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Home My WebLink AboutWPO201900014 Plan - VSMP WPO VSMP 2019-06-07Erosion and Sediment Control Narrative For: FOOTHILL FARM 753 ROCKY HOLLOW RD. TM 62 PARCEL 71 ALBEMARLE COUNTY, VA HUC: Rivanno River - Meadow Creek 020802040401 LAT: 38' 03' 15"N LONG: 78' 24' 47"W Project Description: The proposed work involves the construction of a new residence, driveway and associated site grading required to create a new building pad for the house and to create open pasture. The property is located on the north side of Rocky Hollow Rd., about 0.25 mile east of Stony point Rd. The total area of the parcel is 187.32 acres. The total on -site disturbed area is approximately 3.79 acres. Work is anticipated to begin in Spring of 2019. Erosion control measures shown will protect the stream and property below from receiving silt -laden runoff. Existing Site Conditions: The project site area is in a mix open pasture and fully wooded hill side and generally slopes to the north at 10 to 25%. The pre and post drainage patterns will be nearly the some, with about 0.41 acres shifting from a 638 acre drainage area to a 160 acre drainage area. Adjacent Property: The property is surrounded by other large acreage parcels and wooded areas as well as small rural single-family lots. Off -site Areas: No off -site areas will be involved in this project. Soils: 2313-Davidson clay loam, 0.28 K-Factor, Group B soil 71 B-Rabun clay loam, 0.24 K-Factor, Group B soil 71 C-Rabun clay loam, 0.24 K-Factor, Group B soil 71 D-Rabun clay loam, 0.24 K-Factor, Group B soil Critical Erosion Areas There are no critical erosion areas in the project area Soil Stockpiles: A temporary soil stockpile will be utilized during the excavation to preserve topsoil for final grading around the house and driveway. Erosion and Sediment Control Measures: Unless otherwise indicated, all vegetative and structural erosion and sediment control practices will be constructed and maintained according to minimum standards and specifications of the Virginia Erosion and Sediment Control Handbook. Additional measures may be required during construction by the Erosion Control Inspector, as needed. Structural Practices: Construction Entrance: (CE) 3.02 (To be installed where construction site traffic exits the project area, to remove soil fi•oni tires prior to travel on public roads. The contractor shall clean and maintain the travelway as required to keep soil from washing into unprotected areas and to provide a safe surface for pedestrian and vehicular access. The Construction Entrance will be located at an existing cattel guard about 0.4 miles from the public right of way. Once the building is erected, all adjacent areas will be stabilized and the construction entrance will no longer be necessary.) Silt Fence: (SF) 3.05 Silt fence (wire -supported) shall be constructed along the lower limit of graded areas. (To be installed as shown on the plan, down -gradient of disturbed areas created by the proposed work, and above the proposed excavation to prevent up -gradient runoff from crossing disturbed areas. } Culvert Inlet Protection: (CIP) 3.08 A sediment filter located at the inlet to storm sewer culverts which prevents sediment from entering, accumulating in, and being transferred by the culvert. It also provides erosion control at culverts during the phase of a project where elevations and drainage patterns are changing, causing original control measures to be ineffective. (To be installed at culvert inlets inanaediately rafter installation) Outlet Protection (OP) 3.18 The installation of riprap channel sections storm drain outlets to reduce erosion and under -cutting from scouring at outlets and to reduce flow velocities before stormwater enters receiving channels below these outlets. (To be installed rat the new culverts. ❑ Rock Check Dam: (CD.) 8.20 Small temporary stone dams constructed across a drainage ditch to reduce the velocity of concentrated flows, reducing erosion of the swale or ditch. Limited to use in small open channels which drain 10 acres or less; should not be used in live streams. (To be installed along the natural swcales on either side of the grading area to minimize runoff velocity.) Level Spreader (LS) 3.21 An outlet for dikes and diversions consisting of an excavated depression constructed at zero grade across a slope to convert concentrated, sediment free runoff to sheet flow and release it into areas of undisturbed soil which is stabilized by e.ldsting vegetation. (To be installed at the end of'the roof'drains to disperse concentrated runoff.) Permanent Seeding (PS) 3.32 Establishment of perennial vegetative cover by planting seed where permanent, long-lived vegetative cover is needed on fine -graded areas. (Permanent seeding will be provided on all disturbed areas designated to be landscaped on the site plan within 7 days of final grading.) Mulching (MU) 3.85 Application of plant residues to disturbed surfaces to prevent erosion and reduce overland flow. Apply to all seeded areas. Refer to Table 3.35-A on Sheet C-3.3 for application rates. (To be installed along with Permanent Seeding) Blanketing/Matting (B/M) 3.36 Installation of soil