVANNA VILLAGE BLOCK J (wEST)INCLUDES STABDazATloxoFUPLAND GRADED AREAS UPON BEACHING SITE GRADES. STAGE 2 PRACTICES SHALL BE IN PLACE UPON BLOCK �� /' _- 352.9 / � � �v X Z F O __. f I f 3 J \ \^ \\ I `v�� \\ \( \ \ \ \\� \ \ \\ \ \ \ \ \\ ` \ O SITE BENCHMARK (PER ROUDABUSH, GALE AND CONTROL PLAN COMPLETION OF ROAD CONSTRUCTION AND \` / / \ \\ I \ \ \ \\ \ 1 \ \\ ASSOC. SURVEY) AMENDMENT 1 AND PHASE II INSTALLATION OF STORM DRAINAGE INFRASTRUCTURE. THE STAGE 2 EROSION AND SEDIMENT CONTROL PLAN FOR BLOCK G INCLUDES I P /STAGEZINIRRMEDIATE BMP Hi \\ \ EMBANKMENT TO BE COMPACTED AND 1 \\ f \\ , A\ \Sass \\ \\ �\j \\ _ \ \� -- f .°. O EXISTING WEI7.AND5 (PER KIRK HUGHES & ASSOC. ALBEMARLE COUNTY, VIRGINIA THE FOLLOWING MEASURES: iJ INSTALLATION OF INLET PROTECTION AT ALL j ,.. = 'y STABILIZED PER SPECIFICATIONS ONSTAGE 3 _ STORMWATER PLANS AND STABILIZED WITH 7 \\\ STABILIZATION SEED MIX AND EC-3 MATTING. 1 \ \\ f \\ i ',• SURVEY) EXISTING INSTALLED STORM DRAIN INLETS 2.) INSTALLATION OF OUTFALL PROTECTION AT ALL STORM DRAINAGE OUTFALLS. RR ,.. ALL DISTURBED AREAS TO RECEIVE SEED MIX q- A * \ SHALL BE FINE GRADED WITH 6INCHES \\ TOPSPOIL PRIOR TO SEED APPLICATION PER -_ B VI VESCH STANDARDS AND SPECIFICATIONS. 3as \ '-' \ �\ (\\ 1•<s \ ® STREAM CHANNEL LIMITS (PER KIRK HUGHES & ASSOC. SURVEY) EXISTING POND 3.) ROUGH GRADING OF PROPOSED PERMANENT BMPS (BIORETENTION FACILITIES J3 AND J5) TO APPROXIMATE DESIGN ELEVATIONS, AND R R R R L °e. \ OP ' \ — — / \r f �� \\\ \ W E \ \\ (PER KIRK HUGHES & ASSOC. SURVEY) PERMANENT STABILIZATION OF PERIMETER GRADES. STABILIZATION OF — �_ ' :: _ - _ -.' __ ,+,� -� I \ \ 34 Z 2 1�, x / \\ \ \ \ I APPROXIMATE EXISTING TREE LINE (PER KIRK HUGHES & ASSOC. DICE q.) INSTALLATION AND PRINCIPAL 1J R R OUTFALL STRUCTURES AND EMERGENCY SPILLWAYS - _ / \\ \ \ \ / P + I I _ AS SPECIFIED ON THE 0 \ AAVA �y �� // �' SURVEY) EXISTING ROAD PLANS (STAGE BIORETENTIO3). DO NO INSTALLS OR FINAL GRADE UNTIL P * - BM X X7�+ / X X �� x _i RR O P / II ��' \\ \�, vvv � (PER KIRK HUGHES & ASSOC. SURVEY) ALL CONSTRUCTION IN THE CONTRIBUTING WATERSHEDIS COMPLETE AND/OR PERIMETER EROSION AND SEDIMENT CONTROLS ARE IN PLACE IN � pp ' I x �� ' � r - / ..; � I �* \ �-- \�ii � �� -- —� _ _— EXISTING FENCE KIRK HUGHES & ASSOC. BloeSom Consulting and Engineering Inc. 1101 Profess onal Ddw, Suite G Willi —burg VA 23185 ASSOCIATION WITH INDIVIDUAL LOT GRADING. =o - _-_ / (PER SURVEY) P 757-870-4825 5.) SITE LANDSCAPING OUTSIDE OF PROPOSED ^ i' -- _ \ F� KEY PLAN PERMANENT BMPS MAY BE INSTALLEDPERTHE l\ \ ) �4. BVI - / LANDSCAPE PLANS (PROVIDED UNDER SEPARATE "�-� -. ,, ., �,� -- 33�• EXISTING BUILDING KIRK HUGHES&ASSOC. ® COVER) ONLY AS APPROVED BY THE LANDSCAPE ARCHITECT. / ..,.j,� + /+ — \_.:.... ... ,,; N ' v: �+ �} \ �� ,-....... +.. + / \3 3 ` 2 �. OP SURVEY) SURVEY) EXISTING P 1. �, \ 6.) REMOVAL OF TEMPORARY RIGHT OF WAY DIVERSIONS AS SHOWN ON THE SITE GRADING PLANS AND STABILIZATION WITH STABILIZATION SEED MIR AND MATTING. ALL DISTURBED AREAS TO BE SEEDED SHALL RECEIVE 6INCHES TOPSOIL PRIOR TO yam' �:�" i I P � •' ` �P O • + 7 \.f. \ \ x \\ ` " \r CD • CI �/ O A (PER KIRK HUGHES & ASSOC. HUGHES SURVEY) EXISTING SIGN \ -\••% -� SEEDING AND MATTING. �, \• / SSF I— O O (PER KIRK HUGHES & ASSOC. SURVEY) �• 1 7.) INSTALLATION OF CHECK DAMS IN LOW FLOW CHANNELS OF EACH WET SWALE, AND STAffiLIZAITON OF LOW FLOW CHANNEL WITH ,, V I \, / �_ ,- X x W . E • + -` 357.. 3 40 . 9 / � I / / O D EXISTING CONTOIIRS ' �' SUBSTRATE ENHANCEMENT i FT CLASS L RIP RAP OVERLAIN WITH INCH ROUNDED RIVER COBBLE i \ ( - "'mom (PER IQRK HUGHES & ASSOC. 3-6 IN LOW FLOW CHANNEL ONLY, BETWEEN CHECK _ , 1 % ) ) 3 5 0 5 l DAMS). S.) INSTALL RETAINING WALL ADJACENT TO BMP IS / \\ Ix �. ;G TS \ -_ SEE LANDSCAPE PLANS PROVIDED UNDER O i; , B M / EXISTING STREAM BUFFER (PERALBEMARLE COUNTY) CONCURRENT WITH ROAD GRADING AND ` �, > ... '�\, , - I SEPERATE COVER FOR LANDSCAPE PLANTING INSTALLATION ANDDELINFS REGARDING ' GUI INSTALLATION OF STORM DRAIN INFRASTRUCTURE. ROUGH GRADE BIORETENTION SIDE SLOPES AT BASE OF RETAINING WALL AND STABILIZE WITH EC-2 MATTING. \ ` ' • TS �- ' \ FINAL STABILIZATION OF LOT AREAS. PER O :-f '- THIS STAGE 2 PLAN SET, ALL LOTS SHALL \ \ X / RECEIVETEMPORARY SEEDING AND/OR n —'` " ,_ 0 PROPOSED LOTS (STABILIZED UPON COMPLETION OF PHASE z ) 9.) INSTALL RIP RAP ON DOWN SLOPE SIDE OF J3 COMPACTED EARTHEN BE CONCURRENT WITH • ' ` ` �� " \ TEMPORARY STABILIZATION MEASURES (LE. \ * `_�" MULCH) UPON COMPLETION OF STAGE z \ GRADING ACTIVITIES. / �� _, (O P _ PROPOSED LANDSCAPE PLANTINGS STABILIZATION OF RIGHT STREAM RANK AS SHOWN � � •` � P (SEE LANDSCAPE PLANS) ON BUFFER MITIGATION PLANS. CLASS i RIP RAP BANK PROTECTION SHALL BE INSTALLED TO in YEAR WATER SURFACE ELEVATION. INSTALL CLASS i RIP RAP (MIN DEPTH z.z FT UNDERLAIN WITH • I P •` - \ i : \ \ - \ I ''\k \ _ _ + M } 11 / , O PROPOSED STORM DRAIN (SEE SITE PLANS BYALAN GEOTEXTILO FILTER FABRIC) AT UPSTREAM AND • • _ T v i �+ ♦ FRANKLIN P.E.) DOWNSTREAM WING WALLS OF PERMANENT BRIDGE CROSSING WHEN INSTALLED. SEE BRIDGE PLAN PROVIDED UNDER SEPARATE COVER. \ • \ - :� . 3 �� ,ff c ,_��--_ x- _- i` 'v - I / `S`SF ` PROPOSED RIGHT OF WAY DIVERSION RWD O io.) ALL GRADED LOTS SHALL BE TEMPORARILY STABILIZED PER VESCH STANDARDS UNTIL INDIVIDUAL LOT CONSTRUCTION IS COMPLETED. ; • `- • \ �y V "`�•: _ , l T O P R `. -,__ / "`K --'y' I u v `F � T `i' I * PROPOSED SUPER SILT FENCE SSF O ISSUE u.) PHASE 2 STAGE 2 EROSION AND SEDIMENT CONTROL PLANS DEPICT ELEMENTS TOBEINPLACE PRIOR TO CONVERSION TO PERMANENT BMP _ `" �` — �\ T T� \ REV# DATE DESCRIPTION FACILITIES AS SHOWN ON THE STORMWATER PLAN ` OP / \ SSF - / T T T T `I� BM Y' PROPOSED OUTFALL PROTECTION OP O #i 3/z//S PER COUNTY COMMENTS #2 q/L6/L8 PER COUNTY COMMENTS (STAGE 3 TO BE COMPLETED UPON COMPLETION OF LOT CONSTRUCTION NAL STABILIZATION OF •` - ��// T U `' u' ,� I T UPLAND DRAINAGE AREAS). —) ALL EROSION AND SEDIMENT PERIMETER ` I P / TS O P - =`J",r� \ o / �� \ T �/ � C IP PROPOSED INLET PROTECTION CONTROLS SHALL REMAIN IN PLACE THROUGHOUT - - ••`. I P BM , CONSTRUCTION ACTIVITIES AND REMOVED ONLY WHEN FINAL SITE STABILIZATION IS ACHIEVED. - 1 a, � _ - P \ � - t T T T PROPOSED GRADING D( TAGE 2 F&S) \ w •� IP RkS� a'�^ PROPOSED CLASS t RIP RAP (MIN DEPTH 2.2 FT) • TS ......� n , -. : .I'�/•• \ TEMPORARY STABILIZATION SPL Ix of 1y�Gf+P G' �� SCOTT C. BLOSSOM Idc. No. 40207 STAGE EMBANKMENTS TO BE E BMPS J3 AND JS EMBANKMENTS TO HE COMPACTED AND ' .. I ` I •• \ $M PROPOSED SEEDING MATTINGSION CONTROL 4 �SSyONAL'G~ STABILIZED PER SPECIFICATIONS ON STAGE ' •` '. //'� \ STORMWATER PLANS AND STABILIZED WITH CLASS I RIPRAP (MIN. DEPTH 2.2 FT). ALL - a• • \ / • • / • , \ NOTE: ALL PERIMETER SILT FENCE ADJACENT TO DISTURBED AREAS TO RECEIVE SEED MIX SHALL BE FINE GRADED WITH 6INCHES TOPSOIL PRIOR TO SEED APPLICATION PER _" •� A ,. ,.. �' - • `� ' -." •• '� ^C '� V ,,., - \ PRESERVED SILT FENCE STREAM CHANNELS SHALL AS SHOWN ON DETAIL 4, SHEET BE SUPER 18. VESCH STANDARDS AND SPECIFICATIONS. ` .%' \ N Job No: 1005 Drawn By: BCE ••� W _ STAGE i SEDIMENT TRAP SHALL BE CONVERTED TO A SWALE AS SHOWN ON THE STORMWATER PLANS. STABILIZE WITH EC-2 \ Dale: 12.04.2017 Checked By: scan c. Blossom, P.E. �/' ••` MATTING AS SPECIFIED ON STORMWATER \ \ E&S STAGE 2' BLOCK J WEST (WEST) PLANS. ••� SCALE: 1 INCH = 5o FEET V O' 50' 100' 150' n�EanrH.c.wse,swnnamom. ry was aive.narvE a e y caowos_arvenne Hz_Esc_aEv2nv.'al��i�IM„2, PHASE 2: STAGE 2 EROSION AND SEDIMENT CONTROL PLAN (BLOCK J (WEST)) za,ae,,,:sal� 111 Es eiK.rxat(2) CONTOUR INTERVAL = 2 FT C �+ _ � G C J J DIVERSION SWALES JS5b, JS4 3440 0 0 0 0 0 0 0 0 0 0 0 0 00 343 342 Omni mommm 341 3400 5 10 15 20 DISTANCE (Fr.) DIVERSION SWALE CROSS-SECTION VERTICAL SCALE: 1" = 2' HORIZONTAL SCALE: 1" - 5' ■■■■■ DIVERSION CHANNEL JS4 CALCULATIONS: IONAL METHOD 0 -CIA C = Ob0 (ROUGH BARE SOIL) U[E�6�DTMOVRLAOWGhOF0FT AND SLOPE OF 0.080=0.011 HOURS T[ SHALLOW WIh1 LENGTH OF 142 FT AND SLOPE OF 0.1 E9 = 0.006 HOURS USING NOAA'6 PRECIPITATION FREQUENCY DATA SERVER mnP:/mane. nwe. noae.9wmaac✓P1een, INCHEsmouR io nMnlinNiu�10-vai 3snINCHEsrHouR SLOPE of PRorosso CHANNEL =RISE /RUN = , c Fr/ zs, Fr = ooa - Fr5 (USE 2.] FT5) MINIMUM FLOW AREA (A) = O / v = 3.a1.26 SF YrH (d) = z Fr DESIGN BOTTOM WIDh1 @) = 4 FT GIVEN 2'.1 SIDE SLOPE,e=2FTxe=2FTx2=4FT =eaa aFr /z F>NEz TR EW=@xN +Izx(e^2p =(a FT x 2 FD + [2 z ((2 FD^2A )]' , 5 SOFT TRAPEZOIDAL CHANNEL TOP WIDTH = b + (2 x tl x TR PEzolDn�cHuINE�H�oanuuc RADIUS (m -{lbxd)+ax(e^2)O Nb+{2xex[((Z^2)+1)^(1nHL =1(ax2 )+[2x(2^2)11/14+{I2x2x[((212)+,) ^ (, n)ll} CHANNEL LINING = VEGETATED WITH EF2 MATTING, FT5 (WOT APPROVED MATERIALS, lU1GUST 20, 4, SECTION 5]) mno:/nww.u,relmaern.or9roeelnaaana0oe�aaMarenalvAaam+� uam.aeD USING TABLE 5-13 OF THE VESCH, RETARDANCE CLASSIFICATION- C USING PLATE 5-29 OF THE VESCH, ROUGHNESS COEFFICIENT (n) = 0.044 FLOW =(,.a9/n)x[R^125)]x[s^(, /z)]xA - 1, .4a / o.0a4) x D.23^(25)1 z [O.Oa^(t/ql z, s 9.9 CFS MAX CAPACRY VELOCIT' = D 49 / n) x IS ^12/37] x [6 ^0/�I = (1.49 / o.oa) x [1.23^(z/ p x [0.04^(,2p =].s FT5 DIMENSIONS: nM aorroW9 M DrH - a Fr lliMUM DEPTH = '721 MINIM�UGE CHANNEL SLOPE = 0.09 LINING =VEGETATED WITH EC-2 MATTING DIVERSION CHANNEL JS5b CALCULATIONS RATIONAL : OD, O -CIA =,.53ACRES 0 50 LARTE3 5 1 AND 6 2 0 USING[ OVERLAND WITH LENGh1 OFTM00 FT AND SLOPE OF 0.05= 0.011 HOURS T[ SHALLOW WITi LENGhI OF 105 FT AND SLOPE GF 0., 24 = 0.005 HOUR6 REauENcv DATA SERVER mn:/meno.nwn.noaa.9o"mawnlenp, - eINCHESMOUR 10o MINUTE IO-YRi 35.251NCHESMOUR 1 0-VR PEAK FLOW FLOW OSOx 3.98 z,'53=3.0 DES - RISE / RUN =,6Fr/nsFr=o99, - 4.0 Fi5 (USE 2.] FT5) MINIMUM FLOW AREA WOI � / v ES-2 MATn 25 SOFT DEPTH (e) = 2 FT DESIGN BOTTOM WIDh1 = 9 FT GIVEN 2.1 SIDE SLOPE ,e=2FTxe=2FTx2=4FT =ee0 LT 4F/2 E2 TR EAW=@xN+[zx(d^z)] =(a FT .2 FD +N[2 z ((2 FD^2)] = 16 SF TRAPEZOIDAL CHANNEL TOP WIDTH = b + (2 x tl x ZI - +(2 x2 FTxn=,2 Fr TR PEZOIDAL CHANNEL HYDRAULIC RADIUS ={(bxe)+ax(tl^2)0lib+{axtlx[(a"z)+1)^(1n)1H =1(axz)+[zxIS- z)➢I(4+ilzxzx[((z^z)+,) ^ Dn)ll} CHANNEL uNlnlc = vscETATED WITH Ec-3 MATnnlc, SSIBLEFT5 (vooT APPROVED MATERIALSFLOW , AuousT za, a, SECTION s� mnP://www.z�,a�n�aa�, �,9roes�n,,,am�oe,oasm4arenala/Aaam+aa uam.aen USING TABLE 5-13 OF THE VESCH, RETARDANCE CLASSIFICADON = C uswc PInTE 5 -2 9 of THE v6scH, RoucHNEss coEFFICIENT (n) = 1144 =ry.a9 / nl x [R^(z5)] x [s^(,/ J] x A - a.4a / 0.0441 x D.z3^(2/ I x m.091^nm, x ,fi =18].fi CFS MAx CAPACrry vELDDITv = R A9 / n) x IR yz5➢ x [s ^ Oml _,,.] Fi5 DIMENSIONSM: aorroM W9DrH - a Fr RAGE CHANNEL SLOPE = 0.091 LININGllnlc = vEGETATEO WITH EC-2 MATTING 344 344 34z 342 STAGE 1: SEDIMENT 340 340 _ GRADE TRAP SPILLWAY (SEE �EXISTAIG PROPOSED DETAILS , SHEET tS) 338 _ TAEILTZATION 3 338 SEEDING 336 336 PROPOSED GRADE 1 �-PRoeosED 334 334 RTRucI'uRAL EL LLSEE 33z STAGE ,: SEDIMENTTRAP iN(H'ES:iHE ET e 332 33- 1330 o+oo 0+10 o+zo 0+30 0+40 0+50 0+60 0+70 o+So o+qo 1+00 1+10 1+20 1+30 1+40 1+50 1+60 1+70 1+80 1+90 z+oo z+oo CROSS SECTION N-N' (JS4) VERTICAL SCALE: 1"=4' HORIZONTAL SCALE 1"=20 356 354 352 350 348 346 344 z 356 354 352 350 348 346 344 34 342 0+00 0+10 0+20 0+30 0+40 0+50 o+6o o+7o o+80 o+qo 1+oo 1+10 1+20 1+30 1+40 1+50 CROSS SECTION M-M' (JS5b) VERTICAL SCALE: 1"=4' HORIZONTAL SCALE 1"=20 J54 352 350 348 346 344 342 340 338 o+ you 360 358 356 354 35z 350 348 346 344 34z STAGE I: SEDIMENT TRAP SPILLWAY (SEE DETAIL 6, SHEET IS) PROPOSED EC-2 MATTING PROYOSED- [SEE L9,-3, SHEET µ) / DETAT I / SPAETGZATION `PROPOSED STROLTDR4L SEEDING FILL SEE NOTES SHEET t8 - APPROX4IATE I STREAM (O}G1NNE SEDIMENT TRAP III III III III CROSS SECTION L-L' (JS3) VERTICAL SCALE: 1"=4' HORIZONTAL SCALE 1"=20 354 352 350 348 346 344 342 340 338 ;o 360 358 356 354 352 350 348 346 344 342 0+00 0+10 0+20 0+30 0+40 0+50 o+6o o+7o o+8o o+qo 1+oo 1+10 1+zo 1+30 1+40 1+50 CROSS SECTION O-O'(Hi) VERTICAL SCALE: 1"=4' HORIZONTAL SCALE 1"=20 E&S FACILITY (ST AND SB) STAGE -STORAGE SUMMARY R�7®� r�7RM1� STJS2a N:levatlon t'1 Al+A2+(AI'A2)V2 VONIIIe (lrmlative (:mmlatNe Vo01me ((it) Volmre AC-tt 332 0.00 0.00 0.00 0.000 334 a 5,15247 3,434.98 3,434.98 0.079 336 ],56515.5,1134.76 %.671.7d 1119d 338 10260.84 684056 14312.30 0.352 STJS1b Ekvallna Area(sn AL+Az+(AI"A2)IftvalmaeaE.-ec(C� Vokmle (CE) Volume (-ttl i U.1111 11111 II.(Ifl 8,390.$1 5,493.88 4,59388 0128 11,106.16 7.404.10 12,997.98 0.298 3.36 .5,252.110 11.121 16,135.3N 9,423.59 22,42157 1) "1 Ekvatlon LET)Arca (BN) Area �� STJS3 AI+A2+(Al"AS)1/2 Volume (CTVolmn CumOathe Cmm,latMc FEE)Volomr (AC-8) 342 299 60 2.117 o.DD o_oD o oc o IN 34A 756.70 0.01] 1,532.44 1,021b3 L02163 0023 346 1323.70 0030 3,081.22 2,054.16 3,0]5.77 0.0]I 70R6 (1.1 dfi 34R 1,991.20 DIWfi 4,942.62 3,295.OA 350 4.879.30 0.112 9992.71 6,661.81 1303266 0.299 STJS1 t:kvatinn (PI) Aus. (sir, Area (A(') A'oNme ((:N) Cmmlalive (:mnla4Me Vobmle (Ct) Volmre (AL'41) 332 I G4.711 110114 33d M9].DII 11021 �99,811 9fiJ Od 9fid.i10 U336 1880.20 0043 271]25 3.681.29 0O35 338 3,10310 0071 143306 8,61435 0.199 STJSSb IIIIIIIIIIIIIIIM t:kvatinn (Fl) Area (SF)Al+A2+(A1"A2)V2 .Area (AC) l'oMne (C� f:mmlative Cmmlafive Vohs (CF) Valmre (AC -fl) 344 394.40 0.009 O.CO 0.00 0.00 0.000 346 830-60 0019 1,797.35 1,19826 1_19%26 U(1211 348 1.386.50 0032 3]90.38 2,19359 3391.32 0.078 350 2,072.50 0048 5,154A5 3,436.30 6.828.12 0.157 SSTf Ekvnlion (El) .Area (8Iq .Area A1+A2+(A1"A2)U2 Volume (CT) CumOalive Coovlalive Vo�me (CE) Volmre(A 336 lO,IfiJ 30 1- 0a11 11110 11 (III Il mll 338 12,190 AO 0280 33,490.69 22327.13 22,327.13 0.513 340 14,31400 0329 39,713.99 26,476.00 48,803.12 1.120 342 16 S3].00 0380 46,23(.60 30,R2427 79,62739 1-82R 344 18,55930 1033 53 USfi 32 3.5.370 RR 116.998 27 2 640 SBI romPh.el IIIIIIIIIIIIIIIM I.leraWe (EI) 342 .Area (s� 6.116.40 Area [AC) O.160 Al+p2+(AI=Az)U2 O.GO VONme (C� 0.00 CumlGllve Cumulallve Volume (CF, Valumr (AC-ft) 0.00 0.000 344 ?,53� 80 U I7d 20,473.21 1364E%I 13,648 Ill U 313 346 9,09980 U209 24,9506d 16633 ]6 30,28236 0695 348 ]0,]42.30 U247 29,729.10 19.819.40 50,101.96 1.150 350 12,485.40 0287 34,808.60 23,205.87 73,307.83 1.683 352 14329.10 0329 40,190.02 26,793.35 100.10118 2.295 e RIVANNA VILLAGE: EROSION AND SEDIMENT CONTROL PLAN AMENDMENT 1 AND PHASE II ALBEMARLE COUNTY. VIRGINIA SCE Blossom Consulting and Engineering Inc. 1101 Professional Drive, Suite G Williamsburg VA 23185 p: 757-870-4825 KEY PLAN ISSUE REV # DATE DESCRIPTION Date: 12.04.2017 Checked By: Scott c. aioasom, P.E. BLOCK J (WEST): CROSS SECTIONS Ru-YATScwaoam�ll a .,Fropculoos aRsnnanEvnx.gnana Anayelav_4owas aRanmYRZ Ese aevx.m.alllilllMr,axmasl,,:sellsw"i,eelr.lwn (zs) ES - 16 RIVANNA VILLAGE: EROSION AND SEDIMENT CONTROL PLAN AMENDMENT 1 AND PHASE II ALBEMARLE COUNTY. VIRGINIA SCE Blossom Consulting and Engineering Inc. 1101 Professional Drive, Suite G Williamsburg VA 23185 p: 757-870-4825 KEY PLAN ISSUE REV # DATE DESCRIPTION Date: 12.04.2017 Checked By: Scott c. aioasom, P.E. BLOCK J (WEST): CROSS SECTIONS Ru-YATScwaoam�ll a .,Fropculoos aRsnnanEvnx.gnana Anayelav_4owas aRanmYRZ Ese aevx.m.alllilllMr,axmasl,,:sellsw"i,eelr.lwn (zs) ES - 16 -_ __`_ - -_ v-..-.