stabilization matting on a prepared planting of a steep slope. (To be installed along driveway ditch where shown on the plans.) Dust Control (DC) 3.39 Reducing surface and air movement of dust during land disturbance, demolition or construction activities in areas subject to dust problems in order to prevent soil loss and reduce the presence of potentially airborne substances. (To be installers, if required by the County, where disturbed soil is to remain unprotected for an extended period. ) Vegetative Practices Temporary Seeding 3.31: All areas disturbed by construction that will not be brought to final grade for a period of more than 14 days, will be stabilized by establishing a good stand of grass. Lime 3.31: Unless it is known that the site will remain undisturbed for many months, lime is not necessary. If necessary, the amount will be determined by Soil Test, or 3 tons per acre of pulverized agricultural limestone, uniformly applied to surface to be seeded during seedbed preparation and incorporated into the top 2-4 inches of soil. Fertilizer 3.31: 600 pounds per acre of 10-20-10 or equivalent, uniformly applied to the surface to be seeded during seedbed preparation and incorporated into the top 2-4 inches of soil. Surface roughening 3.31: Where disturbed soils have been compacted, loosen soils by discing, raking, or whatever acceptable means available to receive seed. Seed 3.31: Seed shall be broadcast evenly and planted from 34 to 1h inch deep. Seasonal seed selection shall be as follows: • Sept. 1 - Feb. 15: 50/50 Mix of Annual Rye and Winter Rye, 50-100 Ib/ac. • Feb. 16 - April 30: use Annual Rye, 60-100 Ib/ac. • May 1 - Aug. 31: use German Millet, 50 Ib/ac. Areas which fail to establish vegetative cover adequate to prevent rill erosion will be reseeded as soon as such areas are identified. Management Strategies: Construction should be sequenced so that grading operations can begin and end as quickly as possible. Areas that are not to be disturbed shall be clearly marked by the placement of the erosion control measures prior to construction. The job superintendent shall be responsible for the installation and maintenance of all erosion and sediment measures. Where construction vehicle access routes intersect paved public roads, provisions shall be made to minimize the transport of sediment by vehicular tracking onto the paved surface. Where sediment is transported onto a public road surface, the road shall be cleaned thoroughly at the end of each day. Sediment shall be removed from the roads by shoveling or sweeping and transported to a sediment control disposal area. Street washing shall be allowed only after sediment is removed in this manner. Stabilization of Denuded Areas and Soil Stockpiles: Permanent or temporary soil stabilization must be applied to denuded areas within 7 days after final grade is reached on any portion of the site. Temporary soil stabilization shall be applied within 7 days to denuded areas which may not be at final grade but will remain dormant (undisturbed) for longer than 14 days. Permanent stabilization shall be applied to areas that are to be left dormant for more than one year. Soil stabilization refers to measures that protect soil from the erosive forces of raindrop impact and flowing water. Applicable practices include vegetative establishment, mulching and the early application of gravel base on areas to be paved. Soil stabilization measures should be selected to be appropriate for the time of year, site conditions and estimated duration of use. Timing and Stabilization of Sediment Trapping Measures: Sediment barriers 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. Stabilization measures shall be applied to earthen structures such as dams, dikes, and diversions immediately after installation. Disposal of Temporary Measures: All temporary erosion and sediment control measures shall be removed within 30 days after final site stabilization or after the temporary measures are no longer needed, unless otherwise authorized by the local program administrator. Trapped sediment and the disturbed soil areas resulting from the disposition of temporary measures shall be removed and replaced with suitably compacted soils, or, where applicable, permanently stabilized to prevent further erosion and sedimentation. Maintenance: All erosion and sediment control structures and systems shall be maintained, inspected, and repaired weekly and after each significant rainfall or as aneeded to insure continued performance of their intended function. Any dammage to structural measures shall be repaired immediately. Silt fence shall be inspected after every rainfall event and at least daily during prolionged rainfall, as well as at the end of every working day, with any necessary repairs made immediately. Accumulated sediment shall be removed and disposqd °.of as it becomes necessary, or when deposits have accumulated to cane -half of the above ground fence height. All undercutting or erosion shall be repaired immediately. the contractor shall follow all manufacturers recommendations for installation, maintenance, replacement, and repair. damages caused by construction traffic or other activity must be repaired before the end of each working day. All seeded areas are to be checked to insure a good stand is maintained. General construction notes for Erosion and Sediment Control olans 1. 