-��-aid-•.. n=_ non =II Ilklf�ll Illf�ll Drrcxt ^,. J�. m_urEmactmJE HvevN nEDOLx IFATALLPD 9 BLEB ERD D A - i T DETAIL: E & S CONTROL BLANKET INSTALLATION 7 NTS OP A A 3a D UPSTREAM BASIN ROCK SIZE MIN LENGTH G t,2,3 CLASS I RIPEAP 20 FT 14 z,3 CLASS I RIPRAP zD FT J t, 2,3 CLASS I RIPRAP zD FT F—T7 DETAIL: PIPE OUTLET CONDITIONS NTS I. DUST CONTROL SHALL BE IMPLEMENTED IN ACCORDANCE WITH VESCH STANDARD AND SPECIFICATION 3.39. 2. CONTRACTOR SHALL LIMT DISTURBNACE TO THE DEGREE FEASIBLE TO LIMIT DUST EMISSIONS. 3. UTILIZE TEMPORARY STABILIZATION MEASURES AS SPECIFIED IN MINIMUM STANDARD #I. q. TO CONTROL DUST, IRRIGATE/SPRAY WITH WATER TO MOISTEN AND REPEAT AS NEEDED AND/OR AS DIRECTED BY ALBEMARL F COUNTY ES S INSPECTOR 5. ADHESIVES MAY BE REQUIRED BASED ON SITE CONDITIONS AND SHALL BE ADDED AS SPECIFIED IN VESCH 3.39. FO DETAIL: DUST CONTROL NOTES 7 NTS cxoxsLar BM RMo s'ro F Hmo6 s -Q-RED DNswt —FoR P.CRswT (�D1'EMPSH NwL HAVE TPan�sALEULD uEu of EDGE JDx.'I'J I (Junto ex axip soar sxEEeeR R I I Eo, � PLANVIEW �� STAPLING DIAGRAM 'C5ELECKSLOTS ATMIN. 5PP C-C INTERVALS' CAMBIRNEAQ'lT M'B TIANOiTA'6 3_t/4.' Its wAsxER LB^ to" MIN. 3116" Du 1 STEEL PIN J— STAKE PIN t" n16" v GAUGE STEEL 6^xt"x6"STAPLE STAPLE 0 t TRTANGULARSURVEYSTAKE-MINIMUM o, IN LENGTH. PLACEMENT OF THE STAKE ACROSS THE FLAW OF THE WATER IS THOUGHT TO PROWDEA "PINBALL EFFECT" TO HELP SLOW THE VELOCITY. z) D GAUGE STEEL -MINIMUM t" WIDE BY 6" I LENGTHSTEELSTAPLE-z"A"STAPLE MAYBE REQUIRED IN CERTAIN SOIL CONDITIONS. 3) STEEL PINS -3/t6 DIAMETER STEEL PIN BY E8^ IN LENGTH WTTHA ."DIAMETER WASHKRONTOP. (SEE ILLUSTRATION) 3 DETAIL: SOIL MATTING ANCHORS 7 NTS STONE 10' MIN. CONSTRUCTION ACCESS 3" SM-2A ASPHALT TOP CPUR$E EXISTING 2% 2% PAVEMENT $" WIN. 21A AGGREGATE BASE PROFILE STONE 70' MIN. CONSTRUCTION - ASPHALT PAVED ACCESS A OASHRACK l EXISTING. V 27 2% PAVEMENT 12% 12' MIN.* -MUST EXTEND FOIL WIDTH Lo i_POSITIVE DRAINAGE OF INGRESS AND EGRESS TO SEDIMENT OPERATION TRAPPING DEVICE PLAN 12' MIN POSITIVE DRAINAGE 2% TO SEDIMENT TRAPPING DEVICE FILTER CLOTH SECTION A —A A nlinunluu water tap of 1 hich Dust be installed With a 11ltiiiminn 1 inch bnllcock shutoffvalve supphiiig awash hose with a cGameter of 1.5 inches for adequate constant pressitre. Wash water imist be carried away &oni the entrance to an approved settling area to remove sednicirt. All sedfinent shall be prevented from 21Tter1ll3 stolxn drains, ditches or watercourses. PAVED WASH RACK 7 i. CONSTRUCTION ACCESS ROADS ARE SHOWN ON THE ERS MASTERPLAN SHEET ES-4a, AND ARE GENERALLY LOCATED IN THE FUTURE ROAD ALIGNMENT CORRIDOR. 2. AFTER PERIMETER CONTROLS ARE PLACED, ACCESS ROADS SHALL BE INSTALLED CONCURRENT WITH CLEARING AND GRUBBING ACTIVITIES, GENERALLY FOLLOWING EXISTING GRADE. 3. IN STEEP AREAS T.E. SLOPE EXCEEDING TD%), CRS SHALL BE INSTALLED PER VESCH STANDARD AND SPECIFICATION 3,03, 4. ROADBEDS SHALL GENERALLY BE Iq FEET WIDE FOR ONE WAY TRAFFIC AND 20 FEET WIDE FOR 2 WAY TRAFFIC, WITH LESS THAN q% CROSS SLOPE. CUTS AND FILLS SHALL BE LESS THAN 2:I SLOPE. F—ai DETAIL: CONSTRUCTION ACCESS ROAD NOTES 7 1 NTS �` �Fl4 __ Deter Dsswc cowTancmx REBrowxF. NEep�DD>P[,rex't' ,a .:z TIER nuw� assE i _ xDx-„xALwEEIAxDs. '- TYPICAL PROFILE ro I —a ro '�mrRDUTR DaD�.x----------- QI�ET�,Poaaa� RvcDxTSAcroR SECLTONA-A' E q DETAIL : VEHICULAR STREAM CROSSING L7 RRIDc sPAx'.DsaDx. TIMBERMATTING NTS I— NOTTO EXCEEDWIDTHOF �- EXISTING ROAD BEO n2 FO - MAXIMUM FILL _ _ P.XISTING NOTE: GAAVELAOCPSS ROAD STAMLIZATION PROPOSPDONLYWITHINE%ISfINGROADEEDSEHIL 1�1—IIIHIL—II - GRADE Ro_m O PI A- I-DEILaasovERALLs C (MAX DE*PCH--St6DIN. EXISTING OIPTIOg AL DA VWTaS'1 STONE SOIL FABRIC CM .DEPTH=6INJ DT s3STONE [MAX. nEFDi=6INJ 5 DETAIL: CONSTRUCTION ROAD STABILIZATION 17 NTs DV III III—Illlul= IIIIIhVI�=11�—III�I—III=J=� III 111�1=II�IIhIIIIIuI=_=III-111�Ih111�I=11111=11111-111� �11�=11� TYPICAL PARABOLIC DIVERSION IIIIII�III�I-11111uI=—_—.In=1111111=11.1�-111111=11J=111111=11111 I �III��---illlllll-111 =IIII_n=11 111-1ulll �IIJ�111_IIII.I ----I ...... .... TYPICAL TRAPEZOIDAL DIVERSION IIIIhIIIIII IIIJ ,IImu=111J=11.1� 111111=IIJ=111�I III=111��IJ=1mmI — illlul=111��IIJ IIIII—IIIIII=IIIIII=11� III — _ = _ _ _ = II�L IIIIII�IIIIII-11111I-11111I-111111=11111111 TYPICAL VEE—SHAPED DIVERSION RIVANNA VILLAGE: EROSION AND SEDIMENT CONTROL PLAN AMENDMENT 1 AND PHASE II ALBEMARLE COUNTY, VIRGINIA SCE Blossom Consulting and Engineering Inc. 1101 Professorial Drive, Suite G Will la —burg VA 23185 P: 757-870-4825 KEY PLAN ISSUE IREV# I DATE I DESCRIPTION �NyT H Og `ram z SCOTT C. BLOSSOM Lic. No. 40207 ADO�4 F�sS1ONAL ECG~ Dale: 12.04.2017 1 Checked By: Sa C. Blossom, P.E. E & S DETAILS (1) ES - 17 CROSS SECTION aun>E ��urvALERr oOR � vAR1Ae a xaar pII I- I I II �l I III I I I I I I � I� IFI I I I I I I I I II II II I I II-1 I I I I T I I I seaenDER B ELIR mrN. a. LEVEL SPREADER WITH VEGETATED LIP r—=TT.'-o" =E DETAIL: LEVEL SPREADER NTS 12a•aT2#kaYlxllR':/ 2!, DIA.GALV. �ALIIMINIIM PENCE POST CHAIN LINKED FENCE r2''MIN.FIRSTLAYER " MAT W/ FILTER FABRI �F OVERLAPAT BOTTOM GROUND G EMBED FILTER FABRIC g 9 9" MIN INTO GROUND LWFILTERC�WyTH L WIDE RHN(;H MIN SECTION VffiW FENCING: FENCING SHALL BE 42" HIGH CHAIN LINK FENCE CONSTRUCTED IN ACCORDANCE WITH THE LATEST VIRGINIA DEPARTMENT OF TRANSPORTATION CHAIN LINK FENCE DETAIL 502.04. THE SPECIFICATION FOR A 6-0" FENCE SHALL BE USED, SUBSTIT4TTING 42" FABRIC AND 6'-o' LENGTH POSTS. i. CHAIN LINK FENCE TO BE FASTENED SECURELY TO FENCE POSTS WITH WIRE TIES OR STAPLES. 2. FILTER CLOTH TO BE FASTENED SECURELY TO CHAIN LINK FENCE WITH TIES EVERY 24" AT TOP AND MID SECTION. 3. WHEN TWO SECTIONS OF FILTER CLOTH ADJOIN EACH OTHER THEY SHALL BE OVERLAPPED BY 6' AND FOLDED. 4. MAINTENANCE SHALL BE PERFORMED AS NEEDED AND SILT BUILDUPS REMOVED WHEN "BULGES" DEVELOP IN THE SILT FENCE. F4� DETAIL: SUPER SILT FENCE 18 NTS SB CREST OF EMERGENCY DESIGN HIGH WATER SPILLWAY (z5-YR. STORM ELEV.) RISER CREST fi7C.Y./ AC.DEWATERING "DRY'STORAGDEVICE W 67 C.Y./AC.'WET"STORASEDIMENT CL ("V✓EE"STORAGE REDUCED TO 34 C.Y./ ACRE) - DESIGN ELEVATIONS WITH EMERGENCY SPILLWAY DESIGN HIGH R WATER T (25-YSTORM ELEV.) MIN. 2.0' MIN. o.5 MIN.1.o' 67 C.Y./AC .,.T "DRY "STORAGE RISER CREST 67 C.Y./AC. WET "STORAGE DEVICE gg33 gg SEDIMENTCLEANOUT POINT DESIGN ELEVATIONS WITHOUT EMERGENCY SPILLWAY (RISER PASSES 25-YR. EVENT) 1 2 1 DETAIL: SEDIMENT BASIN SCHEMATIC 1B ELEVATIONS NTS PROVIDE ADEQUATH STRAPPING SB / POLYETHYLENE CAP r✓/ — DEPTH TACK WELD —— — -- " VARIES AS REQUIRED PERFORATED POLYETHYLENE FOR " _ — DRAINAGE TUBING, DIAMETER STORAGE S STORAG VARIES (SEE CALCULATIONS IN �\ APPENDIX3.14-A) WET "FERNCO-STYLE"COUPLING STORAGE DEWATERINGORIFICE, SCHEDULE 40 STEEL STUB 1-FOOT MINIMUM, DIAMETER VARIES (SEE CALCULATIONS ON CORRUGATED METAL RISER PLAN SHEETS) NOTE: WITH CONCRETE RISER, USE PVC SCHEDULE 40 STUB FOR DEWATERING ORIFICE DRAINAGE TUBING SHALL COMPLY WITH ASTM F667 AND AASHTO M294 5 DETAIL: SEDIMENT BASIN DEWATERING SYSTEM 18 NTS CONSTRUCTIONOFA SILTPENCE JP (WITHOUT —PORT) L SEf THE STARES. 2. EXCAVATEA4" x4" TRENCH u S— ALONGTHE—OF STARES. 6' MAX. /A FLOW a" S.9TAeLE FILTER MATERIAL 4. EACBi+II.LAxDCO[vBACT W, STAKES AND ERTEND THE EXGVATED SOIL —THEE—H. FLOW SHEET FLOW IN9TAI.LATION (PERSPECTIVE VD.M') FLOW 3'MwY. JJI POINTSASHOULDE HI TTHAS OROB. D(now—) GLYST (FRONT ELEVATION) DETAIL: SILT FENCE 8 NTS ST ORIGINAL f ,, 1 GROUND ELEv. 67 CU. YD./ACRE 4 67 CU. YD./ACRE (EXCAVATED) 4 FH.TER CLOTH ORIGINAL GROUND ELEV. COARSEAGGRECATE » CLASSIRIPRAP CROSS SECTION OF OUTLET CTASS iRiPR AP LENGTH (IN FEET)= 6XDRAINAGEAREA �c / CINACJ /f DIVERSION DIKP. cowRs� wccxEcwTE \ // EXCAVATED //FH.TER CLOTH //�\ 1AREA 6 DETAIL: SEDIMENT TRAP 18 Yx�� ✓l. i 1 ]l I =5 II II II II II-g J II 1 f f: f � { rD � dll TSC#3 = TWO (2) 48 INCH DIAMETER CULVERTS OR EQUIVALENT- TSC#4 = FOUR (4) 48 INCH DIAMETER CULVERTS OR EQUIVALENT* �7� DETAIL: TEMPORARY STREAM CROSSING 18 1 NTS TOE -ASeUIREMENTS FOR BANX STABILIZATION FILTER $INDERLINER (PREFERRED) sra aax -r T I JLAR FILTER Sauce: Adapted from •e M��en+I Plate 3.19-1 NOTES: CLASS 1 RIP RAP SLOPE STABILZATION TO BE APPLIED ON BIOFILTER SLOPES DOWNSTREAM OF BRIDGE/CULVERT CROSSINGS AS SHOWN IN PLAN VIEW. MINIMUM DEPTH - 2.2 FF MINIMUM HEIGHT - 3 FF UNLESS OTHERWISE SPECIFIED HEREIN UNDERLAIN BY FILTER FABRIC PER VESCH STANDARDS AND SPECIFICATIONS. g DETAIL: RIP RAP SLOPE STABIL17.ATION 18 1 NTS RIVANNA VILLAGE: EROSION AND SEDIMENT CONTROL PLAN AMENDMENT 1 AND PHASE II ALBEMARLE COUNTY, VIRGINIA SCE Blossom Consulting and Engineering Inc. 1101 Professional Drive, Suite G Williamsburg VA 23185 p: 757-870-4825 KEY PLAN ISSUE IREV# I DATE I DESCRIPTION o{��PyTH Op o� 5COTT C. BLOSSOM Lie. No. 40287 �o �wC �SsIONAL V1 Dale: 12.04.2017 1 Checked By: S—C. 131—m, P.E. E & S DETAILS (2) ES - 18 NOTES: 1) CONCRETE SHALL BE CLASS A3 z) CONTRACTOR MAY SUBMIT SwY-GR ALTERNATE BID WITH PLOWABLE FILL INSTEAD OF CONCRETE, t(thickness)=3.0" RIVANNA VILLAGE: ANTI- VORTEX TIC DESIGN PENDING" PROVALBYDESICN EROSION AND SEDIMENT STMOARO PIPE HIWCER OR EtiA''t. pNETEN 9 iS a xupISE$�g� . ., SIDE WALLS CONTROL PLAN ,.. .�y� r � ' Mow, R1111T v Y DID. EXCAVATED TRENCH TOP OF Sr TUBE ELEVATwn SHALL NOT BE S THAN 6" .- -- AMENDMENT 1 AND PHASE II /,� A ��'TOP :,ql�r--' _� STIFFENER°`.oDiameter 0 TO ND OLot ',3-'1 PENDICULM TOY.IRS. a ALBEMARLE COUNTY, VIRGINIA ---- '.,. ��" WATER V ? TOP IS -GAGE D METAL OR 1/B' " TE. "` PRESSURE REUEl. ; Y - S rcRNAmi WATER BE OMMITTED, IF' . PE _TLET PI ,.. .� I I I° GAALITY oRFIOE - OPENNG *5'. CORRUGATIONS EN OPEN WHEN E- 0 E WHE -. � ��, mot_. �� I PLAN " ATTACHED. _ Y2 D z,.�l '�+ I Ya D OR 6" .`_CYLINDER IS-#'.`�`MUGATED KZ�SIDE VIEW e: " - - '^A, i FRONT VEW oRA,lbiafaf ST aY40i s METAL PIPE OR .T FROM 12" 12" (TYPICAL DETAIL (TYPICAL DETALS) cri swu-+TTPILALI `�" 4� .� _ STEEL PLATE. 8„ 13CE NCrM ^" "` k" ', ' NOTES: "+" `'_ I. r E YWArER YANACENENI zr ' M TO BE USED FOR oRT ` Cc '`-- -- I. TNE CYUNDE S" -_ FIRMLY FAST �q E 12INCH Blossom Consulting and Engineering Inc. Pmtessional Dnve Suite G 2. GR Pk' " . - I' T W A 9 Via+„ TOP OF THE ,+s Diameter DRAINAGE W11 W II amsburg VA 23185 p 757-870-4825 3. RL 4�.-qq �pyy��R77 t ENT HATER QUALITY BASH IS BEND USED o y Z r.c;R„�0 '.'BAR SIZE /6 uN,) WvIIAl7y s. j OWN g °5.'� y `k '++w,,,,� '°" 2. SUPPORT BAA '�DED BLANKET (VDOT #98) A. of [ 4. - TES tr MY), As SHOWN "�' .� � TN WATER QUALITY 0; SEBW 11 CONTROL. Tn # 'F ty, J° TO THE TOP ER ��`-°" OR ATTACNEES S BOLTED TO T_ R. S INCH DIAMETER B. su (#is u g E" ORANAGE s _ .,t SLOTTED PVC PIPES PIPES O 12" (MIN. 5 FEET LONG) 6. COSiF - ..yy� PLATES Or ANY! SMALL 'tf DAYLIGFITED BE R., uNAGE STRJOURE. ). rNC G. SOLD FOR THE LENGIN SECTION - {{ �I: �BB,, ��T&'Rd THROUGH WEEPHOLEIN `-- E rl[ wt:r sToaACE &u :.rx. BEE . ;a;A ,,, i .. " HEADWALL ��ry-�� saccseATnN NOTES: �3� DETAIL: OUTFALL CULVERT CONCRETE CRADLE g,{ rye^ T ,Y Rob Avo 9ev DGE 61arvoMMs _ A:r MM � •'�` I !} � S W M) C E I A L. S REFERENCE 1) PROPOSED TEMPORARY SEDIMENT BASIN RISER STRUCTURE SHALL CONSIST OF 36-INCH INSIDE DIAMETER CORRUGATED METAL PIPE. PER TABLE 3-M-D OF THE VESCH HANDBOOK, THE CONCENTRIC TRASH RACK SHALL CONSIST OF A 54-INCH DIAMETER CYLINDER, ut GAGE, 17-INCHES IN HEIGHT. MINIMUM 1q AND GRAVEL DRAINAGE BLANKET NTS sxEET I OF 5 BEY- DATE >t12 SUPPORT BAR SIZE IS #8 REBAR. ryA,p,TONNA &RAIENZ9151Y Wll.. T- 2) CORRUGATION FOR I2"-36"PIPE MEASURES 2y"x}" DETAIL: MODIFICATIONS TO PERMANENT SWM RISER TO SERVE AS TEMPORARY SEDIMENT BASIN PRINCIPAL SPILLWAY DETAIL: SEDIMENT BASIN ANTI -VORTEX DEVICE FOR CMP RISER (TEMPORARY STAGE 1 SIB 11) 19 19 (FROM VESCH 3.14 -SEDIMENT BASIN) FLOTATION CALCULATIONS FOR RISER BASE (SET) GIVEN: Tyg {- �rT �Y UkY�* WE�cHTOFWATER = 64.2o LBS/CU-FT EA�B#�YTT $T�1• KEY PLAN 54„ PRINCIPAL SPILLWAY WEITOPGHT OF {V "" " THE RISER OF THE PRINCIPAL SPILLWAY SHALL BE SECURELYATTACHED TO THE BARREL BYAWATERTIGHT INVERT OF RI ERE =3g6.o IT, NAVD88 INVERT OF UNDERDRAIN =342.0 FT, NAVD88 �s.'Tyx'R�yy�N P-, " '3%art"$h& CONNECTION. THE BARREL AND RISER SHALL BE PLACED ON A FIRMLY COMPACTED SOIL FOUNDATION. INVERT OF CULVERT = 336.0 FT, NAVD88 THEBASEOFTHE RISER SHALL BE FIRMLYANCHORED AS SHOWN TO PREVENT FLOATING. SPECIAL CARE BOTTOM INVERT OF RISER = 336.0 FT, NAVD88 SHALL BE TAKEN IN COMPACTING AROUND THE PIPE IN 4-INCH LAYERS AND COMPACTED UNTIL 95% HEIGHT OF RISER = o.o FT 13.0 I RUNEr 1 COMPACTION IS ACHIEVED. A MINIMUM OF TWO FEET OF FILL SHALL BE HAND -COMPACTED OVER THE BARREL BEFORE CROSSING IT WITH CONSTRUCTION EQUIPMENT. RISER INSIDEDIAMETER FT WALL THICKNESS 4INCHES RISER INSIDE AREA _ FILTER OR DRAINAGE DIAPHRAGM IIISEROUTER AREA 10.56E RISER FOOTPRINT = xx SF 1) THE DIAPHRAGM SHOULD CONSIST OF SAND, MEETING FINE CONCRETE AGGREGATE REQUIREMENTS RISERBASE: Ate, Y,m- om (AT LEAST y5% PASSING THE NO. 40 SIEVE BUT NO MORE THAN 1o% PASSING THE NO. 100 SIEVE). IF RISER BASE AREA = 25.22 SF ome e.me m UNUSUAL SOIL CONDITIONS EXIST, A SPECIAL ANALYSIS SHOULD BE COMPLETED. BASE DEPTH = 5.0 FT z) THE DIAPHRAGM SHOULD BE A MINIMUM OF 3 FEET THICKNESS AND SHOULD EXTEND VERTICALLY RISEROPENINGS: UPWARD AND HORIZONTALLYAT LEAST 3 TIMES THE PIPE DIAMETER AND VERTICALLY DOWNWARD UNDERDRAIN ORIFICE (6" DIAMETER) o.2o SF " ORRUGATED METAL AT LEAST 24INCHES BENEATH THE BARREL INVERT, OR TO ROCK, WHICHEVER IS ENCOUNTERED OUTRALL CULVERT (zq" INSIDE DIAMETER) 3 M SF ISSUE FIRST ISTECH. NOTE 709) TOTALAREA 334 SF E g CYLINDER WITH 3) THE DIAPHRAGM SHOULD BE PLACED IMMEDIATELY DOWNSTREAM OF THE CUTOFF TRENCH, TOTALVOLUME(AREAX4") 1 1CU-FT 9 ,..; -. ANTI-VORTEX BARS PER WEIGHT OF DISPLACED WATER: DETAIL 2,THIS SHEET) APPROXIMATELY PARALLEL TO THE CENTERLINE OF THE DAM. 4) IN ORDER TO ACHIEVE MAXIMUM DENSITY OF CLEAN SANDS, FILTER LAYERS SHOULD BE FLOODED VOLUME OF RISER = 105.fi CU-FT = - REV# DATE DESCRIPTION WITH CLEAN WATERAND VIBRATED JUST AFTER THE WATER DROPS BELOW THE SAND SURFACE. THE VOLUME OF BASE =78.02 CU-FI TOTAL DISPLACED VOLUME = t83.62 CU-FT FILTER MATERIAL SHOULD BE PLACED IN LIFTS NO MORE THAN 12 INCHES. 5) UP TO FOUR FEET OF EMBANKMENT MATERIAL MAYBE PLACED OVERA FILTER MATERIAL LAYER WEIGHT OF DISPLACED WATER = 411 LBS WEIGHT OF RISER k. ww - #1 3/2/18 PER COUNTY COMMENTS BEFORE EXCAVATING BACK DOWN TO EXPOSE THE PREVIOUS LAYER AFTER REMOVING ANY VOLUME OF RISER CONCRETE 34A1 CU FT #2 q 16 18 PER COUNTY COMMENTS UNSUITABLE MATERIALS, THE TRENCH MAY BE FILLED WITH ADDITIONAL 12-INCH LIFTS OF FILTER MATERIAL, FLOODED AND VIBRATED AS DESCRIBED ABOVE, UNTIL THE OP OF ADJACENT FILL IS VOLUME OF OPENINGS Lu CU PT TOTAL VOLUME OF RISER 33 80 CU FT 5`dYxN{ \ REACHED. WEIGHT OF RISER 5,07o LBS 36" INSIDE DIAMETER OORUGATED 6) THE DIAPHRAGM SHOULD BE DISCHARGED AT THE DOWNSTREAM TOE OF THE EMBANKMENT. THE OPENINGSIZESFOR SLATTED AND PERFORATED PIPES IN DRAINS MUST BE DESIGNED USING THE WEIGHT OF BASE: VOLUME OF BASE =78.02 CU-FT i� _... ... METAL RISER FILTER CRITERIA A SECOND FILTER LAYER MAY BE REQUIRED AROUND THE DRAIN PIPE IN ORDER TO WEIGHT OF BASE - 4703 LBS bs t,.i 3 1z ALLEVIATE THE NEED FOR MANY VERY SMALL OPENINGS. FABRIC SHOULD NOT BE USED AROUND THE TOTAL DOWNWARD WEIGHT=16,773 LBS PERFORATED PIPE AS IT MAY CLOG RENDERING THE PERFORATIONS IMPENETRABLE BYWATER. FACTOR OF SAFETY A3Y.