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. 2. All erosion and sediment control measures will be constructed and maintained according to minimum standards and specifications of the Virginia Erosion and Sediment Control Handbook and Virginia Regulations VR 625-02-00 Erosion and Sediment Control Regulations. 3. All erosion and sediment control measures are to be placed prior to or as the first step in clearing. 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 limited to, off -site borrow or waste areas), the contractor shall submit a supplementary erosion control plan to 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 erosion and sedimentation as determined by the plan approving authority. 7. All disturbed areas are to drain to approved sediment control measures at all times during land disturbing activities and during site development until final stabilization is achieved. 8. During dewatering operations, water will be pumped into an approved filtering device. 9. The contractor shall inspect all erosion control measures periodically and after each runoff producing rainfall event. Any necessary repairs or cleanup to maintain the effectiveness of the erosion control devices shall be made immediately. 10. All fill material to be taken from an approved, designated borrow area. 11. All waste materials shall be taken to an approved waste area. Earth fill shalll be inert materials only, free of roots, stumps, wood, rubbish, and other debris. 12. Borrow, fill or waste activity involving industrial -type power equipment shall be (limited to the hours of 7:00am to 9:00pm. 13. Borrow, fill or waste activity shall be conducted in a safe manner than maintains lateral support, or order to minimize any hazard to persons, physical darnage to adjacent land and improvements, and damage to any public street because o slides, sinking, or collapse. 14. Temporary stabilization shall be temporary seeding and mulching. Seeding is to be at 75lbs/acre, and in the months of September to February to consist a 50/50 mix of Annual Ryegrass and Cereal Winter Rye, or in March and April to consist of Annual Rye, or May through August to consist of German Millet. Straw mulch is to be applied at 80lbs/100sf. Alternatives are subject to approved by the erosion control inspector. 15. Permanent stabilization shall be lime and fertilizer, permanent seeding, and mulch. Agricultural grade limestone shall be applied at 90lbs/1000sf, incorporated into the top 4-6 inches of soil. Fertilizer shall be applied at 1000lbs/acre and consist of a 10-20-10 nutrient mix. Permanent seeding shall be applied at 180lbs/acre and consist of 95% Kentucky 31 or Tall Fescue and 0-5% Perennial Ryegrass or Kentucky Bluegrass. Straw mulch is to be applied at 80lbs/100sf. Alternatives are subject to approved by the County erosion control inspector. Foothill Farm 16. Maintenance: All measures are to be inspected weekly and after each rainfall. Any damage or clogging to structural measures is to be repair immediately. Silt traps are to be cleaned when 50% of the wet storage volume is filled with sediment. All seeded areas are to be reseeded when necessary to achieve a good stand of grass. Silt fence and diversion dykes which are collecting sediment to half their height must be cleaned and repaired immediately. 17. All temporary erosion and sediment control measures are to be removed within 15 days of final site stabilization, when measures are no longer needed, subject to approval by the County erosion control inspector. 18. Permanent vegetation shall be installed on all denuded areas within nine (9) months after the date the land disturbing activity commenced. MINIMUM STANDARDS MS-1 Permanent or temporary soil stabilization must be applied to denuded areas within seven days after final grade is reached on any portion of the site. Temporary soil stabilization shall be applied within seven days to denuded areas that may not be at final grade but will remain dormant (undisturbed) for longer than 15 days. Permanent stabilization shall be applied to areas that are to be left dormant for more than one year. Soil stabilization refers to measures which protect soil from the erosive forces of raindrop impact and flowing water. Applicable practices include vegetative establishment, mulching, and the early application of gravel base on areas to be paved. Soil stabillization measures should be selected to be appropriate for the time of year, site conditions and estimated duration of use. MS-2 During construction of the project, soil stockpiles and borrow areas shall be stabilized or protected with sediment trapping measures. The applicant is responsible for the temporary protection and permanent stabilization of all soil stockpiles on site as well as borrow areas and soil intentionally transported from the project site. MS-3 A permanent vegetative cover shall be established on denuded areas not otherwise permanently stabilized. Permanent vegetation shall not be considered established until a ground cover is achieved that, is uniform, mature enough to survive and will inhibit erosion. MS-4 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 plasce. MS-5 Stabilization measures shall be applied to earthen structures such as dams, dikes, traps, basins and diversions immediately after installation. MS-6 Surface runoff from disturbed areas that is comprised of flow from drainage areas greater than or equal to three acres shall be controlled by a sediment basin. The sediment basin shall be designed and constructed to accommodate the anticipated sediment loading from the land disturbing activity. The outfall device or system design shall take into account the total drainage area flowing through the disturbed area to be served by the basin. MS-7 Cut and fill slopes shall be constructed in a manner that will minimize erosion. Slopes that are found to be eroding excessively within one year of permanent stabilization shall be provided with additional slope stabilizing measures until the problem is corrected. MS-8 Concentrated runoff shall not flow down cut or fill slopes unless contained within an adequate temporary or permanent channel, flume, or slope drain structure. MS-9 Whenever water seeps from a slope face, adequate drainage or other protection shall be provided. MS-10 All storm sewer iinlets that are made operable during construction shall be protected so that; sediment -laden water cannot enter the conveyance system without first being filtered or otherwise treated to remove sediment. MS-11 Before newly constructed stormwater conveyance channels are made operational, adequate; outlet protection and any required temporary or permanent channel liming shall be installed in both the conveyance channel and receiving channel. MS-12 through 15 - Ne>t applicable, no live watercourses. MS-16 Underground tutility lines shall be installed in accordance with the applicable criteria: a standards iin addition to other a 'c following a. No more than 5010 linear feet of trench may be opened at one time. b. Excavated material shall be placed on the uphill side of trenches. c. Effluent from dewratering operations shall be filtered or passed through an approved sediment trapping device, or both, and discharged in a manner that does not adversely affect flowing streams or off -site property. d. Restabilization shall be accomplished in accordance with these regulations. e. Applicable safety iregulations shall be complied with. MS-17 Where construction vehicle access routes intersect paved public roads, provisions shall be rmade to minimize the transport of sediment by vehicular tracking onto the paved surface. Where sediment is transported onto a public road surface, the road shall be cleaned thoroughly every four hours. Sediment shall be removed from the roads by shoveling or sweeping and transported to a sediment control disposal area. Street washing shall be allowed only after sediment is removed in this manner. MS-18 All temporary erosion and sediment control measures shall be removed within 30 days after final site stabilization or after the temporary measures are no longer needed, unless otherwise authorized by the local program administrator. Trapped sediment and the disturbed soil areas resulting from the disposition of temporary measures shall be permanently stabilized to prevent further erosion and sedimentation. MS-19 Drainage Area A is 160 acres. The increase in impervious area is less than 1 % of the total watershed area. (9VAC25-870-66 C-3-a). Drainage Area B is 638 acres and slightly B is reduced in size by 0.4 acres. Concentrated flows at the driveway ditch and roof drains are routed to level spreaders to create sheetflow condition. The increase in impervious area is less than 1 % of the total watershed area. (9VAC25-870-66 C-3-a). VICINITY MAP SCALE: 1 "=2,000 FT. GENERAL EROSION AND SEDIMENT CONTROL NOTES ES-1: UNLESS OTHERWISE INDICATED, ALL VEGETATIVE AND STRUCTURAL EROSION AND SEDIMENT CONTROL PRACTICES WILL BE CONSTRUCTED AND MAINTAINED ACCORDING TO MINIMUM STANDARDS AND SPECIFICATIONS OF THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK AND VIRGINIA REGULATIONS VR 625-02-00 EROSION AND SEDIMENT CONTROL REGULATIONS. ES-2: 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. ES-3: ALL EROSION AND SEDIMENT CONTTROL MEASURES ARE TO BE PLACED PRIOR TO OR AS THE FIRST STEP IN CLEARING. ES-4: A COPY OF THE APPROVED EROSIION AND SEDIMENT CONTROL PLAN SHALL BE MAINTAINED ON THE SITE AT ALL TIMES. ES-5: PRIOR TO COMMENCING LAND DISTURBING ACTIVITIES IN AREAS OTHER THAN INDICATED ON THESE PLANS (INCLUDING, BUT NOT LIMITED TO, OFF -SITE BORROW OR WASTE AREAS), THE CONTRACTOR 'SHALL SUBMIT A SUPPLEMENTARY EROSION CONTROL PLAN TO THE OWNER FOR REVIEW AND APPROVAL BY THE PLAN APPROVING AUTHORITY. ES-6: THE CONTRACTOR IS RESPONSIBLE FOR INSTALLATION OF ANY ADDITIONAL EROSION CONTROL MEASURES NECESSARY TO PREVENT EROSION AND SEDIMENTATION AS DETERMINED 13Y THE PLAN APPROVING AUTHORITY. ES-7: ALL DISTURBED AREAS ARE TO DRAIN TO APPROVED SEDIMENT CONTROL MEASURES AT ALL TIMES DURING LAND DISTURBING ACTIVITIES AND DURING SITE DEVELOPMENT UNTIL FINAL STABILIZATION IS ACHIEVED. ES-8: DURING DEWATERING OPERATIONS, WATER WILL BE PUMPED INTO AN APPROVED FILTERING DEVICE. ES-9: THE CONTRACTOR SHALL INSPECT ALL EROSION CONTROL MEASURES PERIODICALLY AND AFTER EACH RUNOFF-PROQUCING RAINFALL EVENT. ANY NECESSARY REPAIRS OR CLEANUP TO MAINTAIN THE EFFECTIVENESS OF THE EROSION CONTROL DEVICES SHALL BE MADE IMMEDIATELY. THE RLD IS RESPONSIBLE FOR ONGOING MAINTENANCE AND OPERATION OF THE E&SC PLAN. FOR THE PURPOSES OF PLAN SUBMITTAL, REVIEW AND APPROVAL, THE RLD IS B. CLARK GATHRIGHT, P.E. SEQUENCE OF CONSTRUCTION 1. Install Construction Entrance and Phase 1 silt fence and check dam where shown on the plan. 2. Excavate and grade areas per the phasing sequences shown, while placing and compacting fill in the proposed house site area. Utilize e previously excavated phasing area excavated topsoil to cover the p y p g and provide permanent seeding measures to stabilize newly graded surfaces as the excavation phasing progresses up the hill. 3. If the site will remain dormant for more than 15 days, provide temporary seeding measures to stabilize the surface. 4. When building construction is complete, completely distribute the temporary topsoil stockpile as necessary to complete final grading. 5. Apply mulching and permanent seeding on all permanently stabilized areas. 6. Remove silt fence and check dams after all disturbed areas are stabilized, with County Inspector approval. 1 NAMORMINNERM SITE Q S ITE DATA: OWNER/DEVELOPER: TOBIAS A & LYNN T DENGEL TRUST 540 PARK ST. CHARLOTTESVILLE, VA 22902 LOCATION: 753 ROCKY HOLLOW RD. TM 62 PARCEL 71 ALBEMARLE COUNTY, VA MAGISTERIAL DISTRICT: RIVANNA PLAN PREPARED BY: B. CLARK GATHRIGHT, P.E. 100 1OTH ST NE SUITE 200 CHARLOTTESVILLE, VA 22902 TOTAL SITE AREA: 187.32 ZONING: RA DATUM REFERENCE FOR ELEVATION: NAVD88 SOURCE OF TOPOGRAPHY: ROGER W. RAY & ASSOC.,INC. - NOV. 12, 2018 NEW RESIDENCE AND DRIVEWAY SETBACKS: FRONT: 75 FT. SIDE: 25 FT. REAR: 35 FT. DISTURBED AREA: 3.79 ACRES EXISTING IMPERVIOUS SURFACE: 1.33 ACRES NEW IMPERVIOUS SURFACE: 0.64 ACRES WATER QUANTITY: LESS THAN 1 % OF THE TOTAL WATERSHED (9VAC25-870-66 C-3-A) INCREASE IN SHEETFLOW VOLUME WILL NOT CAUSE OR CONTRIBUTE TO EROSION, SEDIMENTATION, OR FLOODING OF DOWN GRADIENT (9VAC25-870-66 D) WATER QUALITY: 1.42 LB./YR NUTRIENT CREDIT PURCHASE CRITICAL SLOPES: NO CRITICAL SLOPES IN THE PROJECT AREA. TIMING OF CONSTRUCTION: SPRING 2019 VIRGINIA OUTDOORS FOUNDATION EASEMENT 1 T-1.0 TITLE SHEET & EROSION AND SEDIMENT CONTROL NARRATIVE 2 C-1.0 OVERAL PROPERTY PLAN - EXISTING CONDITIONS & SWM PLAN 3 C-1.1 DRIVEWAY EROSION AND SEDIMENT CONTROL PLAN 4 C-1.2 HOUSE -SITE EROSION AND SEDIMENT CONTROL PLAN 5 C-1.3 EROSION AND SEDIMENT CONTROL DETAILS 6 C-1.4 HOUSE -SITE DRAINAGE AREAS 7 C-1.5 WATER QUALITY CALCULATIONS APP�(IV E1) CN CD �--�CN (1) ®� -� > LU ry Op C) B. LARK UATHPIGHT Lic. No. 036305 � r� c � S_ 1p SfONAL LL1 I- < CY- �--- 1- t� 0 .-.� 0 LJLJ Lu 10-11. LL"` _5 I,- LIJ .1■■ c� LL �- REVISIONS: 05-01-19 05-31-19 DATE: 02-21-19 DRAWING NUMBER: T-1 ou SHEET 1 OF 7 I I -/ / - \ r " r . 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' 62-71 // / `/. \i\� l` �j I i 1 �/ / % / / j' ( ` 1l , % \;!► \ L ` �" -/( / / % / `/ ,' r , ` , / / ' > / \✓ `'��C _ / � J ` l`/ �`' it ` tt I t� DA A ' /' ' '' — -- - _ -'� ' \ — _ j I — I l \ j , \`` -, \ _ ` ! I I ( f j ` - / , \, /( \ ' - ; i \ ` _ / t V ~_ - - -- - - _ ATT&T FIBER OPTIC LINE i ,+ / / ' '"I / \ I 1 j\ { J / __ - - / / I ,� \ = l CAI` _ / / /` I x / \ i\ I \ y I 1 ! / / / - \.,\ \d !FXISTIN DRIVEWAY i - r ~ / j / .. ` _ 1 — - — — i ' \ \ /' - J l r� ( J 1 ( I / / DA A DAB 1y /�'; �/ �/ (� '. / / / / / _ / 2 l � l - , , ` �' _ - _ _ - / j 1 / 1 (�(� I / 1 �O -SITE / _ / / — \ \ ' \-71 B5 I, ) _ — `\ / ,- —_ \ 4 \ I ( r J,� l 1'' / f — ; 1� , , f,/ ;,'�� l . 1 ,/ ( / / 't , � � CRITICAL SLOPES L ` — — `� ` \ _ \ - - \ ji ` `• \ / i' f j ( f ` / -�./ 6' /' � ` `/',� 1 / /' j'y ,� ! '' �`1 {PER COUNTY GIS) - - - \ \• \ \ ` /" \\ I., - / / / 2 l / // 1 I .' fr /r :1 ' 'I .'1/'// // / / / / \ \ ` V,l ' / ,( 1 "/ ,/ (/ 1 _- \ / _ ' ". \ r / \ � - / I l 1 / / / f 1 , i ? - PROPOSED DRIVEWAY PLAN / " t 1, � ' �' l = _ > \�e /` \ _ ' l / _ ( / ; SEE SHEET C-1.1 / / / \ 1 ' / �' �/i k' ' (/'1' r ` I, 6 1�A _ \ / ;' ti i - e%r \• -r-6z�= 1$ �•,\ \ _ '' - - / 100 FT. STREAM BUFFER \ ( / / f'- . -' / r' / i "` /r� I, ' i / ( ( X ~ ` \ \ '' �/\ x \'` / / \ I \' N / " / -- - - ' '� \ \ ` \` ' / _ r - _ _ - _ j ` \_ _ f. \ _ ! \� 1/' I I t, j y 1 l I I \/ , I,// .\ . \/ \ ,- % / ' � - - . \ � j'- — -- __ - t - i \ 62-74� _ / - — _ -""l' \ ^J _ 11 /f (,1 +/ I i —�""" " \ \ /1' ; `K\ \ � �, �/� ,'\ \ / / r `'f - ' '_/I / , I_-' - / \�( , \" I/'I-I "�. -/ -'- .//, / .'/_,I/ t '"/,/// -\. / '/ " /I >-/- " /I // . / -I'// -II./I -/'" I/,. , I� , "_ I/ II`/-. , /I' ./�'.,%�,'_, ''11 ./�� \ \ r 62-738 \ ' � \ \ \ / '� �„ '�-�' `` \ / ' } /i } //j (' l I \ / i - - \ / l } j I j INCREASE IN \ / r \, \ \ \ / \ /' // I' l ,'POST DEVELOPMENT I t + — Yt %` > / `</ /\ ,r 4 \ \ \ I j \ \ DRAINAGE AREA A: \\ / ¢ ,/ i "i.?\I1")/xI "II * '.- (11 I -I %. \ �I, x%0"_/_0.0I �ja0/L- � ' /I )' / /.I ) 0IZ�'/z� /',_-0/L'u,/l 0- __0_/'-'/ . .I / /- , 1I/ ./0I /. _- /0II 0- I-I1"0-_1-//0) I -,'-o- -Io.,/__—/ �/_---_- 1-;.� _-I _- Z 0'-�--.' -/ -_\0/1,__0<�__ ' 0- _-' -I. - _I ,_I' _-- - _-. _ I-, -) / , 1_-� ,-- .'i1 //_--'.