- �4�2vtY = r(S 18" CORRUGATED METAL BARREL (SEE DESIGN SHEETS FORACTUAL FLOTATION CALCULATIONS FOR RISER BASE (SB2) s `T+ TE LENGTH AND INVERT ELEVATIONS) 9 GIVEN. A WEIGHT OF WATER = 64.2o LBS/CU-FT �-^ ' WEIGHT OF CONCRETE =150.00 LBS/CU-FT - TOP INVERT OF RISER = 346.o FT, NAVD88 INVERT OF UNDERDRAIN = 344.0 FT, NAVD88 NOTE: INSTALL BAFFLE IN SBI2 AS SHOWN IN PLAN VIEW. SEE SEE VESCH STANDARD AND SPEC FOR ADDITIONAL INFORMATION. Op INVERT OF CULVERT =340.0 FI, NAVD88 3.14 P CLASS A- BOTTOM INVERT OF RISER = 340.0 FT, NAVD88 ��$NLTH O C CONCRETE BASE HEIGHT OF RISER = 6.o FT RISER INSIDE DIAMETER = 2.5 FT � 2. WALLTHICKNESS=41NCHES SCOTT C. BLOSSOM > RISER INSIDE AREA = 4-W SF Lic. No. 40207 III SEROUT= SF RISER FOOTPRINTTPRINT XXXX SP d� �ti• = RISER BASE ^ p .E, 6'� - RISER BASE AREA -13.6q SF ! 5 , DETAIL: TYPICAL SEDIMENT BASIN BAFFLE `S70NAL - a BASE DEPTH = 3-Fr 1q ADOPTED FROM VESCH 3.14 NTS ` T $ FILTER OR DRAINAGE DIAPHRAGM RISER OPENINGS UNDERDRAIN ORIPICE (q" DIAMETER) = o.og SF .. PER SPECIFICATIONS ABOVE. OUTFALL CULVERT D13" INNER DIAMETER) = 1.77 SF .. ALTERNATIVE DESIGN INCLUDES TGTALAREA - 1.85 SF - CONCRETE CRADLE AND DRAINAGE TOTAL VOLUME (AREA X 4") = o.6z CU-FT Job No: 1005 Drawn By: BCE - - i BLANKET, SEE DETAIL 3, THIS SHEET) WEIGHT OF DISPLACED WATER Date: 12.04.2017 Checked By: Scon C. Blossom, P.E. VOLUME OF RISER = 47.25 CU-FT 72" CONCRETE BASE (2AD) VOLUME OF BASE = 2939 CU-FT TOTALDISPLACED VOLUME = 76.64 CU-FT E & S DETAILS (3) WEIGHT OF DISPLACED WATER = 4,782.34 LBS -SEE STORMWATER MANAGEMENT PLAN WEIGHT OF RISER SHEETS FOR PERMANENT STORMWATER LIMP VOLUME OF RISER CONCRETE =17.8o CU-FT STRUCTURES DETAILS AND DESIGNS. VOLUME OF OPENINGS = o.62CU-FT TOTAL VOLUME OF RISER =17.a8 CU-FT WEIGHT OF RISER = 2,577 LBS DETAIL: TEMPORARY SEDIMENT BASIN RISER (36" DIAMETER CMP) WITH ANTI -VORTEX DEVICE WEIGHT OF BASE: 1 g NTS VOLUME OF BASE = 2q.39 CU-FT WEIGHT OF BASE = 4,g08.50 LBS TOTAL DOWNWARD WEIGHT =6,985.5o LBS FACTOR OF SAFETY 1.5ES 19 m � .awopcuuas RHsn�xsw�oe.renana Anaye'�ax_aowos arvan�PHz ssc aevz.m.gll�iilMraz. zoaea�aasellsro"i +s esaDmas lal ALBEMARLE COUNTY FINAL PLAN GENERAL CONSTRUCTION NOTES PV IP RIVANNA VILLAGE: 1. PRIOR TO ANY CONSTRUCNON WITHIN ANY EXISTING PUBLIC RIGHT-OF-WAY, INCLUDING CONNECTION TO ANY EXISTING ROAD, A PERMIT SHALL BE OBTAINED FROM THE VIRGINIA DEPARTMENT OF TRANSPORTATION (VDOT). THIS PLAN AS DRAWN MAY NOT ;�� O \ �� EROSION AND SEDIMENT ACCURATELY REFLECT THE REQUIREMENTS OF THE PERMIT. WHERE ANY DISCREPANCIES OCCUR THE REQUIREMENTS OF THE PERMIT PLAN VIEW ,•• ••� SHALL GOVERN.approved � CONTROL PLAN dewatering device - 2. ALL MATERIAI S AND CONSTRUCTION METHODS SHALL CONFORM TO CURRENT SPECIFICATIONS AND STANDARDS OF DOT UNLESS stream INN ..■ � OTHERWISE NOTED. rdiversion pump AMENDMENT I AND PHASE II 3. EROSION AND SILTATION CONTROL MEASURES SHALL BE PROVIDED IN ACCORDANCE WITH THE APPROVED EROSION CONTROL PLAN discharge hoses. I -IA AND SLL.BEINSTALLED PRIOR TO ANY CLEARING, GRADING OR OTHER CONSTRUCTION. P �hosee /�' ALBEMARLE COUNTY, VIRGINIA p dewatering pump 4. ALL SLOPES AND DISTURBED AREAS ARE TO BE FERTILIZED, SEEDED AND MULCHED. 5. THE MAXIMUM ALLOWABLE SLOPE IS 2a (HORIZONTAL:VERTICAL). WHERE REASONABLY OBTAINABLE, LESSER SLOPES OF 3:1 OR Es BETTER ARE TO BE ACHIEVED. flow Lint k h e % flew A �^^sq�W" R 6. PAVED, RIP RAP OR STABILIZATION MAT LINED DITCH MAY BE REQUIRED WHEN IN THE OPINION OF THE COUNTY ENGINEER, OR clean water dike 1 sump -hole setliment dike DESIGNEE, IT IS DEEMED NECESSARY IN ORDER TO STABILIZE A DRAINAGE pool CHANNEL. (12" to 18" deep ork area 2' dia.) - _- 7. ALL TRAFFIC CONTROL SIGNS SHALL CONFORM WITH THE VIRGINIA MANUAL FOR UNIFORM TRAFFIC pumps should discharge length not to exceed PERSPECTIVE VIEW R which can be onto a stable velocity chat CONTROL DEVICES. d'ss pator made of rip rap -that In one day sm NEN. andball ` cu Seerdball ProteC[ion S. UNLESS OTHERWISE NOTED ALL CONCRETE PIPE SHALL BE REINFORCED CONCRETE PIPE -CLASS III. ( - °O"1O1EfE ° r Ae wu+ detail this sheet) SECTION A -A q. ALL EXCAVATION FOR UNDERGROUND PIPE INSTALLATION MUST COMPLY WITH OSHA STANDARDS FOR THE CONSTRUCTION _ INDUSTRY (29 CFR PART 1926). impervious sheeting ♦ `=t , DICE GENERAL CONSTRUCTION NOTES FOR EROSION AND SEDIMENT CONTROL PLANS base flow + 1 foot o work area (2 foot minimum) o srvcs oB oaMncsroaouncsrrrsmucnass ANU UNPROTscTEo T. THE PLAN APPROVING AUTHORITY MUST BE NOTIFIED ONE WEEK PRIOR TO THE PRE -CONSTRUCTION / AaEAs Blossom Consulting and Engineering Inc. CONFERENCE, ONE WEEK PRIOR TO THE COMMENCEMENT OF LAND DISTURBING ACTIVITY, AND ONE WEEK PRIOR TO THE FINAL .. cSAVFL SHALL BFvoOT>a sas�Ds scoARSF AccBFCA,E seaon of sandbag dike DUI 'J 1101 Profess onal Dnve, Suite G INSPECTION. a EogeEVEneemmz000 Williamsburg VA 23185 p: 757-870-4825 2. ALL EROSION AND SEDIMENT CONTROL MEASURES WILL BE CONSTRUCTED AND MAINTAINED ACCORDING TO MINIMUM STANDARDS NOTES: IN--'^F^6 DETAIL: CURB INLET SEDIMENT FILTER AND SPECIFICATIONS OF THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK AND VIRGINIA REGULATIONS VR 625-02-00 NTS EROSION AND SEDIMENT CONTROL 1. SET UP PUMP AND HOSE AS SHOWN, OR USE OTHER PRACTICAL Mqy, �ro REGULATIONS. ALTERNATIVES. PUMP SHOULD HAVE TWICE Th'E PUMPING CAPACITY OF ANTICIPATED FLOW. 2. ALL INTAKE HOSES WILL BE SCREENED. PERSPECTIVE VIEW PERSPECTIVE VIEW 3. ALL EROSION AND SEDIMENT CONTROL MEASURES ARE TO BE PLACED PRIOR TO OR AS THE FIRST STEP IN CLEARING. 3. DISMANTLE DOWNSTREAM DAM, THEN UPSTREAM DAM. KEEP PUMP PLASTIC FENCE METAL FENCE RUNNING TO MAINTAIN STREAM FLOW. 4. A COPY OF THE APPROVED EROSION AND SEDIMENT CONTROL PLAN SHALL BE MAINTAINED ON THE SITE AT ALL TIMES. 5. PRIOR TO COMMENCING LAND DISTURBING ACTIVITIES IN AREAS OTHER THAN INDICATED ON THESE PLANS (INCLUDING, BUT NOT DETAIL: PUMP AROUND DIVERSION C-) DETAIL: SAFETY FENCE 1p LIMITED TO, OFF -SITE BORROW OR WASTE AREAS), THE CONTRACTOR SHALL SUBMIT A SUPPLEMENTARY EROSION CONTROL PLAN TO / NTS NTS THE OWNER FOR REVIEW AND APPROVAL BY THE PLAN APPROVING AUTHORITY. 6. THE CONTRACTOR IS RESPONSIBLE FOR INSTALLATION OF ANY ADDITIONAL EROSION CONTROL MEASURES NECESSARY TO PREVENT ww c°rvcs e�ncv EROSION AND SEDIMENTATION AS DETERMINED BYTHE PLAN APPROVING AUTHORITY. 7. ALL DISTURBED AREAS ARE TO DRAIN TO APPROVED SEDIMENT CONTROL MEASURES AT ALL TIMES DURING LAND DISTURBING BMP I1 DIVERSION NOTES r ACTIVITIES AND DURING SITE DEVELOPMENT UNTIL FINAL STABILIZATION IS ACHIEVED. 8. DURING DEWATERING OPERATIONS, WATER WILL BE PUMPED INTO AN APPROVED FILTERING DEVICE. L. INORDERTOCONSTRUCTTHE PROPOSED EMBANKMENTASSOCATED WITH THELEVELUIVETPONDUVRIL BE DIVERSION CHANNEL (BMP 11) �`- NMMSARYTODIVERTAND/ORPUMPSTREAMFIAWAROUNDTHEWORKAREADURINGSEME PEMODSOF 9. THE CONTRACTOR SHALL INSPECT ALL EROSION CONTROL MEASURES PERIODICALLY AND AFTER EACH RUNOFF PRODUCING CONSTRUCTION. 344�- RAINFALL EVENT. ANY NECESSARY REPAIRS OR CLEANUP TO MAINTAIN THE EFFECTIVENESS OF THE EROSION CONTROL DEVICES 2. THESTREAMCHANNELCONTRIBOTINGTOTHEPOINTOFDry IONISAPPROMM nLY4FEETWIDEANDI-2 SHALL BE MADE IMMEDIATELY FEET DEEP, WITH SEASONAL INTERMITTENT FIAW. C N L 3. BASED ON POST DEVELOPMENT HYDROLOGICANALYSIS, THE LO YEAR xq HOUR PEAK DISCHARGE IS 343 TO. ALL FILL MATERIAL. TO BE TAKEN FROM AN APPROVED, DESIGNATED BORROW AREA. APPROXIMATELY Soo CFI, VMCH WOULD NECESSITATEA LINED DIVERSION CHIANNEL(EG3 MATTING) 20 FEET �� WIDE,2FT DEPTH WITH ANASSOCATED PEAK VELOCITY OABFT/SEC. HKEY PLAN 11. ALL WASTE MATERIALS SHALL BE TAKEN TO AN APPROVED WASTE AREA. EARTH FILL SHALL BE INERT MATERIALS ONLY, FREE OFq GIVF.NTITE"RECEIVING"CHANNELATTHEOUTFALL,ANDTHEREQUIREDOUTFALLPROTECTfOxASSOCATED 342 ROOTS,STUMPS, WOOD, RUBBISH, AND OTHER DEBRIS. WITHTHEDIVERSIONCHANNEL,ACHANNELDESIGNEDTOCONVEYTHELYEARSTORMEVENT(DoCFS)ISPROPOSED, LI THUS ALLOWING FORLARGER EVENTS TO ACCESS THE FLOODPLAW.12. BORROW OR WASTE AREAS ARE TO BE RECLAIMED WITHIN 7 DAYS OF COMPLETION PER ZONING 341 ORDINANCE SECTION 5.1.2S.5 PROPOSED DIVERSION CHANNEL DIMENSIONS sEoi 5,1. 1x FT BOTTOM WIDTH T3. ALL INERT MATERIALS SHALL BE TRANSPORTED IN COMPLIANCE WITH SECTION T3-301 OF THE CODE OF ALBEMARLE. x. FT DEPTH 3400 53. 23 SIDE SLOPES 5 10 15 20 W1H GP1 T4. BORROW, FILL OR WASTE ACTIVITY INVOLVING INDUSTRIAI`TYPE POWER EQUIPMENT SHALL BE LIMITED TO THE HOURS OF TooAM S.q. LINED WITH EC -3 MATTING DISTANCE (FT.) _ - T09:00PM. 5.5. 1.5%SLOPE sEoiNE . _. DIVERSION CHANNEL CROSS-SECTION sPEcinc APPucnnoN T5. BORROW, FILL OR WASTE ACTIVITY SHALL BE CONDUCTED IN A SAFE MANNER THAN MAINTAINS LATERAL SUPPORT, OR ORDER TO 6. THEPROPOSED DI MIONCHANNEL SHALL DUTFALLINT'OOUTFALLPROTELTIONTATEITHERTHE VERTICAL SCALE: 1" = 2' HORIZONTAL SCALE: 1" = 5' MINIMIZE ANY HAZARD TO PERSONS, PHYSICAL DAMAGE TO ADJACENT LAND AND IMPROVEMENTS, AND DAMAGE TO ANY PUBLIC EMERGENCY SPILLWAY IACATION(300 FT LENGTH) ORTHE PRINCIPLE SPILLWAY OvrnALL Eoo PT LENGTH) THIS METHOO OF INLET PROTECTION IS APPLICABLE WHERE STREET BECAUSE OF SLIDES, SINKING, OR COLLAPSE. HEAVY FLOWS ARE EXPECTED AND WHERE AN OVERFLOW NECESSARY PREVENT EXCESSIVE PONDING 16. THE DEVELOPER SHALL RESERVE THE RIGHT TO INSTALL, MAINTAIN, REMOVE OR CONVERT TO PERMANENT STORMWATER 6.6. =FALL PROTECTION DESIGN ABOUNO THE STRUCTURE ISSUE MANAGEMENT FACILITIES WHERE APPLICABLE ALL EROSION CONTROL MEASURES REQUIRED BY THIS PLAN REGARDLESS OF THE SALE 6.r.L. APRON LENGTH = IS FEET (MIN) OF ANY LOT,UNIT, BUILDING OR OTHER PORTION OF THE PROPERTY. 6.. CLASS21UPRAP GRAVEL SHALL BE vnoT xs :rasT OR xs COARSE AGGREGATE 6.1.3 APRONWID111 iSFEET REV# DATE DESCRIPTION 17. TEMPORARY STABILIZATION SHALL BE TEMPORARY SEEDING AND MULCHING. SEEDING IS TO BE AT 75 LBS/ACRE, AND IN THEUMPUTID(SEEET)UEU DETAIL: DROP INLET SEDIMENT FILTER DETAIL TO HE DIVERSIOAND �. APERSION MONTHS OF SEPTEMBER TO FEBRUARY TO CONSIST A 5050 MIX OF ANNUAL DIVERSTIOCHANNE NO MUST DISCHARGE INTOAx APPROVED Sax BAGAND INTO THE PROPOSED OUTTALL NTS CHANNEL, APPROVED SILT UST AN T BAG AND INTO #1 3/2/18 PER COUNTY COMMENTS RYEGRASS AND CEREAL WINTER RYE, OR IN MARCH AND APRIL TO CONSIST OF ANNUAL RYE, OR MAY AS PROTECTION APRONASNOTED IN e6. #2 4/T6/T8 PER COUNTY COMMENTS THROUGH AUGUST TO CONSIST OF GERMAN MILLET. STRAW MULCH IS TO BE APPLIED AT SoLBS/TooSF. ALTERNATIVES ARE SUBJECT TO APPROVED BYTHE COUNTY EROSION CONTROL INSPECTOR. 18. PERMANENT STABILIZATION SHALL BE LIME AND FERTILIZER, PERMANENT SEEDING, AND MULCH. ALBEMARLE COUNTY FINAL PLAN GENERAL NOTES GENERAL CONSTRUCTION NOTES GEOTECHNICAL ENGINEERING NOTES TEMPORARY SEEDING NOTES AGRICULTURAL GRADE LIMESTONE SHALL BE APPLIED AT goLBS/1000SF, INCORPORATED INTO THE TOP 4-6 INCHES OF SOIL. FERTILIZER SHALL BE APPLIED AT 1000LBS/ACRE AND CONSIST OF A 10-20-To NUTRIENT MIX. PERMANENT SEEDING SHALL BE APPLIED GENERAL CONSTRUCTION NOTES FOR STREETS (THIS LIST IS IN ADDITION TO THE GENERAL CONSTRUCTION I. SEE REPORT OF GEOTECHNICAL INVESTIGATION AT LSoLBS/ACRE AND CONSIST OF 95% KENTUCKY 31 OR TALL FESCUE AND 01 PERENNIAL RYEGRASS OR KENTUCKY BLUEGRASS. NOTES) r. TEMPORARY SEEDING SHALL CONFORM wmI THE VIRGITNA EROSION AND PREPAxpn BY VIOLA exclxeERINGDATED a/ro/xoL6 STRAW MULCH IS TO BE APPLIED AT 8oLBS/1ooSF. ALTERNATIVES ARE SUBJECT TO APPROVED BY THE COUNTY EROSION CONTROL 1. CONSTRUCTION INSPECTION OF ALL PROPOSED ROADS WITHIN THE DEVELOPMENT WILL BE MADE BY THE FOR AREDB VlOLAL AENGINEECALRECOMMENDATIONS. SEDIMENT CONTROL HANDBOOK STANDARD AND SPECIFICATIONS 3.31 INSPECTOR. COUNTY. THE CONTRACTOR MUST NOTIFY THE DEPARTMENT OF COMMUNITY DEVELOPMENT(296- z. ALL SEED MIXES ARE TO BE UNTREATED TESTED SEED OF GOOD QUALITY 5832) 48 HOURS IN ADVANCE OF THE START OF CONSTRUCTION. S. PHASE z REPORT OF GEOTECHNICAL INVESTIGATION AND FREE OF NOXIOUS WEEDS. 19. MAINTENANCE: ALL MEASURES ARE TO BE INSPECTED WEEKLY AND AFTER EACH RAINFALL. ANY DAMAGE OR CLOGGING TO S. UPON COMPLETION OF FINE GRADING AND PREPARATION OF THE ROADBED SUBGRADE, THE CONTRACTOR PROVIDED UNDER SEPARATE COVER STRUCTURAL MEASURES IS TO BE REPAIRED IMMEDIATELY. SILT TRAPS ARE TO BE CLEANED WHEN 50% OF THE WET STORAGE VOLUME SHALL HAVE CBR TESTS PERFORMED ON THE SUBGRADE SOIL. THREE (3) COPIES OF THE TEST RESULTS 3. PHASE, AND PHASE, REPORT OF GEOTECHNICAL S. ALL SEED SHALL BE DRY AND NOT MOLDY AND SHALL SHOW NO SIGN OF IS FILLED WITH SEDIMENT. ALL SEEDED ARRAS ARE TO BE RESEEDED WHEN NECESSARY TO ACHIEVE A GOOD STAND OF GRASS. SILT SHALL BE SUBMITTED TO THE COUNTY. IF A SUBGRADE SOIL CBR OF 10 OR GREATER IS NOT OBTAINABLE, INVESTIGATIONS ARE INCORPORATED BY REFERENCE IL IXING BEEN WET OR OTHERWISE DAMAGED. FENCE AND DIVERSION DIKES WHICH ARE COLLECTING SEDIMENT TO HALF THEIR HEIGHT MUST BE CLEANED AND REPAIRED A REVISED PAVEMENT DESIGN SHALL BE MADE BY THE DESIGN ENGINEER AND SUBMITTED WITH THE TEST xExEIN. 4. EACH BAG OF SEED SHALL BE LABELED WITH THE NAME OF THE SEED MIX, IMMEDIATELY. RESULTS FOR APPROVAL. PERCENTAGES OF EACH SPECIES INME MIX, AND THE SUPPLIER'S NAME, 3. SURFACE DRAINAGE AND PIPE DISCHARGE MUST BE RETAINED WITHIN THE PUBLIC RIGHT-OF-WAY OR ADDRESS, AND PHONE NUMBER. 20. ALL TEMPORARY EROSION AND SEDIMENT CONTROL MEASURES ARE TO BE REMOVED WITHIN 3o DAYS OF FINAL SITE WITHIN EASEMENTS PRIOR TO ACCEPTANCE BY THE COUNTY. ALL DRAINAGE OUTFALL EASEMENTS ARE TO 5. THE CONTRACT'OR SHALL USE THE SEED MIXES AND APPLICATION RATES AS 0H Op P STABILIZATION, WHEN MEASURES ARE NO LONGER NEEDED, SUBJECT TO APPROVAL BY THE COUNTY EROSION CONTROL INSPECTOR. BE EXTENDED TO A BOUNDARY LINE OR NATURAL WATERCOURSE. SHOWN ON THE PLANT SCHEDULE BELOW. NO SUBSTITUTIONS SHALL BE Df 4. GUARDRAIL LOCATIONS ARE APPROXIMATE. EXACT LENGTH, LOCATION AND APPROPRIATE END TREATMENTS ACCEPTED WITHOUT PRIOR PERMISSION FROM THE ENGINEER OR GENERAL CONSTRUCTION NOTES FOR STORMWATER MANAGEMENT PLANS WILL BE FIELD VERIFIED AT THE TIME OF CONSTRUCTION. ADDITIONAL GUARDRAIL MAY BE REQUIRED AT LANDSCAPE ARCHITECT. LOCATIONS NOT SHOWN WHEN, IN THE OPINION OF THE COUNTY ENGINEER, OR DESIGNEE, IT IS DEEMED 6. SEEDED AREAS SHAH, BE INSPECTED BYTHE ENGINEER OR LANDSCAPE SCOTT C. BLOSSOM L. ALL DAMS AND CONSTRUCTED FILL TO BE WITHIN 95% OF MAXIMUM DRY DENSITY AND 2% OF OPTIMUM MOISTURE CONTENT. ALL NECESSARY. WHEN GUARDRAIL IS REQUIRED, IT SHALL BE INSTALLED FOUR (4) FEET OFFSET FROM THE EDGE ARCHITECT AT THE COMPLETION OFTHE SEEDING OPERATIONS AND Lie. No. 40287 FILL MATERIAL TO BE APPROVED BY A GEOTECHNICAL ENGINEER A GEOTECHNICAL ENGINEER IS TO BE PRESENT DURING OF PAVEMENT TO THE FACE OF GUARDRAIL, AND ROADWAY SHOULDERWIDTHS SHALL BE INCREASED TO ACCEPTED SUBJECrTO COMPLIANCEWIITI SPECIFIED MATERIALS AND CONSTRUCTION OF DAMS. SEVEN (7) FEET. INSTALLATION REQUIREMEN15. O. `v �SsIONAL 5. WHERE ARE INSTALLED, ALL RESIDENTIAL DRIVEWAY ENTRANCES SHALL CONFORM 7. TEMPORARY SEEDING SHALL BE APPLIED TOLLL DENUDED/DISTURBED 2. PIPE AND RISER JOINTS ARE TO BE WATERTIGHT WITHIN STORMWATER MANAGEMENT FACILITIES. (A, G~$ B OR C).SECIIONS TO DOT CURBAN 6. WHERE RURAL CROSS SECTIONS ARE INSTALLED, ALL RESIDENTIAL DRIVEWAY ENTRANCES SHALL CONFORM TO AREAS AND ALL SOIL STOCKPILES THAT WILL NOT BE BROUGHT TO FINAL 3. FOR TEMPORARY SEDIMENT TRAPS OR BASINS WHICH ARE TO BE CONVERTED TO PERMANENT STORMWATER MANAGEMENT PE -GRADE OR REMOVED FROM THE SITE WITHIN 14 DAYS. OT STANDARD PE FACILITIES; CONVERSION IS NOT TO TAKE PLACE UNTIL THE SITE IS STABILIZED, AND PERMISSION HAS BEEN OBTAINED FROM THE 7. COMPLIANCE WITH THE MINIMUM PAVEMENT WIDTH, SHOULDER WIDTH AND DITCH SECTIONS, AS S. CONTRACTOR SHALLBE RESPONSIBLEFOR VERIFYINGACTUALAMOUNTOF COUNTY EROSION CONTROL INSPECTOR. SHOWN ON THE TYPICAL PAVEMENT SECTION DETAIL, SHALL BE STRICTLYADHERED TO. STABILIZATION SEED MIXES REQUIRED. 