-__1/-. -,__ '(4._1_4- 1" - -0I �\_ - o_z_1.o1 '-,eI _-_,I_\I —`- " I_/ _I _ _/1_j '...6"1.-. I' _-- I4l `_•.- \ 1 1 `, �\ . J ;/�' >. 1 / ' / ' / I `� \ ;1' \ 1 \ \ \ \\ '� 0.11 ACRES ,', /j r \ -�4 f; / " / _ ` ' ' i ,I. -, /.I 'I-- � 7.' '_ _I/ _I �_�K_ - _' '-_ \,,I' ' -j\ \ /1" "'I1/ I\.I, _/_*- I/ *_ __I1.. _-\/_/_I \"I__.I1\� '/ //7' ,.\ ,""-"_,�y%\" \"Ift"/. 1_I/ /-%"I'-,-�1/-\'I ,lII\I _l-\6� _/ I-I'-N�I\_'.�2.,,__,, z _ I_ 1__—), I \-\ \,-.- ,-,- _-� - I- \7-, \ __\ . - _.- -'\ \ �, J\ - t .'.. _ ` j - S'r - y !/: / �' 1 1"?`lL,,'' '' \/'l" 'I� PROPOSED HOUSE SITE ./' �> ;11/ ,'\:� '/ //,i /' ! - ' 1\ \ r < / \/ ` /� /, '�' - T� { �' / 1 SEE SHEET C-1.1 #� /`\ , /'\ x' a (/' i i/ i' i =4 r-' - - -/ __ \ / f' r/'/ // ' i i T - / \/' ' \ /�i' /i` /% /' i / _ _./� / i ;_.\ .. / ' I-,- t \ \� ./' '\ ;`� .' / /' I' !'J /' .1'-,,\-' _( \_�\ \ \ il""''w ! / - __ _ ;.z� -rl!� y ;/ i� �' �'i �''�`'i./'/' /' %' �� < l.:/'�,/1/C ,1`:` \ \. 1 , <` s ,</\/.'\/\ \ / j 'j / 1 �.,�„ ...-�- \ -�""� - ` -,,r am--�/ !, `rt / kk / , l ; /i ` // ` �, / " ,1 \ l : � ,\ ;� t \ ' ` "� I l -- - \ 1 / / � 62-76A / POINT OF ANALYSIS 1 62--MAj ,�,- -__�- _ -� / �_ _-- --;<, � ,', ( / / /' / ( �' \ r �,'/ '� �' ;\ /� , / A t , � /A / � / t \ \ \ ' ,w'* ` %, /' 1-'1 1 �; �'" �,/'I 1 ( / \ \ _ /' /\ - 7- /\ \/ t \ DAB 1 / l r \ /_ / ~� / �_ ,r ' /1' /% , \'\ /,( /i" /� ,- T -_ ',` �`\' /� \ \ DA A / \ ,\ 1 1 / \ \ ) / j / I- // r _Y7 ' !( ( /( i \ /� \ / \ �i t/� ( / �� , _�`` \/ , \\ \ '\ /\ \`\ \ \ \ I 1 / % / " i i' / r / / / t �t r ( // / / i' \ /i j / \ / \ y \ i' / /, / /' `�� / _ ` ,/_ / /' \ \ / \i // / \; r / ( / � , i' j'' — ti /' Z r `'�/ \ -/ `x -, \ N\ � z ' / t/' / / /, / " � - 1 `, \ - i - i 1 1'�\S,w\1II"_�, � _/ ./"\,),'_ ,__I�,� ,\ _/ I1I I " ./�IL)"o/ V/,_ I �l, �"1\"--'.I /\ - ,-/ - ( / ({ ///iii ( yr} C �/I j \ f / f / // / / / j / / /, ; ` , / VL-:7.J I /r /' �` / ' / ' / "'' ' /1 ' / ! i '� \ � \ / 1 / l \t/ \ 'i / 'I ( C'' / ,�/' I / r _-C -,, y/ / ( /I` ,/ ,j // /,' -�, -� f ' ' 1 \, / / / 1 i l \ i �`"► ..��' , / / j// / ! - 4' / I)' / ', / , l - (` ,�'// ( .� /' / // ; .1 ./ / I /%,' 1 /' / / / l" fir I \ `\ \ \, \ . _ _ - _ J — r / / ` /` / / I - / / ri ` ( y r > 1 ,( ,"�! fit-Z5C `" /i l''1 , \ // !/ I; j/� L/ /% , ! > ,, / � , , /,/,I;f'� .!!�-\ \\ - - - - - 1 \ \, 4 \ \ \ Tr / fir. i _ i i / , I V \ ,, � t! / ( � / / / i � _ ,,, / / / % / / ' t \ y i 1 1 \\\ \ \ \ / 1 ( 4/' I ;'i l /' /1 I / / - � ' / i / , "/ , / -i - _\ 1 \ \ \\ `\ 1( (� / %' �'7,"i' / ,, 4 , , , / / , , 1' (/, f // /, t (1// / \y/ / -T - .. �_,.; , I✓/ / / J' ; f \ l N\ \ \ ! l y y I I I 1\ / j / *`z \,k /� \ / 1 ' 1/ /I' I,I /r /' ,./, r //' /� % - /, _-T_ _ ,' / / i / 5 I / / I / J _( 1 lam. , �, // ;' , / // / j / / / -/ ? / / f _ - \ \ 1 ,, / I / l j ( i 1 62-7 D * \, 1/' // !/ /, // l/ :/' / 1, / / 4, _ _ j` / \ I / / ( I f \ \ / I I { /' jI / ' is /) I//1 (; / ' /% / ' •✓ .�L '/�,.' i ice/ ,r /// r / 1 ; / f / _ ..\ `\ \ \ \ � x _/ 1 / ,-�- - \ _ i 1 1 I , \ /J'; //l /1' L// ///,r / %, i I f '_ _ --/ / I.\ / / ` I \ \ \ `` / / //� I'% '//%/ ,/'//'//'/,//.''r '/ ,. 'j _ 1 \ `, 1 l / \' / " / / / / / ; , N ' ,/x // // // % ' /i/" j + , / - _ _ _ DRAINAGE DIVIDE - /` /'i f DA A LINETYPE &SYMBOL LEGEND `1 \ \ 1 !�• , �' // /� �.� // A II /' ,/ - -- - _ `�. --- EXISTING CONTOUR LINE - - - - - - SWM NOTES \ \ <'` ( 'r/ / / / i / ' 5'„' !/ '/ ' - _ _ _ — y 1 1 I ( '� 82,:�--8 , / I, r J /' /' /' . - /' // //' ' ' — — - _ � _l DRAINAGE DIVIDE -------------- 1. CONCENTRATED FLOWS AT THE DRIVEWAY DITCH r = . I \ , J �, ' j / ',,' / -' r ARE ROUTED TO LEVEL SPREADERS TO CREATE �, ; % / ' - / ; ! '�' ! ' / , / / / / ` ` /_� PROPERTY BOUNDARY--------- SHEETFLOW CONDITION. \ ; �-/' 1 P l , / l / /j / / /` / / / /' // /�' ,1/ / / f \` \ STREAM 2. DA A — 160.4 AC. ` l (/ / `�' / / �?) ((/ /" `��,/ / / /f / '`, ;,/; ' ; /i\ ' /' \ ' " \ \ STREAM BUFFER — -- — — — — NIET INCREASE OF 0.11 AC. ( ( ( r 1 I / f / i / ,1 �: /%� '' ! ,/ / /, / / /l.f /' / i f ` j `` 1 t \ NET INCREASE OF IMP. AREA: 0.2 AC. .l 1 / (/ / ` �. / / �/ / I J' •� /,' / \, t, `` l l / / 1.,41 AC. DISTURBED AREA ` ( I / / / / / / / / / / f' / / ; / '/ / \ ' \ � I I CRITICAL SLOPES ' , 1 I ( ( J , / mac! ! / /� I // ' /, ' \ \ \ \ r"o/ / ///'/ , 3. D;A B — 638 AC. `� I I 1 II ( � J9' f I ' `,/ ;r / / ,�§3f1.6 / / S'' /,/ \ NET DECREASE OF ix.11 AC, I r f j I I/ ( ` `'' �: / 1� y y I ( / ,1, / r � -,c / / \ ' i\\\ I i NET INCREASE OF IMP. AREA: 0.42 AC. I ` { I I ( I 1 .' / A /'` \ \\ ( 2..37 AC. DISTURBED AREA ,? 1 l } \ 1 1 y 4 ; I ` ( ' I I 1 . �7,X/ / / % / / _ -_ t � \ \ \ \\\\ t \ \ \ ` ( X / C,\• '\ I\ �� 1 ti, `} I\ \ 11 4 I1 � I ( ( Ir / /�, `j, / _ -__ \\ \ \\ '\ 1 \ \ \ , `l-'\ \ i � 'i I 1 1 1 I *, J (( ( I / f ( '�` /- \ \\\ 1 \ Il \ I " OVERALL PROPERTY PLAN -EXISTING CONDITIONS & SWM PLAN TOPO:SOURCE:COUNTYGIS 10'CONTOURINTERVAL r`l I II � � � II I y I I ( ((( I I 1 � ( (/ r r',�1! I�\ \\\ '-, t -1 .0 SCALE: 1" = 200' \ ,� l � t �' � , \ 1 � � v \ 'v \ \ \ , - _1___1 �"��'� , � � � � �' � � � I I I I �_ � \ i" 11 "\ , - __--- 1 I I I I ( I j� I' I T .I ( I , ' I I rl 1 ( ,� 1 � ' _�,,, .' 1 - � __9 --- L_ =3 w co �_5 IT- < . (=) = rn (Z:> o I ,'! I I � F1 op �� ".' �'- , 81 /" /' 1 k.