8. ROAD PLAN APPROVAL FOR SUBDIVISIONS IS SUBJECT TO FINAL SUBDIVISION PLAT VALIDATION. SHOULD Job NO: 1005 Drawn By: BCE 4. SELECT E8r3 MEASURES MAY BE IMPLEMENTED DURING PHASE T STAGE 1 CONSTRUCTION AND THEN MODIFIED DURING STAGE 2.5. THE FINAL PLAT FOR THIS PROJECT EXPIRE PRIOR TO SIGNING AND RECORDATION, THEN APPROVAL OF THESE r \ DETAIL: TEMP. SEEDING NOTES PROPOSED TEMPORARY STREAM CROSSINGS WILL BE DESIGNED AND IMPLEMENTED TO AVOID IMPACTS IN AREAS SHOWN AS PLANS SHALL BE NULL AND VOID. / NTS Data. 12.04.2017 1 Checked By: scan c. Blossom, P.E. PRESERVED ON THE PERMIT APPLICATION. 9. ALL SIGNS OR OTHER REGULATORY DEVICES SHALL CONFORM WITH THE VIRGINIA MANUAL FOR UNIFORM \/ E & S DETAILS (4) TRAFFIC CONTROL DEVICES AND THE ALBEMARLE COUNTY ROAD NAMING AND PROPERTY NUMBERING ORDINANCE AND MANUAL. 10. TRAFFIC CONTROL OR OTHER REGULATORY SIGNS OR BARRICADES SHALL BE INSTALLED BY THE DEVELOPER WHEN, IN THE OPINION OF THE COUNTY ENGINEER, OR DESIGNEE, THEY ARE DEEMED NECESSARY IN TEMPORARY STABILI-TION/SPJISONAL NURSE CROP) ORDER TO PROVIDE SAFE AND CONVENIENT ACCESS. EL�= BE -IN ME COMMON NAME I SPECIFICADON SEEDING CAREPATE has./AceeT U. THE SPEED LIMITS TO BE POSTED ON SPEED LIMIT SIGNS ARE 5 MPH BELOW THE DESIGN SPEED, OR AS DETERMINED BY DOT FOR PUBLIC ROADS. _ TEMPORARv sT�alLizATIONreEAsoNAL FMAau 2 NURSEIS 12. VDOT STANDARD CD-T OR CHI CROSS -DRAINS UNDER TO BE INSTALLED UNDER THE SUBBASE SBY S.MAacH' BOANCE wuH sEEOINs OATEs sHawN MATERIAL AT ALL CUT AND FILL TRANSITIONS AND GRADE SAG POINTS AS SHOWN ON THE ROAD PROFILES. uaocRLOALaAMosAM aaowN TOP MIL�LFT SEED - T3. A VIDEO CAMERA INSPECTION IS REQUIRED FOR ALL STORM SEWERS AND CULVERTS THAT ARE DEEMED AUGUST16-OCTOREIR31 is INACCESSIBLE TO DOT OR COUNTY INSPECTIONS. THE VIDEO INSPECTION SHALL BE CONDUCTED IN r /1 ACCORDANCE WITH DOTS VIDEO CAMERA INSPECTION PROCEDURE AND WITH A DOT OR COUNTY C L 0 INSPECTOR PRESENT. RLSPATryA,en:Iscnrn srvennePax_Ese_aEvze I1.Il u,21-1irssl 11 ESro IE(1) RIVANNA VILLAGE: EROSION AND SEDIMENT CONTROL PLAN TYPICAL CONSTRUCTION SEQUENCE TYPICAL CONSTRUCTION SEQUENCE, (CONT.) BLOCK I AND G (AND STAGING AND STOCKPILE AREA) BLOCKS J WEST AND PARK AREAS 3t. CLEARING AND GRUBBING FOR TRAILS IN PARK AREAS TO OCCUR ONLY AS NEEDED FOR ACCESS AND THEN CONCURRENTLY WITH t. CONTRACTOR TO STAKE OUT LIMITS OF DISTURBANCE PRIOR TO START OF CONSTRUCTION. INSTALLATION OF SEDIMENT CONTROL PRACTICES. AMENDMENT 1 AND PHASE II ALBEMARLE COUNTY, V I RGIN IA 2. CONTRACTOR SHALL MAINTAIN PHASE t CE i AND CE 2 AS NEEDED TO INITIATE PHASE 2 CONSTRUCTION ACTIVITIES ACCORDING TO PLAN 32. DIVERSION CHANNELS, RIGHT OF WAY DIVERSIONS AND SEDIMENT TRAPS IN BLOCK J WEST TO BE INSTALLED AS DEPICTED IN DETAIL ON VIEW SHEET 3 AND PER THE PAVED WASH RACK DETAIL 7 ON SHEET t7. SHEETS t7 AND t8 AND AS SHOWN ON SHEETS �5-18 IN PLAN VIEW. TRAPS SHALL BE FUNCTIONAL PRIOR TO UPSTREAM GRADING ACTIVITIES, 3. CONTRACTOR TO INSTALL TEMPORARY STREAM CROSSINGS #3 TO ACCESS BLOCK G FROM EXTENDING PARK STREET AND TEMPORARY AND SHALL BE INCREMENTALLYADJUSTED/RAISED AS SITE EARTHWORK OPERATIONS PROGRESS. STREAM CROSSING #q (IN APPROVED PERMANENT STREAM IMPACT AREAS UPSTREAM OF PROPOSED POND EMBANKMENT) TO ACCESS 33. CONTRACTOR TO CLEAR AND GRUB BLOCKS J WEST AND PERFORM ROUGH UPON TEMPORARY STABILIZATION OF SEDIMENT TRAPPING BLACK I AND PROPOSED STOCKPILE AREA. AND DIVERSION PRACTICES. 4. SILT FENCE TO BE INSTALLED ON THE DOWN SLOPE SIDE OF ACCESS ROADS AND STOCKPILE IN BLOCK I. TREE PROTECTION SHALL BE 34. CONTRACTOR TO INSTALL RETAINING WALLS AS ROAD GRADES ARE REACHED, AND ADJUST SEDIMENT TRAP GRADES IN STAGE z TO INSTALLED ALONG REMAINING STREAM BUFFER BOUNDARY IN BLOCKJ AS SHOWN ON SHEET 3. REACH STAGE 2 SEDIMENT GRADES. ALL DENUDED OR DISTURBED AREAS TO BE PERMANENTLY STABILIZED IMMEDIATELY AFTER FINAL 5. INSTALL TRAPS IN BLOCK G AND SEDIMENT BASIN It PER DETAILS i AND 2 ON SHEET 17. SEDIMENT BASIN CS2 TO REMAIN ONLINE GRADE. THROUGHOUT PHASE t AND PHASE 2 CONSTRUCTION. INSTALL DIVERSION CHANNELS IN BLOCK I AND G PER DETAIL 8 ON SHEET t7. 35. SEDIMENT TRAPS SHALL NOT BE CONVERTED TO PERMANENT BMPS (AS SHOWN IN STAGE 3 STORMWATER PLANS) UNTIL THE UPSTREAM 6. CLEARING AND GRUBBING OPERATIONS TO OCCUR ONLY AS NEEDED FOR ACCESS ROADS AND CONCURRENTLY WITH THE INSTALLATION OF WATERSHED IS STABILIZED PERIMETER EROSION AND SEDIMENT CONTROL PRACTICES IN BLOCK I AND G. ACCESS ROADS TO BE CONSTRUCTED ALONG PROPOSED BLOCK G I AND J (STAGE 2 EROSION AND SEDIMENT CONTROL) ALIGNMENT OF PARK STREET AND CAPITAL DRIVE, AROUND STAGING AND STOCKPILE AREAS. ALTERNATIVE ROUTES MAY BE BY COUNTY STAFF IN ORDER TO REDUCE EROSION AND DOWNSTREAM SEDIMENTATION. 36. ALL ACCESS ROADS TO BE PROTECTED IN A MANNER APPROVED BY PROJECT ENGINEER MULCH, STONE, AND TIMBER MATS ARE DICE 7. CLEARING AND GRUBBING OF STAGING AND STOCK PILING AREA CAN OCCUR UPON TEMPORARY STABILIZATION OF SEDIMENT BASIN It AND PREFERRED UNTIL PAVING OPERATIONS ARE COMPLETE. I2, SEDIMENT TRAPS IN BLOCK G, ASSOCIATED DIVERSION CHANNELS, AND RIGHT OF WAY DIVERSION IN BLOCK G. 37. AS ROADS AND INFRASTRUCTURE ARE INSTALLED, IT WILL BE NECESSARY TO BEGIN CONVERSION OF TEMPORARY EROSION AND Blossom Consulting and Engineering Inc. 1101 Professional Drive, Suite G B. STAGING AND STOCK PILING AREA TO BE TEMPORARY STABILIZED UPON COMPLETION OF TEMPORARY GRADING. SEDIMENT CONTROL TRAPS AND BASINS TO STAGE z GRADES. SEDIMENT TRAPS AND BASINS SHALL BE ROUGH GRADED TO STAGE z ELEVATIONS AS SITE EARTHWORK OPERATIONS PROGRESS, BUT SHALL NOT BE COMPLETED UNTIL THE UPSTREAM WATERSHEDS ARE 9. ACCESS ROAD TO BE PROTECTED IN A MANNER APPROVED BY PROJECT ENGINEER. MULCH, STONE, AND TIMBER MATS ARE PREFERRED. STABILIZED. Williamsburg VA 23185 ACCESS ROAD STABILIZATION TO BE INSPECTED REGULARLY IN ORDER TO MAINTAIN EROSION CONTROL. 38. CONTRACTOR SHALL ADJUST SILT FENCE AS SHOWN ON STAGE z EROSION AND SEDIMENT CONTROL SHEETS AS NEEDED TO MAINTAIN P: 757-870-4825 BLOCK HAND BLOCKJ WEST PERIMETER CONTROLS DOWNSTREAM OF STAGE 2 GRADING ACTIVITIES (INCLUDING DOWNSTREAM OF PROPOSED EMBANKMENT io. SILT FENCE TO BE MAINTAINED ON THE DOWN SLOPE SIDE OF ACCESS ROAD IN BLOCK H AND INSTALLED IN BLOCK J WEST. ASSOCIATED WITH STAGE 2 SEDIMENT BASIN I2). u. CLEARING AND GRUBBING (ANY REMAINING AFTER PHASE t ACTIVITIES) TO OCCUR ONLY AS NEEDED TO MAINTAIN ACCESS ROAD FROM 39. ALL DENUDED OR DISTURBED AREAS TO BE PERMANENTLY STABILIZED IMMEDIATELY AFTER FINAL GRADE. PROPOSED STEAMER DRIVE INTERSECTION ON PROPOSED PARK STREET AND TO CREATE ACCESS ROAD THROUGH BLOCK H AND TO BLOCK J BLOCKJ (STAGE 2 SEDIMENT BASIN I2) WEST. EXISTING SEDIMENT TRAPS TO BE MAINTAINED PER VESCH STANDARDS AND SHALL BE FUNCTIONAL PRIOR TO UPSTREAM GRADING ACTIVITIES 40. CLEARING AND GRUBBING ALONG EXISTING DAM EMBANKMENT TO OCCUR ONLY AFTER UPSTREAM WATERSHED IS STABILIZED AND GRADING ACTIVITIES ARE COMPLETE. STORM DRAINAGE INFRASTRUCTURE SHALL BE INSTALLED CONCURRENT WITH EARTHWORK tz. CONTRACTOR TO PERFORM ROUGH GRADING FOR BLOCK H AND CAN INITIATE GRADING ACTIVITIES FOR BLOCK J WEST ONLY AFTER ACTIVITIES AND DIRECTED TO PROPOSED OUTFALL LOCATIONS WITH OUTFALL PROTECTION INSTALLED. SEDIMENT TRAPS, DIVERSION DIKES AND RIGHT OF WAY DIVERSIONS IN BLOCK J WEST ARE IN PLACE AND STABILIZED. qi. CONTRACTOR TO INSTALL PUMP AROUND AND/OR DIVERSION CHANNEL WITHIN APPROVED IMPACT AREAS TO BY PASS OFF SITE STREAM 13. ALL DENUDED OR DISTURBED AREAS TO BE PERMANENTLY STABILIZED IMMEDIATELY AFTER FINAL GRADE. FLOW AROUND DISTURBED AREAS DURING CONSTRUCTION OF STAGE z SEDIMENT BASIN It. BLOCK I 42. CONTRACTOR SHALL EXCAVATE STAGE 2 BASIN I2 TO PROPOSED GRADES AS DEPICTED ON SHEET tt AND SHOWN IN THE STORMWATER A. CONTRACTOR SHALL INSTALL CONSTRUCTION ENTRANCE CE3 (ONLY AT WHICH TIME ACCESS FROM ROUTE 250 IS NEEDED). ACCESS CAN PLANS AFTER BLOCKS C AND I ARE STABILIZED. CONSTRUCT EMBANKMENT AS DETAILED IN THE STORMWATER PLANS AND INSTALL CONTINUE THROUGH PHASE t AND THROUGH BLOCK I AND G AS LONG AS PRACTICABLE IN CONSIDERATION OF FINISHED LOTS. PRINCIPAL SPILLWAY AND EMERGENCY SPILLWAYS. t5. DIVERSION CHANNELS PARALLEL TO EXISTING FLOW PATHS AND CHANNELS ARE NECESSARY TO DIVERT RUNOFF FROM DISTURBED 43. STAGE 2 SEDIMENT BASIN It CAN BE CONVERTED TO PERMANENT LIMP It WHEN THE CONTRIBUTING WATERSHED IS STABLE, AND INLET AREAS TO EROSION AND SEDIMENT CONTROL FACILITIES WHILE MAINTAINING BASE FLOW IN EXISTING STREAM CHANNELS. DIVERSIONS PROTECTION IS INSTALLED AT ALL UPSTREAM INLETS. REFER TO STORMWATER PLANS FOR FINAL CONVERSION SEQUENCE. IN BLOCK I (NORTH), DOWN SLOPE OF ROUTE 25o SHALL BE IN PLACE PRIOR TO MAIN CLEARING AND GRUBBING ACTIVITIES. 44. ALL DENUDED OR DISTURBED AREAS TO BE PERMANENTLY STABILIZED IMMEDIATELY AFTER FINAL GRADE IS REACHED.. t6. CLEARING AND GRUBBING TO OCCUR ONLY AS NEEDED FOR ACCESS ROAD, STOCKPILE, AND THE INSTALLATION OF EROSION AND SEDIMENT CONTROL PRACTICES ALONG BUTTERFIELD LANE AND TERRAPIN CIRCLE. 17. ACCESS ROAD TO BE PROTECTED IN A MANNER APPROVED BY PROJECT ENGINEER. MULCH, STONE, AND TIMBER MATS ARE PREFERRED. KEY PLAN t8. PERIMETER SEDIMENT CONTROLS SUCH AS SILT FENCE, DIVERSION CHANNELS, AND SEDIMENT TRAPS AND BASINS (AS NOTED ABOVE) TO BE INSTALLED AS DEPICTED IN DETAILS ON SHEETS t7 AND t8 AND AS SHOWN ON SHEET 5-9 IN PLAN VIEW. ALL PERIMETER EROSION AND SEDIMENT CONTROLS SHALL BE FUNCTIONAL PRIOR COMMENCEMENT OF GRADING OPERATIONS. t9. INSTALL TEMPORARY STREAM CROSSING #6 TO ACCESS BLOCK I EAST 2o. INSTALL SEDIMENT BASIN I2 AND ASSOCIATED DIVERSION CHANNELS PRIOR TO CLEARING AND GRUBBING IN BLOCK I EAST. 21. CONTRACTOR TO CLEAR AND GRUB REMAINING AREAS IN BLOCK I (NORTH OF CAPITAL DRIVE) WHILE SEDIMENT TRAPS, DIVERSIONS AND SEDIMENT BASIN It REMAINS FUNCTIONAL. CONTRACTOR TO PERFORM ROUGH GRADING PER VESCH STANDARDS. 22. ALL DENUDED OR DISTURBED AREAS TO BE PERMANENTLY STABILIZED IMMEDIATELY AFTER FINAL GRADE. BLOCK I (ROUTE 250 ENTRANCE) AND BLOCK J EAST 23. CONTRACTOR SHALL INSTALL CONSTRUCTION ENTRANCE CE4 AND WASH RACK AT THE ROUTE 250 CONCURRENT WITH THE ENTRANCE PLAN CONSTRUCTION AS SHOWN ON ROUTE z5o ENTRANCE PLANS PREPARED BYALAN FRANKLIN P.E. ISSUE 24. CONTRACTOR TO INSTALL TEMPORARY STREAM CROSSING #7 TO ACCESS BLOCK J WEST. 25. CLEARING AND GRUBBING TO OCCUR ONLY AS NEEDED FOR ACCESS ROAD AND CONCURRENTLY WITH INSTALLATION OF STRUCTURAL REV# DATE DESCRIPTION EROSION AND SEDIMENT CONTROL PRACTICES. 26. ACCESS ROAD TO BE PROTECTED IN A MANNER APPROVED BY PROJECT ENGINEER. MULCH, STONE, AND/OR TIMBER MATS ARE #t 3/2/t8 PER COUNTY COMMENTS PREFERRED. #2 4/t6/t8 PER COUNTY COMMENTS 27. SEDIMENT TRAPS, DIVERSION CHANNELS AND RIGHT OF WAY DIVERSIONS TO BE INSTALLED AS DEPICTED IN DETAIL ON SHEETS to-14 PRIOR TO INITIATING GRADING ACTIVITIES IN BLOCK J EAST. RIGHT OF WAY DIVERSIONS UP SLOPE OF BLOCK J EAST GRADING SHALL BE IN PLACE TO DIRECT OFF SITE RUNOFF AROUND DISTURBED AREAS DURING CONSTRUCTION. ALL E&S MEASURES SHALL BE FUNCTIONAL PRIOR TO UPSTREAM AND DOWNSTREAM GRADING ACTIVITIES. 28. CONTRACTOR TO CLEAR AND GRUB BLOCK J EAST UPON TEMPORARY STABILIZATION OF SEDIMENT TRAPPING AND DIVERSION PRACTICES. 29. CONTRACTOR TO PERFORM ROUGH GRADING. So. ALL DENUDED OR DISTURBED AREAS TO BE PERMANENTLY STABILIZED IMMEDIATELY AFTER FINAL GRADE. o{ '0H Op `f� SCOTT C. BLOSSOM Lie. No. 40287 'A �wr t �SsIONAL V1 Job No: 1005 Drawn By: BCE Dale: 12.04.2017 Checked By: soon C. Blossom, P.E. E 8 S NOTES ES - 21 Section 5. Stormwater Management Plan (Provide a reduced I lx17 copy of the latest Stormwater Management Plan. Do not reference only). A copy of the Stormwater Management Plan is provided in Section 5 of this SWPPP. This SWPPP was prepared for submittal concurrent with the stormwater management plans for review by the VSMP Authority. Once approved, the approved stormwater management plan is hereby incorporated by reference as part of this SWPPP. The VSMP authority shall require the provision of long-term responsibility for and maintenance of stormwater management facilities and other techniques specified to manage the quality and quantity of runoff. Such requirements shall be set forth in an instrument recorded in the local land records prior to state permit termination or earlier as required by the VSMP authority and shall at a minimum: (1) Be submitted to the VSMP authority for review and approval; (2) Be stated to run with the land; (3) Provide for all necessary access to the property for purposes of maintenance and regulatory inspections; (4) Provide for inspections and maintenance and the submission of inspection and maintenance reports to the VSMP authority; and (5) Be enforceable by all appropriate governmental parties. Copies of signed maintenance agreements for stormwater management facilities should be included in Appendix C. 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D N O Z Z ° o om F > 2 ZN 09 m D ° o� 2 a D K 9 M o o 20 7 &y3vom ",Vs.m�H0z D D Cn uNm p co�,v-' °mm �ma �z O� D m � Z mZ Sm °A �z o ; D �. cy �< Z Z _ � v M r <� �1r D CD �m m D Z '•••• •_ � �*� 0000000000 a�Nro zo[n ,�,vro 00JJ k>rf"i.0 �t�.fb O[F["aff,,0 o�n0 30 °OHZO "'�z0 �O �e1 SryC �� CCCCF "'O� ,�yCO ZZyyOy zwd dHG '��b �U �[[Onn90 m090 AO tJ MO A broil A�z Eli your o�� o H H zZi nv z n _ _ z etyma > n y n •� mF�ay ��: �`� •, mz�mAmz�< � 0 ♦� �♦ .� gi M y �_ 1001, _ i JJ \ \ • mot'\ � \ a.� • • a\, a � d � •.�1� _ �,'� , ice' � i �pol � - lop ,.�' i i 0tM \N ♦ , j� �tij �I o� �z Yr` •Yi •\`"_A � O •ice ••OJT i/�"' ��, i O / O 1/, o ogo /oo l-. `I``wo A zS�soa s> rn 0 C z 00 Z N m N�oMz N A o # N m m D Z �aacm 9z m�Hom N d 1 m 1101 y y co O D /^) `+ I C 3 D p �� a c o �� m m N v-' �m� mm OG C w �� g� r m Z m Z Z N cr�� - D zZ �G <� mr t� N 1 z v �lti� ER VI z < m Z7 r D D m r o z= Zm D m rn m ° 3 m m Section 6. Pollution Prevention Plan (reference County Code 17-404 and State Regulation 9VAC25-880-70 part II section AA) A. Plan showing pollution activities and prevention practices (Provide a reduced I Ix17 copy of a site plan on which all of the following activity locations are clearly marked. Keep this plan up-to-date with ongoing site changes and inspections.) A pollution prevention plan is provided in Section 6 of this SWPPP. This plan shows the proposed locations of support activities including equipment and vehicle washing, storage areas for chemicals, concrete washout areas, vehicle fueling and maintenance areas, sanitary waste facilities (portable toilets), and construction waste storage. Should these proposed locations change, the new locations of the activities will be identified on the pollution prevention plan. Issued — 10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County o O C�� 0 Ox / >�:i".. CAI N O rnZ Om yxc OHO �O z0 cn O hi z m� �O �m� �Om 11 mN 11 m� y �c mI m m m m m -qm fll ��' r C) y DDT >,O �O m0 z i ,... A� DO 002z mmm p O z r ti , /f {l m \ i lop Cl } �♦ oaJ 41 it =� 1 � i 1 Frt rt F ♦ — — '`4k 11/410 �V �o It oo 0 (n.- z .��„�� emu, � � �°♦ z m a:— O ...,� m z 0 .ry�q�q�q�q �� ♦ \ v> 1 � CCo \ \ z - a♦ m mcn • — ,♦ I (n z -- ♦ ym0 r �.1 j ♦. 1 2 O -V m D mm ZO— / �� .