�_� -1 o B, ('-LARK 6ATHRIGHT v Lic. No. 036305 �- ��' �5` i , s:sl01'rAL, z O �__ Mgt z CD I- CD T_ � > � CL a.�(/) C3 Q) <- :E 04 . ! t e i 3� 010L (.. 0 3:: 7- __j '/) E-0 CL!� �_- 12L ui - M , '3: CL Q O ■� � � __j Aw 0 ID 0 � 1L i-- Imo. REVISIONS: 05-01-19 05-31-19 DATE: -- 19 DRAWING NUMBER: c- i *u FEET 2 OF 7 EXISTING HOUSE & DRAINAGE DIVIDE (,r � ~~-- L~ / ~�- ~�~� ` FY|qT|Wr, FARM ROAD 7�1m~ \ � AT&T FIBER OPTIC EASEMENT—\ � 4-7 `�� \ � � �~ �� U� = � 0 ~LLOCATE ��N��UC�DN TENTRA��E AEXISTING CATTLE GUARD | --- --- \ / ''/� EXISTINGDRIVEWAY EROSION & SEDIMENT CONTROL PLAN N STONE CONSTRUCTION ENTRANCE EXISTING GROUND « FILTER CLOTH � 6" MIN.| A g�� |�V�T|/l� `^^`~^- ^-^-"-,'`''~^'` mrMIN. B wAS*n«cw ur /— vnor #u | | `--� POSITIVE DRAINAGE coonsc xssecsArc � / TO SEDIMENT" � rn«ppINu oEvzoc *WuST EXTEND FULL WIDTH / OF |wopsss AND oonsSn PLAN \�|�� opsnm�ow ' �,~.` VIEW '~^~--- — ��`T|�lhJ �—� ��".�.` � '` EXISTING PAVEMENT m1 ~ mpTzom»L> ncINrnncsn cumcxE/E ","" ^,~^" SOURCE: ADAPTED from 1983 Maryland Standards for Soil erosion and 5ediment Goniroi, ana Yo. unt. ST IONE' ' ACCESS TOP 2% `\_~5, �011N', 21A'' eASE STONE N ASP ACCESS SHRACK -51 OF' INCRE'_55 AND EGRESS ' -_/ - FyTEIR SECTION A -A AumilWiomll water tap n±l.bocbinuist u `1. inCkbw0mbck PAVED WASH RACK ALT: PAVED WASH RACK, IF REQUIRED BY COUNTY 'E&SC INSPECTOR �K / / / / ' A x / / 1K�Y0 ' // 04 "°'''"°L SLOPES \PEx Cuum/r wc` Lij � // / zc '/y /� \ / /U~^ LINETypE & SYMBOL LEGEND EXISTING CONTOUR LINE �----�� ---��— —��---- PROPOSED CONTOUR LINE PROPERTY BOUNDARY DRAINAGE DIVIDE —~� --� �--- --- -�— --- ~�-- LIMIT 0FGRADING — — — — — — — ----~--- SOIL TYPE BOUNDARY SOIL TYPE /U[LI �un CONSTRUCTION ENTRANCE 3.02 CONSTRUCTION ROAD STABILIZATION 5.03 SILT FENCE 3D5 ]� AT&T FIBER OPTIC EASEMENT CULVERT 2 12" HDPE CULVERT 24' 0 2% . INV IN:712.0 INV: OUT:711.52 D.A:0.86 AC. 10-YEAR PEAK FLOW:2.05 CFS- LEVEL SPREADER #2 L=13' D.A.:0.85 AC. 1 "/HR INFLOW: 0.29 CFS a SEE SHEET C-1.1 LEVEL SPREADER #3 L=13' D.A.:0.92 AC. r_iHOUSE SITE EROSION & SEDIMENT CONTROL PLAN 21 CONTOUR INTERVAL SCALE:: V - 40' SOURCE OF TOPOGRAPHY: ROGER W. RAY & ASSOC.,INC. - NOV. 12, 2018 SOLID WASTE ROLL -OFF DUMPSTER PORT-A-JOHN LINETYPE & SYMBOL LEGEND EXISTING CONTOUR LINE PROPOSED CONTOUR LINE PROPERTY BOUNDARY - - - - DRAINAGE DIVIDE LIMIT OF GRADING ----------------- SOIL TYPE BOUNDARY SOIL TYPE XXX'iI SWPPP NOTE: THE USE OF CHEMICALS/SOLVENTS IS NOT ANTICIPATED. PAINTS, STAINS AND POLYURETHANE FINISH MATERIALS WILL BE STORED INSIDE THE BUILDING. CONSTRUCTION ENTRANCE 3.02 CONSTRUCTION ROAD STABILIZATION 3.03 �RJ SILT FENCE 3.05 X X CULVERT INLET PROTECTION 3.08 k��P OUTLET PROTECTION 3.18 1 P ROCK CHECK DAM 3.20 LEVEL SPREADER 3.21 LS TEMPORARY SEEDING 3.31 TS PERMANENT SEEDING 3.32 S MULCHING 3.35 SOIL BLANKETS & MATTING 3.36 DUST CONTROL 3.39 LOCATE @ 100 FT. SPACING ALONG DRIVEWAY DITCH CROSS SECTION CONSTRUCTION OF A SILT FENCE (WITH WIRE SUPPORT) _�NWSHOULDER JUTE, OR EXCELSIOR LENGTH: 13' OR EQUIVALENT CLOT IH 2. STAPLE WIRE FENCING TO THE POSTS. 6 STAPLED IN P VARIABLE (MIN. 7') PIPE OUTLET CONDITIONS 1. SET POSTS AND EXCAVATE A 4"X4" 1 0-) TRENCH UPSLOPE ALONG THE LINE 2' BURIED 6" MIN. C�_4 OF POSTS. FILTER CLOTH C%j 111111!1110 BURIED 6" MIN. (OPTIONAL) A A 11 1 < (DOWNSTREAM VIEW) __j LEVEL LIP OF 2:1 OR 61 SPREADER FLATrER (D VDOT #1 24 12 C5 6 ,-*, I COARSE AGGREGATE PEPE OUTLET TO VLAT > AREA WITH NO DEFINED Jill Flow .7 2' LEVEL SPREADER WITH VEGETATED LIP CHANNEL PLAN VIEW _j C/) dso=6" > L aL-= 6 CL. 1 Uj W 2: Uj FLOW 2 CHECKDAMDETAILS 4 LEVELSPREADERDETAIL d=9" I" 4' C_1 0 -1.3 SCALE: NONE .3 SCALE: NONE L. =6' U) 3. ATTACH THE FILTER FABRIC TO THE WIRE 4. BACKFILL AND COMPACT THE T FENCE AND EXTEND IT INTO THE TRENCH. EXCAVATED SOIL. ENDWALL SECTION A -A FILTER CLOTH KEY IN 0"-D"; RECOMMENDED FOR ENTIRE P TER < NOTES: 1. APRON LINING MAY BE REPRAP, GROUTED RIPRAP, GABION BASKET, OR CONCRETE. 2� LEL IS THE LENGTH OF THE RIPRAP APRON AS CALCULATED USING PLATES 3.18-3 AND 3.18-4. 3. d = 1.5 TIMES THE MAXEMUM STONE DIAMETER, BUT NOT LESS THAN 6 INCHES. CULVERT TOE OF FILL Source: Va. DSWC FROM Plate 3.18-1 0 _j 5 OUTLET PROTECTION DETAIL FLOW -1.3 SCALE: NONE NU oil, EXTENSION OF FABRIC AND WIRE INTO THE TRENCH. IH "'LARK CATHRIGHT FILTER FABRIC 0 TOE OF FILL 0 E W1 E IONA L vx� SILT FENCE 0 0 SOURCE: Aduted from Installation of Straw and Fabric Filter Barriers for Sediment Control, Pi .3.05-1 SherwW Tyan L FLOW e-S SILT FENCE DETAILS 3 CULVERT INLET PROTECTION DETAIL 1 3 SCALE: NONE -1.3 SCALE: NONE 1992 332 FATMEN T I TYPIPAL I 1-� 1124 TYPICAL ORIENrP ATION OF TABLE 3 32wC V) 1 111121 MENT I SITE SPECIFIC SEED'ING MIXTURES __j rill n FAT (SOIL SrP ABILIZATION BLANKET) FOR APPALACHIAN/MOUNTAIN AREA (S OIL STABILIZATION BLANKET) INS TA LLA TION CRITERIA Total Lbs. 'Minimum Care Liwn P _Sr Acre A y LU //- SHALLOW ANCHOR SLOT Commercial or Residential 200-250 tbs. C\j SLOPE NOTE CQ Kentucky 31 or Turf -Type Tall Fescue 90-100% APPROXIMATELY 200 STAPLES REQUIRED PER 100 SQ. YDS. OF MATERIAL ROLL. .10% Improved Perennial Ryegrass M < ON S SLOPES, STRIPS OF V ANCHOR SLOTS, JUNCTION SLOTS & > NETTING PROTECTIVE COVERINGS Kentucky Bluegrass 0-10%, CHECK SLOTS TO BE BURIED 6" TO 12". MAY BE APPLIED ACROSS THE SLOPE. I 4 12' MAX. 4:1 OR FLATTER Hieh-Maintenance Lawn 7- 6" MAX. STEEPER THAN 4:1 JUNCTION SLOT > /N11 A01 EDGE AND END JOINTS Minimum of three (3) up to five (5) varieties, TO BE SNUGLY ABUTTED BERM CHECK SLOT of bluegrass from approved list for use in Virginia. 