� ♦. m cn m i �♦ _ — - tn U) _ z p -� ♦°♦ _�:E ; ♦� \ , m�z Ito" 1T1 ° m m 9F,m 3 c 3 C m >m� l m ;o-' m m r T m r C: D V b m ^ �1 1 A � � ny �ZZ m A _ Ocm r�D zs 1 _ Z Z g mr s m m z < <r m A mD Z zMELL L s D m 3 m m m B. Sources of Pollutants, locations, and prevention practices Pollutant, or Pollutant Location on site Prevention Practices, Generating Activity Control Measures If practicable, all refueling shall be conducted in a manner to reduce the potential for contamination of onsite Approximate estimated location shown resources. Care should be taken, where Vehicle/equipment fueling on pollution prevention plan feasible, to avoid activities within 150 feet of storm drains, wetlands, streams, water bodies, tree preservation areas or any other environmentally sensitive areas. Spill response kits should be provided onsite. The contractor will regularly inspect the site to insure proper disposal methods of Used oil storage Current designated container areas on used oils are followed. Petroleum plan produces will be stored in tightly sealed containers which are clearly labeled. Spill response kits should be provided onsite. All onsite vehicles will be monitored for Approximate estimated location shown leaks and receive regular preventive Vehicle/equipment maintenance on pollution prevention plan maintenance to reduce the chance of leakage. Spill response kits should be provided onsite. The operator should assure that employees are aware of all applicable wastes, disposal practices, and applicable disposal locations. All waste materials will be Demolition and debris disposal Where needed collected and stored in a proper receptacle in accordance with all local and State solid waste management regulations. Waste will be hauled to an appropriate waste disposal site. No construction waste materials will be buried onsite. Issued — 10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County C. Sources of Pollutants continued. Common activities and minimum control and prevention practices Pollutant, or Pollutant Location on site Prevention Practices, Generating Activity Control Measures Follow erosion and sediment control plan. Clearing, grading, excavating, and un- Land disturbance area Dispose of clearing debris at acceptable stabilized areas disposal sites. Seed and mulch, or sod within 7 days of land clearing Cover storm drain inlets and use drip pans Paving operations Roads and driveways and absorbent/oil dry for all paving machines to limit leaks ands ills Direct concrete wash water into a leak - Concrete washout and Approximate estimated location shown Proof container or leak -proof settling basin that is designed so that no overflows can cement waste on pollution prevention plan occur. See EPA fact sheet for concrete washout (Appendix G . Enclose or cover material storage areas. Mix paint indoors in a containment area or Structure construction, stucco, Structures in a flat unpaved area. Prevent the painting, and cleaning discharge of soaps, solvents, detergents and wash water, paint, form release oils and curing compounds. Water shall be filtered, settled or similarly Dewatering operations Dewatering sites shown on plan treated prior to discharge as shown on plan. Designated areas for material delivery and Material delivery and storage Approximate estimated location shown storage. Placed near construction on pollution prevention plan entrances, away from waterways and drainage paths Material use during building process Building areas Follow manufacturer's instructions. MSDS's attached. Waste collection area will not receive a substantial amount of runoff from upland areas and does not drain directly to a Solid waste disposal Current designated container areas on waterway. Containers have lids covered plan before periods of rain, or are in a covered area. Scheduled collection to prevent overfilling. MATERIALS NOT TO BE BURIED ONSITE Convenient and well -maintained portable Approximate estimated location shown sanitary facilities will be provided, and Sanitary waste on pollution prevention plan located away from waterways or inlets. Such facilities shall be regularly maintained. Apply fertilizers in accordance with Site stabilization/landscaping Landscape areas shown on plan manufacturer's recommendations and not during rainfall events To be treated in a sediment basin or better Wash Waters Wash areas shown on plan control as specified on plan. Minimize the discharge of pollutants from equipment and vehicle washing Vehicle and equipment washing Approximate estimated location shown Provide containment and filtering for all on pollution prevention plan wash waters per the plan Minimization of exposure to precipitation and stormwater. Minimize the exposure of building materials, building products, construction wastes, trash, landscape materials, fertilizers, pesticides, herbicides, detergents, sanitary waste, and other materials present on the site to precipitation and to stormwater. Issued — 10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County (Identify all non-stormwater discharges to occur on your site. Keep this plan up-to-date with ongoing site changes and inspections. See CGP, 9VAC25-880-70 section E for examples of non-stormwater discharges.) D. Non-stormwater discharges The following non-stormwater discharges from construction activities are authorized by the general permit. Discharge Pollutants or Pollutant Location on Site Constituents Discharges from firefighting activities Sediment Where needed Fire hydrant flushings Sediment Where needed Water used to wash vehicles or equipment where soaps, solvents, or Approximate estimated location shown on detergents have not been used and the Sediment, oil & grease, metals pollution prevention plan wash water has been filtered, settled, or similarly treated prior to discharge Water used to control dust that has been filtered, settled, or similarly Sediment Entire site, if needed treated prior to discharge Potable water source, including Sediment Where needed uncontaminated waterline flushings Routine external building wash down where soaps, solvents, or detergents have not been used and the wash water Sediment Where needed has been filtered, settled, or similarly treated prior to discharge Pavement wash water where spills or leaks of toxic or hazardous materials have not occurred (or where all spilled or leaked material has been removed prior to washing); where soaps, Sediment Where needed solvents, or detergents have not been used; and where the wash water has been filtered, settled, or similarly treated prior to discharge Uncontaminated air conditioning or Sediment Where needed compressor condensate Uncontaminated groundwater or Sediment Where needed spring water Foundation or footing drains where flows are not contaminated with Sediment Where needed process materials such as solvents Uncontaminated, excavation dewatering, including dewatering of trenches and excavations that have Sediment Where needed been filtered, settled, or similarly treated prior to discharge Landscape irrigations Sediment, fertilizers Where needed Issued — 10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County E. Persons responsible for pollution prevention practices (Persons responsible for prevention practices as listed above.) Operator(s): Rivanna Investment Holdings LLC c/o Mr. Tim Culpepper 477 Viking Drive, Suite 405 Virginia Beach, VA 23452 757-282-1010 tulpeppergrobinsondevelopment. com Project Manager(s) or Site Supervisor(s): Haley, Chisholm & Morris, Inc. Mr. David Hamer, Superintendent Mr. Mike Boggs P.O. Box 550 Earlysville, VA 22936 434-978-1000 Stormwater Manager(s) or SWPPP Contact(s): Haley, Chisholm & Morris, Inc. Mr. David Hamer, Superintendent Mr. Mike Boggs P.O. Box 550 Earlysville, VA 22936 434-978-1000 Contracor(s): Haley, Chisholm & Morris, Inc. Mr. David Hamer, Superintendent Mr. Mike Boggs P.O. Box 550 Earlysville, VA 22936 434-978-1000 Subcontractor(s): The subcontractor(s) was not determined at the time of SWPPP development. Once the subcontractor(s) is identified, subcontractor certifications will be included in Appendix F of the SWPPP. Emergency 24-Hour Contact(s): Haley, Chisholm & Morris, Inc. Mr. David Hamer, Superintendent Mr. Mike Boggs P.O. Box 550 Earlysville, VA 22936 434-978-1000 Rivanna Vil Mr. Andrew 314 East W, Charlottesvi 434-284-40( andrew.boni Issued — 10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County F. Response and reporting practices Minimize discharges from spills and leaks. Minimize the discharge of pollutants from spills and leaks and implement chemical spill and leak prevention and response procedures as follows. Respond to all spills, leaks and discharges as follows; Report all spills, leaks and discharges as follows; (Provide detailed response and reporting practices according to 9VAC25-880-70, Part II, section A.4.e.) Spill Prevention and Response The following practices will be followed for spill prevention and cleanup: • Products will be kept in original containers unless they are not resealable. • Original specimen labels and materials safety data sheets will be kept on file; they contain important product information. • If surplus product must be disposed of, manufacturers' and/or local and State recommended methods for proper disposal will be followed. • Manufacturers' recommended methods for spill cleanup will be clearly posted and site personnel will be made aware of the procedures and the location of the information and cleanup supplies. • Materials and equipment necessary for spill cleanup will be kept in the material storage area onsite. Equipment and materials may include but not be limited to cleanup kits, brooms, dust pans, mops, rags, gloves, goggles, dirt to contain spill, containment boom, absorbent material (e.g. hay, kitty litter, sand, sawdust) and plastic and metal trash. • All spills will be cleaned up immediately after discovery. • In the event of a spill of a hazardous substance, the spill will be immediately contained and the spill area will be kept well ventilated. Personnel will wear appropriate protective clothing to prevent injury from contact with a hazardous substance during cleanup operation. • Spills of toxic or hazardous material will be reported to the appropriate State or local government agency, as required by regulatory standards. • The contractor or his representative will be responsible for spill prevention and coordination. • The spill prevention and control procedures will be implemented once construction begins onsite. When a spill occurs, the following individuals/agencies shall be considered for notification. Issued — 10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County Spill Notification Table Person or Agency Telephone Number Albemarle County Water Resources Management (MS4 Program) 434 296-5816 VA Department of Environmental Quality (DEQ) Pollution Response Program VRO (540) 574-7854 VA Department of Emergency Management (DEM) 1-800-468-8892 24 hour # VA Department of Environmental Quality (DEQ) VRO 540 574-7800 Local Emergency Response 911 24 hour # Spill Reporting Reports of Unauthorized Discharges • Any operator who discharges or causes or allows a discharge of sewage, industrial waste, other wastes or any noxious or deleterious substance or a hazardous substance or oil in an amount equal to or in excess of a reportable quantity established under either 40 CFR Part 110, 40 CFR Part 117, 40 CFR Part 302, or § 62.1-44.34:19 of the Code of Virginia that occurs during a 24-hour period into or upon surface waters or who discharges or causes or allows a discharge that may reasonably be expected to enter surface waters, shall notify the Department of Environmental Quality of the discharge immediately upon discovery of the discharge, but in no case later than within 24 hours after said discovery. A written report of the unauthorized discharge shall be submitted to the department and the VSMP authority within five days of discovery of the discharge. The written report shall contain: 1. A description of the nature and location of the discharge; 2. The cause of the discharge; 3. The date on which the discharge occurred; 4. The length of time that the discharge continued; 5. The volume of the discharge; 6. If the discharge is continuing, how long it is expected to continue; 7. If the discharge is continuing, what the expected total volume of the discharge will be; and 8. Any steps planned or taken to reduce, eliminate and prevent a recurrence of the present discharge or any future discharges not authorized by the general permit. • Discharges reportable to the department and the VSMP authority under the immediate reporting requirements of other regulations are exempted from this requirement. • A Spill Report Form is provided in Appendix D of this SWPPP. Reports of Unusual or Extraordinary Discharges. • If any unusual or extraordinary discharge including a "bypass" or "upset", as defined in the permit, should occur from a facility and the discharge enters or could be expected to enter surface waters, the operator shall promptly notify, in no case later than within 24 hours, the Issued — 10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County department and the VSMP authority by telephone after the discovery of the discharge. This notification shall provide all available details of the incident, including any adverse effects on aquatic life and the known number of fish killed. The operator shall reduce the report to writing and shall submit it to the department and the VSMP authority within five days of discovery of the discharge in accordance with Section 11112 in the permit. Unusual and extraordinary discharges include but are not limited to any discharge resulting from: 1. Unusual spillage of materials resulting directly or indirectly from processing operations; 2. Breakdown of processing or accessory equipment; 3. Failure or taking out of service of some or all of the facilities; and 4. Flooding or other acts of nature. Reports of Noncompliance. • The operator shall report any noncompliance which may adversely affect surface waters or may endanger public health. An oral report to the department and the VSMP authority shall be provided within 24 hours from the time the operator becomes aware of the circumstances. The following shall be included as information that shall be reported within 24 hours under this subdivision: a. Any unanticipated bypass; and b. Any upset that causes a discharge to surface waters. 2. A written report shall be submitted within five days and shall contain: a. A description of the noncompliance and its cause; b. The period of noncompliance, including exact dates and times, and if the noncompliance has not been corrected, the anticipated time it is expected to continue; and c. Steps taken or planned to reduce, eliminate, and prevent reoccurrence of the noncompliance. The department may waive the written report on a case -by -case basis for reports of noncompliance under Section III I in the permit if the oral report has been received within 24 hours and no adverse impact on surface waters has been reported. 3. The operator shall report all instances of noncompliance not reported under Section III I 1 or 2 (in the permit) in writing as part of the SWPPP. The reports shall contain the information listed in Section 11112 (in the permit). NOTE: The reports required in Section III G, H and I (in the permit) shall be made to the department and the VSMP authority. Reports may be made by telephone, email, or by fax. For reports outside normal working hours, leaving a recorded message shall fulfill the immediate reporting requirement. For emergencies, the Virginia Department of Emergency Management maintains a 24-hour telephone service at 1-800-468-8892. 4. Where the operator becomes aware of a failure to submit any relevant facts, or submittal of incorrect information in any report, including a registration statement, to the department or the VSMP authority, the operator shall promptly submit such facts or correct information. Issued — 10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County G. Pollution Prevention Awareness (Describe training and procedures to provide awareness and compliance for all measures in this document; waste management, wash waters, prevention measures, etc.) The operator should assure that employees are aware of all applicable wastes, including wash water, disposal practices, and applicable disposal locations of such wastes, in order to comply with the conditions of the CGP. The DEQ recommends that subcontractor certifications should be obtained. Once the subcontractor(s) is identified, subcontractor certifications should be incorporated by reference as part of this SWPPP and will be included in Appendix F of the SWPPP. Personnel should be educated in spill prevention, area of possible pollution, and spill response procedures. Issued — 10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County Section 7. Discharges to impaired waters, surface waters within an applicable TMDL wasteload allocation, and exceptional waters. (Provide detailed measures for any applicable TMDL) The project drains to an unnamed tributary to Carroll Creek (HUC JR17/H29). A search of the DEQ VEGIS database shows that the receiving waters are listed as impaired for Benthic-Macroinvertebrate Bioassessments (sediment). The DEQ will perform a search during the processing of the registration statement for permit coverage for receiving waters that drain to waters identified as impaired or for which a TMDL wasteload allocation has been established and approved or that are identified as exceptional waters. This information will be provided with the issuance of the notice of coverage letter. In addition, the Chesapeake Bay Watershed TMDL applies to this project which results in enhanced requirements. Discharges of stormwater from construction activities to surface waters identified as impaired in the 2012 § 305(b)/303(d) Water Quality Assessment Integrated Report or for which a TMDL wasteload allocation has been established and approved prior to the term of the general permit for (i) sediment or a sediment -related parameter (i.e., total suspended solids or turbidity) or (ii) nutrients (i.e., nitrogen or phosphorus) are not eligible for coverage under the general permit unless the operator develops, implements, and maintains a SWPPP that minimizes the pollutants of concern and, when applicable, is consistent with the assumptions and requirements of the approved TMDL wasteload allocations. In addition, the operator shall implement the following items: a. The impaired water(s), approved TMDL(s), and pollutant(s) of concern, when applicable, shall be identified in the SWPPP; b. Permanent or temporary soil stabilization shall be applied to denuded areas within seven days after final grade is reached on any portion of the site; c. Nutrients shall be applied in accordance with manufacturer's recommendations or an approved nutrient management plan and shall not be applied during rainfall events; and d. The applicable SWPPP inspection requirements specified in Part II F 2 (of the CGP) shall be amended as follows as per Part I B 4 of the CGP: (1) Inspections shall be conducted at a frequency of (i) at least once every four business days or (ii) at least once every five business days and no later than 48 hours following a measurable storm event. In the event that a measurable storm event occurs when there are more than 48 hours between business days, the inspection shall be conducted on the next business day; and (2) Representative inspections used by utility line installation, pipeline construction, or other similar linear construction activities shall inspect all outfalls discharging to surface waters identified as impaired or for which a TMDL wasteload allocation has been established and approved prior to the term of the general permit. Issued — 10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County Section 8. Qualified Personnel The following personnel are responsible for inspections; (Provide the name, telephone number, and qualifications of the qualified personnel conducting inspections.) Inspections will be performed by qualified personnel identified by the operator in the SWPPP. The operator is responsible for insuring that qualified personnel conduct the inspection. Qualified personnel means a person knowledgeable in the principles and practices of erosion and sediment and stormwater management controls who possesses the skills to assess conditions at the construction site for the operator that could impact stormwater quality and quantity and to assess the effectiveness of any sediment and erosion control measures or stormwater management facilities selected to control the quality and quantity of stormwater discharges from the construction activity. The name, phone number, and qualifications of the qualified personnel conducting inspections required by the CGP will be provided either on the inspection forms for the project or provided separately in the SWPPP. Reports summarizing each inspection shall be incorporated by reference and retained as part of this SWPPP. A copy of an example inspection report is provided in Section 12 of this SWPPP. Issued — 10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County Section 9. Signed Certification (Provide certification according to 9VAC25-870-370. For purposes of plan review and approvals, this certification should be the owner of the property, the same signature as appears on the bonds and applications. Another operator can be designated on the delegation of authority form to follow.) CERTIFICATION "I certify under penalty of law that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system, or those persons directly responsible for gathering the information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations." Owner/Operator Name: Company: Title: Signature: Date: Issued — 10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County Section 10. Delegation of Authority (Provide the persons or positions with authority to sign inspection reports or to modify the stormwater pollution prevention plan. A formal, signed delegation of authority is needed.) DELEGATION OF AUTHORITY I, (name), hereby designate the person or specifically described position below to be a duly authorized representative for the purpose of overseeing compliance with environmental requirements, including the Construction General Permit, at the construction site. The designee is authorized to sign any reports, stormwater pollution prevention plans and all other documents required by the permit. (name of person or position) (company) (address) (city, state, zip) (phone) By signing this authorization, I confirm that I meet the requirements to make such a designation as set forth in the Construction General Permit (CGP), and that the designee above meets the definition of a "duly authorized representative". Operator Name: Company: Title: Signature: Date: Issued — 10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County Section 11. General Permit Copy (Provide a copy of the construction general permit, 9VAC25-880) A copy of the VPDES Construction General Permit (CGP) is provided in Section 11 of this SWPPP. Issued — 10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County Section 12. Inspection Logs (Provide templates for your inspections. Requirements are listed in 9VAC25-880-70, Part II, section B and F.) Reports summarizing each inspection shall be incorporated by reference and retained as part of this SWPPP. A copy of an example inspection report is provided in Section 12 of this SWPPP. Inspection Schedule Inspections shall be conducted at a frequency of (check one box below for project inspection frequency): ❑ (1) At least once every four (4) business days or ❑ (2) At least once every five business days and no later than 48 hours following a measurable storm event. In the event that a measurable storm event occurs when there are more than 48 hours between business days, the inspection shall be conducted on the next business day; and • Representative inspections used by utility line installation, pipeline construction, or other similar linear construction activities shall inspect all outfalls discharging to surface waters identified as impaired or for which a TMDL wasteload allocation has been established and approved prior to the term of the general permit. Representative inspections may be utilized for utility line installation, pipeline construction, or other similar linear construction activities provided that: (1) Temporary or permanent soil stabilization has been installed and vehicle access may compromise the temporary or permanent soil stabilization and potentially cause additional land disturbance increasing the potential for erosion; (2) Inspections occur on the same frequency as other construction activities; (3) Control measures are inspected along the construction site 0.25 miles above and below each access point (i.e., where a roadway, undisturbed right-of-way, or other similar feature intersects the construction activity and access does not compromise temporary or permanent soil stabilization); and (4) Inspection locations are provided in the report required by Part II F (of the CGP). Where areas have been temporarily stabilized or land -disturbing activities will be suspended due to continuous frozen ground conditions and stormwater discharges are unlikely, the inspection frequency may be reduced to once per month. If weather conditions (such as above freezing temperatures or rain or snow events) make discharges likely, the operator shall immediately resume the regular inspection frequency. Issued — 10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County Inspection Requirements As part of the inspection, the qualified personnel shall: (1) Record the date and time of the inspection and when applicable the date and rainfall amount of the last measurable storm event; (2) Record the information and a description of any discharges occurring at the time of the inspection; (3) Record any land -disturbing activities that have occurred outside of the approved erosion and sediment control plan; (4) Inspect the following for installation in accordance with the approved erosion and sediment control plan, identification of any maintenance needs, and evaluation of effectiveness in minimizing sediment discharge, including whether the control has been inappropriately or incorrectly used: (a) All perimeter erosion and sediment controls, such as silt fence; (b) Soil stockpiles, when applicable, and borrow areas for stabilization or sediment trapping measures; (c) Completed earthen structures, such as dams, dikes, ditches, and diversions for stabilization; (d) Cut and fill slopes; (e) Sediment basins and traps, sediment barriers, and other measures installed to control sediment discharge from stormwater; (f) Temporary or permanent channel, flume, or other slope drain structures installed to convey concentrated runoff down cut and fill slopes;(g) Storm inlets that have been made operational to ensure that sediment laden stormwater does not enter without first being filtered or similarly treated; and (h) Construction vehicle access routes that intersect or access paved roads for minimizing sediment tracking; (5) Inspect areas that have reached final grade or that will remain dormant for more than 14 days for initiation of stabilization activities; (6) Inspect areas that have reached final grade or that will remain dormant for more than 14 days for completion of stabilization activities within seven days of reaching grade or stopping work; (7) Inspect for evidence that the approved erosion and sediment control plan, "agreement in lieu of a plan," or erosion and sediment control plan prepared in accordance with department -approved annual standards and specifications has not been properly implemented. This includes but is not limited to: Issued — 10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County (a) Concentrated flows of stormwater in conveyances such as rills, rivulets or channels that have not been filtered, settled, or similarly treated prior to discharge , or evidence thereof; (b) Sediment laden or turbid flows of stormwater that have not been filtered or settled to remove sediments prior to discharge; (c) Sediment deposition in areas that drain to unprotected stormwater inlets or catch basins that discharge to surface waters. Inlets and catch basins with failing sediments controls due to improper installation, lack of maintenance, or inadequate design are considered unprotected; (d) Sediment deposition on any property (including public and private streets) outside of the construction activity covered by the general permit; (e) Required stabilization has not been initiated or completed on portions of the site; (f) Sediment basins without adequate wet or dry storage volume or sediment basins that allow the discharge of stormwater from below the surface of the wet storage portion of the basin; (g) Sediment traps without adequate wet or dry storage or sediment traps that allow the discharge of stormwater from below the surface of the wet storage portion of the trap; and (h) Land disturbance outside of the approved area to be disturbed; (8) Inspect pollutant generating activities identified in the pollution prevention plan for the proper implementation, maintenance and effectiveness of the procedures and practices; (9) Identify any pollutant generating activities not identified in the pollution prevention plan; and (10) Identify and document the presence of any evidence of the discharge of pollutants prohibited by the general permit. Inspection Report Each inspection report shall include the following items: a. The date and time of the inspection and when applicable, the date and rainfall amount of the last measurable storm event; b. Summarized findings of the inspection; c. The location(s) of prohibited discharges; d. The location(s) of control measures that require maintenance; e. The location(s) of control measures that failed to operate as designed or proved inadequate or inappropriate for a particular location; Issued — 10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County f. The location(s) where any evidence identified under Part II F 3 a (7) (of the CGP) exists; g. The location(s) where