125 lbs. -/ I V 4_j Al/1, gw. (JUTE MESH WILL HAVE I 4-a WHERE THERE IS A BERM AT THE TOP OF THE SLOPE, TAPLED LAP JOINT IN U TERMINAL FOLD S 0 BRING THE MATERIAL OVER THE BERM AND ANCHOR IT LIEU OF EDGE JOINT) General Slor)e 0:1 or less) BEHIND THE BERM. LAP JOINT 2" MIN. (JUTE MESH ONLY) TAMP FIRMLY Kentucky 31 Fescue 128 lbs.. Lij ANCHOR SLOT 5' MAX. 4:1 OR FLATTER Red Top Grass 2 lbs� STEEP 3' MAX. STEEPER THAN 4:1 SLOPE Seasonal Nurse Crop -2-0 —IbS. E 2 150 lbs. 6" TO 12" Low -Maintenance Slope (5tegp�r than 3TI) ON STEE SLOPES, APPLY 0 Ulm Lij PROTECTIVE COVERING PARALLEL TO THE DIRECTION OF FLOW - Kentucky 31 Fescue 108 lb,& ULM 0 AND ANCHOR SECURELY. -91 - Red Top Grass 2 lbs. 0 CHECK SLOT Seasonal Nurse Crop 20 lbs. 1 " TO 2" Crownvetch 20 lbs. 2', [TAM CHECK SLOT FIRMLY - -0 — _1A_ 150 lbs. 1 VAR, VAR. Perennial Ryegrass will germinate faster and at lower soil temperatures than 6" TO 11" M IN, PLAN VIEW 0 (.0 V) 4" 6* TO 12" fescue thereby providing cover and erosion resistance- for seedbed. 0 BRING MATERIAL DOWN TO A LEVEL AREA BEFORE STAPLING DIAGRAM co TERMINATING THE INSTALLATION. TURN THE END UNDER 4" AND STAPLE AT 12" INTERVALS. Use seasonal nurse crop in accordance with seeding dates as stated below� LO CHECK SLOTS AT MIN. 12" STAPLE FORMED FROM NO. 11 STEEL WIRE. 50' C-C INTERVALS; LL LLJ 8" STAPLE MIN. LENGTH FOR SANDY SOIL. NOT REQ.'D WITH ALL 6" STAPLE MIN. LENGTH FOR OTHER SOIL. -COMBINATION"BLANKETS March, April through May 15th ... ................ Annual Rye May 16tb �through August 15th .... ...... . Foxtail. Millet DITCH FLOW JUNCTION SLOT August 16th through September, October .... Annual Rye REVISIONS TAMP TERMINAL FOLD November through February ...... Winter Rye 05-01-19 IN DITCHES, APPLY PROTEC11VE COVERING FIRMLY PARALLEL TO THE DIRECTION OF FLOW. 12" -TAMP FIRMLY 4' MIN, 05-31-19 USE CHECK SLOTS AS REQUIRED. AVOID 2" 4" JOINING MATERIAL IN THE CENTER OF 2" If Flatpea is used, increase to 30 lbs./acre. All legume seed must be properly I / I I I I I I I I I I f I THE DITCH IF AT ALL POSSIBLE. T inoculated, Weeping Lovegrass may also be included la any slope or low- 2% 0 12" — SLOPE Ixtu maintenance mi re during warmer seeding periods, add 10-20 tbs/acre in mixes. DATE: !§0URCE: ADAPTED FROM LUDLOW PRODUCTS BROCHURE PLATE: 3.36-1 - SOURCE: VDOT ROAD AND BRIDGE STANDARD PLATE: 3.36-2 Ill -302 ri_-�TYP. DITCH PROFILE 02-21-19 6 SOIL STABILIZATION BLANKET (B/M) DETAILS 7 TABLE 3.32-C DRAVVING NUMBER: �C-1.3) SCALE: NONE -1 .3 SCALE: NONE C-1 *3 SHEET 5 OF 7 CULVERT 2 37333 SF 0,86 AC. LOCATION S.F. AC. C CA I M P AREAS 2320 0.05 0.9 0.05 PERM PAVER 0.00 0.3 0.00 OTHER 35013 0.80 0.3 0.24 0.86 029 Cpost= 0,34 t= 5 min. STORM 1 (in/hr) A C Q (cfs) 10 7.1 0.86 0,34 2.05 CULVERT 3 LOCATION 40051 SIF S.F. 0.92 AC. AC. C CA IMP AREAS 4688 0A 1 0.9 0.10 PERM PAVER 0.00 0.3 0.00 OTHER 35363 0.81 0.3 0.24 0.92 034 cpost,= 0.37 t= 5 min. STORM i (in/hr) A C Q (cfs) 10 7.1 0.92 037 2.42 Ditch @ culvert 2 Lt Side Slope: 3.00:1 (H:V) Rt Side Slope: 3.00:1 (H:V) Manning's n: 0.030 Channel Slope: 0.1150 ft/ft Depth: 0.36 ft Discharge: 2.05 cfs Culvert 2 Diameter: 1.00 ft Slope: 0.0200 ft/ft Manning's n: 0.011 Discharge: 2.05 cf,s Depth- 0.40 ft Full Capacity: 5.95 cfs TP Load Reduction Required (lb/yr) Final Post -Development TN Load Pre Re Develop men t TN Load (lb/yr) 18,6. (Post-ReDevelopment & New impervious) (lb/yr) * - LOAD REDUCTION MET BY 1.27 LB/YR NUTRIENT CREDIT PURCHASE Velocity: 5.20fps Flow Area: 0.39sf Flow Top Width: 2.18 ft Wetted Perimeter: 2.29 9 ft Critical Depth: 0.49 ft Critical Slope: 0.0225 ft/f Velocity: 6.88 fps Flow Area: 0.30.sf Critical Slope: 0.0050 ft/ft Critical Depth: 0.61 ft Percent Full: 40.47%, QMAX @.94D: 6.41 cfs LEVEL SPREADER 1 1305 SF 0.03 AC. LOCATION S.F. AC. C CA IMP AREAS 280 0.01 0,9 0.01 GRAVEL 0.00 0.7 0.00 OTHER 1025 0.02 0.3 0.01 0,03 0.01 Cpre= 0.43 t= 5 min. STORM i (in/hr) A C Q (cfs) 1.0 0.03 0.43 0.01 LEVEL SPREADER 2 37333 SF 0.86 AC. LOCATION S.F. AC. C CA IMP AREAS 2320 0.05 0.9 0.05 PERM PAVER 0.00 0.3 0.00 OTHER 35013 0.80 0.3 0.24 0.86 0.29 cpost= 0.34 t= 5 min. STORM i (in/hr) A C 0 (cfs) 1.0 0.86 034 0.29 LEVEL SPREADER 3 40051 SF 0.92 AC. LOCATION S.F. AC. C CA IMP AREAS 4688 0.11 0.9 0.10 PERM PAVER 0.00 0.3 0.00 OTHER 35363 0.81 0.3 0.24 0.92 0.34 Cposf= 0.37 t= 5 min. STORM i (in/hr) A C 0 (cfs) 1.0 0.92 0.37 0.34 Ditch @ culvert 3 Lt Side Slope: 3.00:1 (H*V) Rt Side Slope: 3.00:1 (H:V) Manning's n: 0.030 Channel Slope: 0.1150 ft/ft Depth: 0.39 ft Discharge: 2.42 cfs Culvert 3 Diameter: 1.00 ft Slope: 0.0200 ft/ft Manning's n: 0.011 Discharge: -2.4,2 cfs Depth.: 0.44 ft Full Capacity: 5.95 cfs Velocity: 5.42 fps Flow Area: 0.45 sf Flow. Top Width: 2.32,ft Wetted Perimeter: 2.44 ft Critical Depth: 0.53 ft Critical Slope: 0.02,20ft/ft Velocity: 7.19 fps Flow Area: 0.34 sf Critical Slope: 0.0054 ft/ft Critical Depth: 0.67 ft Percent Full: 44.38 % QMAX @.94D: 6.41 cfs