any additional control measure is needed that did not exist at the time of inspection; h. A list of corrective actions required (including any changes to the SWPPP that are necessary) as a result of the inspection or to maintain permit compliance; i. Documentation of any corrective actions required from a previous inspection that have not been implemented; and j. The date and signature of the qualified personnel and the operator or its duly authorized representative. The inspection report and any actions taken in accordance with Part II (of the CGP) must be retained by the operator as part of the SWPPP for at least three years from the date that general permit coverage expires or is terminated. The inspection report shall identify any incidents of noncompliance. Where an inspection report does not identify any incidents of noncompliance, the report shall contain a certification that the construction activity is in compliance with the SWPPP and the general permit. The report shall be signed in accordance with Part III K of the general permit. Rainfall Tracking For the purposes of tracking measurable rain events, the operator will reference a rain gauge accessible to inspection staff at the project site or at another local site representative of the project location. A blank precipitation log is provided (in Section 12 of this SWPPP) if an onsite rain gauge will be used. If a rain gauge is not used, rainfall tracking will be monitored through either an onsite rain gauge or using one of the following links: o http://water.weather.goy/precip o http://www.nc-climate.ncsu.edu/cronos/ o http://www.ncdc.noaa.gov/cdo-web/ Reports summarizing each inspection shall be incorporated by reference and retained as part of this SWPPP. Corrective Action Personnel Responsible for Corrective Actions • The operator shall implement the corrective action(s) identified as a result of an inspection as soon as practicable but no later than seven days after discovery or a longer period as approved by the VSMP authority. If approval of a corrective action Issued — 10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County by a regulatory authority (e.g., VSMP authority, VESCP authority, or the department) is necessary, additional control measures shall be implemented to minimize pollutants in stormwater discharges until such approvals can be obtained. The operator may be required to remove accumulated sediment deposits located outside of the construction activity covered by this general permit as soon as practicable in order to minimize environmental impacts. The operator shall notify the VSMP authority and the department as well as obtain all applicable federal, state, and local authorizations, approvals, and permits prior to the removal of sediments accumulated in surface waters including wetlands. • The contractor shall be responsible for the installation and maintenance of all erosion and sediment control practices and for corrective actions. Corrective Action Forms • A copy of an example corrective action log is provided in Appendix E of this SWPPP. • Corrective actions may be documented using the corrective action log provided in Appendix E or included within the inspection reports for the project. Copies of the inspection reports are hereby incorporated by reference as part of this SWPPP and are provided in Section 12 of this SWPPP. Issued — 10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County Precipitation Log Date Time Rainfall (to nearest hundredth) DEQ SAMPLEVSMP AUTHORITY CONSTRUCTION GENERAL PERMIT SITE INSPECTION CHECKLIST (All section references bellow are to the Construction GP 9VAC25-880-70 effective 7/1/14) Project Name: Project Address: Project Operator: Operator Address: Inspector Name: Permit Number: County/City: Operator Telephone: County/City: ZIP: Inspection Date: Time: Yes No I N/A Recommended Corrective Action/ Notes 1 Copy of notice of coverage letter posted near main entrance: Part II(C) 2 Information for public access to electronic format or hard copy of SWPPP posted near main entrance: Part II(D)3 3 Copy of complete SWPPP available onsite for operators: Part II(A) 3a Signed copy of registration statement: Part II(A)1.a 3b Copy of permit: Part II A 1.b 3c Copy of notice of coverage letter: Part II(A)1.c 3d Narrative description of the nature of construction activity: Part II A 1.d 3e Legible site plan: Part II(A)1.e Approved ESC plan, "agreement in lieu of a plan", or ESC plan 3f developed in accordance with department approved annual standards andspecifications: Part II(A)2 Approved SWM plan or SWM plan developed in accordance with 3g department approved annual standards and specifications: PartIlA3 3h Pollution prevention plan: Part II(A)4 3i Requirements for discharges to impaired waters, surface waters with an applicable TMDL, exceptional waters if applicable): Part II(A)5 3� Contact information for qualified personnel conducting inspections: PartIIA6 3k SWPPP signed in accordance with Part III K: Part II(A)8 4 SWPPP is being amended, modified and updated: Part II(B) 4a SWPPP clearly identifies the contractor(s) that will implement and maintain each control measure identified in SWPPP: Part II(B)3 4b Record of dates when major grading activities occurred: Part II B 4.a 1 4c SWPPP amendments, modifications, or updates signed in accordance with Part III K: Part II(B)5 5 SWPPP inspections carried out: Part II(F) 5a I Inspections conducted at required frequency: Part II(F)2 5b Inspection reports summarize findings of inspections including corrective actions: Part II F 4.a-i Inspection reports have date and signature of qualified personnel 5c conducting inspections and the operator or authorized representative: Part II F 4.' 5d Inspection reports retained as part of SWPPP: Part II(F)4 6 Erosion and sediment controls implemented: Part II(A)2.c 6a Volume and velocity of stormwater runoff controlled within site to minimize erosion: Part II A 2.c 1 Stormwater discharges, including peak flow rates and total 6b stormwater volume controlled to minimize erosion at outlets and to minimize downstream channel and stream bank erosion: PartIlA2.c2 6c Soil exposed during construction activity minimized: Part II(A)2.c(3) 6d Disturbance of steep slopes minimized: Part II(A)2.c(4) Natural buffers around surface waters provided and maintained, 6e stormwater directed to vegetated areas to increase sediment removal, and maximizes stormwater infiltration: Part II A 2.c 6 6f Soil compaction minimized and topsoil preserved: Part II(A)2.c(7) Sample VSMP Authority Construction Inspection Checklist Page 1 of 4 Stabilization of disturbed areas initiated immediately whenever any clearing, grading, or excavating, or other land -disturbing activities 6g have permanently ceased on any portion of the site, or temporarily ceased on any portion of the site and will not resume for more than 14 days: Part II A 2.c 8 Outlet structures utilized that withdraw stormwater from the surface 6h when discharging from sediment basins or sediment traps: PartllA2.CJ 7 Pollution prevention plan implemented: Part II(A)4 Prevent and respond to leaks, spills and other releases including (i) 7a procedures for expeditiously stopping, containing, and cleaning up spills, leaks, and other releases; and (ii) procedures for reporting leaks, spills, and other releases: Part II A 4.e 1 Prevent discharge of spilled and leaked fuels and chemicals from vehicle fueling and maintenance activities (e.g. providing 7b secondary containment such as spill berms, decks, spill containment pallets, providing cover where appropriate, and having spill kits readily available): Part II A 4.e 2 Prevent discharge of soaps, solvents, detergents, and wash water from construction materials, including the clean-up of stucco, paint, form release oils, and curing compounds (e.g., providing (i) cover 7c (e.g., plastic sheeting or temporary roofs) to prevent contact with stormwater; (ii) collection and proper disposal in a manner to prevent contact with stormwater; and (iii) a similarly effective means designed to prevent discharge of these pollutants): Part II A 4.e 3 Minimize discharge of pollutants from vehicle and equipment washing, wheel wash water and other types of washing (e.g., 7d locating activities away from surface waters and stormwater inlets or conveyance and directing wash waters to sediment basins or traps, using filtration devices such as filter bags or sand filters or usinq similarly effective controls): Part II A 4.e 4 Direct concrete wash water into a leak -proof container or leak -proof settling basin that is designed so that no overflows can occur due to inadequate sizing or precipitation. Hardened concrete wastes 7e shall be removed and disposed of in a manner consistent with the handling of other construction wastes. Liquid concrete wastes shall be removed and disposed of in a manner consistent with the handling of other construction wash waters and shall not be discharged to surface waters: Part II A 4.e 5 Minimize discharge of pollutants from storage, handling, and disposal of construction products, materials and wastes including (i) building products such as asphalt sealants, copper flashing, roofing materials, adhesives, concrete admixtures; (ii) pesticides, 7f herbicides, insecticides, fertilizers, and landscape materials; and (iii) construction and domestic wastes such as packaging materials, scrap construction materials, masonry products, timber, pipe and electrical cuttings, plastics, styrofoam, concrete, and other trash or building materials: Part II A 4.e 6 7 g Prevent discharge of fuels, oils, and other petroleum products, hazardous or toxic wastes, and sanitary wastes: Part II A 4.e 7 7h Address any other discharge from the potential pollutant -generating activities not addressed above: Part II A 4.e 8 8 Appears to be impact(s) to receiving waters: Part I(B)6, Part I(D), or Part II A 2c 2 or 5 : Provide locations & description of im acts . Sample VSMP Authority Construction Inspection Checklist Page 2 of 4 SAMPLEVSMP CONSTRUCTION GP SITE INSPECTION CHECKLIST Project Name: Project Address: Inspector Name: Pre -Construction Conference Clearing & Grubbing Rough Grading Inspection Date: STAGE OF CONSTRUCTION P Building Construction Finish Grading U Final Stabilization Permit Number: County/City: Time: Construction of SWM Facilities Maintenance of SWM Facilities Other. # State Regulation(') Description and Location of condition observedtzl, Recommended Corrective Actions, and Other Comments Initial Repeat (1) Refers to applicable regulation found in the most recent publication of the Virginia Erosion and Sediment Control Regulations (9VAC25-840), the General Permit for Discharges of Stormwater from Construction Activities (9VAC25-880), or the Virginia Stormwater Management Program Regulations (9VAC25-870). (2) Note whether or not off -site impacts resulting from the condition observed was evident during the inspection. Recommended Corrective Action Deadline: Targeted Re -inspection Date: +/- 2 weeks The recommended corrective action deadline date applies to all conditions noted on this report unless otherwise noted. If listed condition(s) currently constitute non-compliance and/or corrective actions are not completed by the deadline, other enforcement actions may be issued to the entity responsible for ensuring compliance on the above project. Inspector: Signature Report e-mailed to Date Sample VSMP Authority Construction Inspection Checklist Page 3 of 4 SAMPLEVSMP CONSTRUCTION GENERAL PERMIT SITE INSPECTION CHECKLIST Photo documentation Sample VSMP Authority Construction Inspection Checklist Page 4 of 4 Appendix A Log of Changes and Updates to SWPPP THIS SECTION IS PROVIDED FOR ANY UPDATES TO THE SWPPP NECESSARY BASED ON CHANGES TO THE PROJECT » § \ 9 \ • a 7 0 5' c m 2 «-0 i/7/ 02 EE(n(D LC)- R\ CD 90 \ / � (n (n « 2 CD / CD 0 7 / 2 I� o E § 7C o ® / c: 7 tr \ %2 \¥ / m29J o /� \ #7 0 c o ° _ �/ 7�CD � =E �o 0 Cl) u \ ± \ % / / » \ w & \ § » 000 \ e k G o 0 £0 ] J] \ \ 2 / $ \ / U cn � � 2 m 2 m / \ D \ � S � I O § O � Appendix B Grading and Stabilization Activities Log »2 \/ Q 2 /\ \d � C / � \ $ 0 \ R w \ f. 7 0 / � § % /� kf \\ § < § 2 \ 0 o\ CD )kkk CD \�E> 5 k R , � K 44� \ \CD �k7 & 9 k E n � A 7 � / / � / � t7' 2 Appendix C Maintenance Agreements for Stormwater Management Facilities Appendix D Spill Report Form Spill Report Project Name: Date/Time of Spill: Location: Material Type and Volume: Cause of Spill: Corrective Action Taken: Agencies/Persons Contacted: I certify under penalty of law that I have read and understand this document and that this document and all attachments were prepared in accordance with a system designed to assure that qualified personnel properly gathered and evaluated the information submitted. Based on my inquiry of the person or persons who manage the system, or those persons directly responsible for gathering the information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations. Name: Signature: Title: Appendix E Corrective Action Log A O d 0 n z d CD o• A O b n 'Cf N O C CD W C � O �z °CD �CD �CD �d o y n ,r W, Appendix F Contractor/Subcontractor Certifications/Agreements Appendix G Additional Supporting Information Minimum Measure Construction Site Stormwater Runoff Control Subcategory Good Housekeeping/Materials Management Description of Concrete Washout at Construction Sites Concrete and its ingredients Concrete is a mixture of cement, water, and aggregate material. Portland cement is made by heating a mixture of limestone and clay containing oxides of calcium, aluminum, silicon and other metals in a kiln and then pulverizing the resulting clinker. The fine aggregate particles are usually sand. Coarse aggregate is generally gravel or crushed stone. When cement is mixed with water, a chemical reaction called hydration occurs, which produces glue that binds the aggregates together to make concrete. Concrete washout After concrete is poured at a construction site, the chutes of ready mixed concrete trucks and hoppers of concrete pump trucks must be washed out to remove the remaining concrete before it hardens. Equipment such as wheelbarrows and hand tools also need to be washed down. At the end of each work day, the drums of concrete trucks must be washed out. This is customarily done at the ready mixed batch plants, which are usually off -site facilities, however large or rural construction projects may have on -site batch plants. Cementitious (having the properties of cement) washwater and solids also come from using such construction materials as mortar, plaster, stucco, and grout. Environmental and Human Health Impacts Z Construction workers should handle wet concrete and washout water with care because it may cause skin irritation and eye damage. If the wastewater is dumped on the ground (Fig. 1), it can run off the construction site to adjoining roads and enter roadside storm drains, which discharge to surface waters such as rivers, lakes, or estuaries. The red arrow in Figure 2 points to a ready mixed truck chute that's being washed out into a roll -off bin, which isn't watertight. Leaking washwater, shown in the foreground, will likely follow similar Figure t. Chute wastewater being dumped an the ground Figure 2. Chute washwater leaking Irom a roll -off bin being used as a washout container paths to nearby surface waters. Rainfall may cause concrete washout containers that are uncovered to overflow and also transport the washwater to surface waters. Rainwater polluted with concrete washwater can percolate down through the soil and alter the soil chemistry, inhibit plant growth, and contaminate the groundwater. Its high pH can increase the toxicity of other substances in the surface waters and soils. Figures 1 and 2 illustrate the need for better washout management practices. Best Management Practice Objectives Concrete washout water (or washwater) is a slurry containing The best management practice objectives for concrete washout toxic metals. It's also caustic and corrosive, having a pH are to (a) collect and retain all the concrete washout water and near 12. In comparison, ❑rand liquid drain cleaner has a pH solids in leak proof containers, so that this caustic material of 13.5. Caustic washwater can harm fish gills and eyes and does not reach the soil surface and then migrate to surface interfere with reproduction. The safe pig ranges for aquatic life waters or into the ground water, and (b) recycle 100 percent habitats are 6.5 — 9 for freshwater and 6.5 — &5 for saltwater. of the collected concrete washout water and solids. Another objective is to support the diversion of recyclable materials from landfills. Table 1 shows how concrete washout materials can be recycled and reused. Table 1-- Recycling concrete washout materials Concrete Washout Materials Uses of Recycled Materials Reused to washout additional mixer truck chutes or drums_ Reused as a ready mixed concrete ingredient Reused as an ingredient of precast concrete products, e.g., highway barriers, retaining wail blacks, riprap Reused as crushed concrete products, e.g., road base or fill Reused to pave the yards of ready mixed concrete plants d N E N U [3 CC! � � x x xb x C-7 k,v�_� x x x x x x x x x X x Returned back to a surface water, x` J� e.g., river, lake, or estuary a. Fine particles of cementitious material (e.g.. Portland cement, slag cement, fly ash, silica fume) b. Recyclable, if allowed by the concrete quality specifications c, Treated to reduce the pH and remove metals, so it can be delivered to a municipal wastewater treatment piant, where it is treated further and then returned to a natural surface water Washwater recycling, treatment disposal Washwater from concrete truck chutes, hand mixers, or other equipment can be passed through a system of weirs or filters to remove solids and then be reused to wash down more chutes and equipment at the construction site or as an ingredient for making additional concrete. A three chamber washout filter is shown in Figure 3. The first stage collects the coarse aggregate. The middle stage filters out the Figure 3. Concrete washout small grit and sand. The third stage frlter has an array of tablets that filter out fines and reduces the pH. The filtered washwater is then discharged through a filter sock. An alternative is to pump the washout water out of the washout container (Fig 4) and treat the washwater off site to remove metals and reduce its pH, so it can be delivered to a publicly owned treatment works (POTW), also known as a municipal wastewater treatment plant, which provides additional treatment allowing the washwater to be discharged to a surface water. The POTW should be contacted to inquire about any pretreatment requirements, i.e., the National Pretreatment Standards for Prohibited Dischargers (40CFR 403.5) before discharging the washwater to the POTW. The washwater can also be retained in the washout Figure 4. Vacuuming washwaterout of washout container for treatment and reuse container and allowed to evaporate, leaving only the hardened cementitious solids to be recycled. Solids recycling The course aggregate materials that are washed off concrete truck chutes into a washout container can be either separated by a screen and placed in aggregate bins to be reused at the construction site or returned to the ready mixed plant and washed into a reclaimer (Fig. 5). When washed out into a reclaimer, the fine and course aggregates are separated out and placed in different piles or bins to be reused in making fresh concrete. Reclaimers with settling tanks separate cement fines from the washwater, and these fines can also be used in new concrete unless prohibited by the user's concrete quality specifications. 4.2. r Figure 5. Heady mixed truck washing out into a reclaimer Hardened concrete recycling When the washwater in a construction site concrete washout container has been removed or allowed to evaporate, the hardened concrete that remains can be crushed (Fig. 6) and reused as a construction material. It makes an excellent aggregate for road base and can be used as fill at the construction site or delivered to a recyceer. Concrete recyclers can be found at municipal solid waste disposal facilities, private Figure s. Crushed concrete stockpile and recycling plants, or large crusher construction sites. 2 Wet concrete recycling Builders often order a little more ready mixed concrete than they actually need, so it is common for concrete trucks to have wet concrete remaining in their drum after a delivery. This unused concrete can be returned to the ready mixed plant and either (1) used to pour precast concrete products (e.g., highway barriers, retaining wail blocks, riprap), (2) used to pave the ready mixed plant's yard, (3) washed into a reclaimer, or (4) dumped on an impervious surface and allowed to harden, so it can be crushed and recycled as aggregate. Unused wet concrete should not be dumped on bare ground to harden at construction sites because this can contribute to ground water and surface water contamination. Washout Containers Different types of washout containers are available for collecting, retaining, and recycling the washwater and solids from washing down mixed truck chutes and pump truck hoppers at construction sites. Chute washout box A chute washout box is mounted on the back of the ready mixed truck. If the truck has three chutes, the following procedure is used to perform the washout from the top down: (1) after the pour is completed, the driver attaches the extension chute to the washout box, (2) the driver then rotates the main chute over the extension chute (Fig, 7) and washes down the hopper first then the main chute, (3) finally the driver washes down the flop down chute and last the extension chute hanging on the box. All washwater and solids are captured in the box. Figure 7. Chute washout box After the wash down, washwater and solids are driver then washes down the chute into the bucket to remove any cementitious material before it hardens. After washing out the chute, the driver pumps (yellow arrow points to the pump) the washwater, sand, and other fine solids from the bucket up into the truck's drum to be returned to the Figure 8. Chute washout bucket and PUMP ready mixed plant, where it can be washed into a reclaimer. A removable screen at the bottom of the washout bucket prevents course aggregate from entering the pump. This course aggregate can also be returned to the plant and added to the coarse aggregate pile to be reused. All the materials are recycled. Hay bale and plastic washout pit A washout pit made with hay bales and a plastic lining is shown in Figure 9. Such pits can be dug into the ground or built above grade. The plastic lining should be free of tears or holes that would allow the washwater to escape (Fig. 10). After the pit is used to wash down the chutes of multiple ready mixed trucks and the washwater has evaporated or has been vacuumed off, the remaining hardened solids can be broken up and removed from [he pit. This process may damage the hay bales and plastic lining. If damage occurs, the pit will need to be repaired and relined with new plastic. When the hardened solids are removed, they may be bound up with the plastic lining and have to be sent to a landfill, rather than recycled. Recyclers usually accept only unmixed material. If the pit is going to be emptied and repaired more than a few times, the hay bales and plastic returned to the ready mixed will be generating additional solid waste. Ready mixed concrete plant for recycling. A filter basket near the top of the washout box separates out the coarse aggregates so they can be placed in a bin for reuse either at the construction site or back at the cement plant. Chute washout bucket and pump After delivering ready mixed concrete and scraping the last of the customer's concrete down the chute, the driver hangs a washout bucket shown in Figure 8 (see red arrow) on the end of the truck's chute and secures the hose to insure no leaks. The bate and plastic Figure 10. Leaking washout pit that has not been well maintained trucks can use hay bale washout pits, but concrete pump trucks have a low Banging hopper in the back that may prevent their being washed out into bale -lined pits. Vinyl washout container The vinyl washout container (Fig. 11) is portable, reusable, and easier to install than a hay bale washout pit. Figure 11. Vinyl washautpit with filter bag The biodegradable filter bag (Fig. 1 2) assists in extracting the concrete solids and prolongs the life of the vinyl container. When the bag is lifted, the water is filtered out and the remaining concrete solids and the bag can be disposed of together in a landfill, or the hardened concrete can be delivered to a recycler. After the solids have been removed several times and the container is full of wastewater, the washwater can be allowed to evaporate, so the container can be reused. The wastewater can be removed more quickly by placing another filter bag in the container and spreading water gelling granules evenly across the water. In about five minutes, the water in the filter bag will turn into a gel that can be removed with the bag. Then the gel and filter Haag can be disposed to together. Metal washout container Figure 12. Extracting the concrete solids or gelled washwater The metal roll -off bin (Fig. 13) is designed to securely contain concrete washwater and solids and is portable and reusable. It also has a ramp that allows concrete pump trucks to wash out their hoppers (Fig. 14). Roll -off providers offer recycling services, such as, picking up the roll -off bins after the washwater has evaporated and the solids have hardened, replacing them with empty washout bins, and delivering the hardened concrete to a recycler (Fig. 16), rather than a landfill. Some providers will vacuum off the washwater, treat it to remove metals and reduce the pH, deliver it to a wastewater treatment plant for additional treatment and Figure 13. Mixer truck being washed out into a roll -off bin subsequent discharge to a surface water. Everything is recycled or treated sufficiently to be returned to a natural surface water. Figure 14. Pump truck using the ramp to wash oul into a roll -off bin Figure 15. Del hardened hardened Concrete + to a recycler Another metal, portable, washout container, which has a rain cover to prevent overflowing, is shown in Figure 16. It is accompanied by an onsite washwater treatment unit, which reduces the pH and uses a forced weir tank system to remove the coarse aggregate, fine aggregate, and cement fines washwater can then he reused at the construction site to wash out other mixer truck chutes and equipment. The solids are II dt h d The Figure 16. Washout container with a rain cover and onsite washwater treatment a awe o ar en together and can - be taken to a concrete , recycler (Fig. 17) to be ' crushed and used as road base or aggregate for making precast - x products, such as retaining wall blocks. All Figure 17. Delivering hardened concrete materials are recycled. to a recycler Sitina Washout Facilities Concrete washout facilities, such as washout pits and vinyl or metal washout containers, should be placed in locations that provide convenient access to concrete trucks, preferably near the area where concrete is being poured. However they 4 should not be placed within 50 feet of storm drains, open ditches, or waterbodies. Appropriate gravel or rock should cover approaches to concrete washout facilities when they are located on undeveloped property. On large sites with extensive concrete work, washouts should be placed at multiple locations for ease of use by ready mixed truck drivers. If the washout facility is not within view from the pour location, signage will be needed to direct the truck drivers. Reference NRMCA 2009. Environmental Management in the Ready Mixed Concrete Industry, 2PEMRM, 1st edition. By Gary M. Mullins. Silver Springs, MD: National Ready Mixed Concrete Association. Websites and Videos Construction Materials Recycling Association Operating and Inspecting Washout Facilities www.concreterecycling.org Concrete washout facilities should be inspected daily and after heavy rains to check for leaks, identify any plastic linings and sidewalls have been damaged by construction activities, and determine whether they have been filled to over 75 percent capacity. When the washout container is filled to over 75 percent of its capacity, the washwater should be vacuumed off or allowed to evaporate to avoid overflows. Then when the remaining cementitious solids have hardened, they should be removed and recycled. Damages to the container should be repaired promptly. Before heavy rains, the washout container's liquid level should be lowered or the container should be covered to avoid an overflow during the rain storm. Educatina Concrete Subcontractors The construction site superintendent should make ready mixed truck drivers aware of washout facility locations and be watchful for improper dumping of cementitious material. In addition, concrete washout requirements should be included in contracts with concrete delivery companies. National Ready Mixed Concrete Association www.nrmca.org National Ready Mixed Concrete Research and Education Foundation www.rmc-foundation.org Additional information and videos on concrete washout containers and systems can be found by a web search for "concrete washout." Photograph Credits Figures 1, 2, Mark Jenkins, Concrete Washout Systems, Inc. Figure 3. Mark Shaw, Ultra Tech International, Inc. Figure 4. Mark Jenkins, Concrete Washout Systems, Inc. Figure 5. Christopher Crouch, CCI Consulting Figure 6. William Turley, Construction Materials Recycling Association Figure 7. Brad Burke, Innovative Concrete Solutions, LLC Figure S. Ron Lankester, Enviroguard Figures 9, 10. Mark Jenkins, Concrete Washout Systems, Inc. Figures 11, 12. Tom Card, RTC Supply Figures 13, 14, 15. Mark Jenkins, Concrete Washout Systems, Inc. Figures 16, 17. Rick Abney Sr., Waste Crete Systems, LLP Disclaimer Please note that EPA has provided external links because they provide additional information that may be useful or interesting. EPA cannot attest to the accuracy of non -EPA information provided by these third -party websites and does not endorse any non -government organizations or their products or services. 5