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HomeMy WebLinkAboutWPO201300070 Plan - Approved 2013-11-19Erosion and Sediment Control Narrative For: Independence Tasting Room T.M. 103 Parcel 43K Carters Mountain Rd. Scottsville, Virginia Project Description: The proposed work includes the construction of a new building for wine - tasting and excavation and grading as required to provide The total area of the parcel is 64 acres of parking and a septic system. p , which 0.27 acres will be impervious surface. The total on -site disturbed area is approximately 1.37 acres Work is anticipated to begin upon approval of the erosion and sediment control plan. Work will include clearing, grubbing and grading, as shown on the plans. Erosion control measures shown will protect the stream below from receiving silt -laden runoff. Existing Site Conditions: The site is currently undeveloped with the exception of an existing driveway. The site generally slopes from the center of the property to the northwest at a slope generally varying between 15 -20%. The pre and post drainage patterns will be about the same. There are no existing drainage or erosion problems directly associated with this site. The proposed work will reduce the site grades. Steeper slopes may be created where exposed rock can provide stability. Adjacent Property: The site is located on the southeast side of Carters Mountain Road, between Blenheim Rd and Rolling Rd. The property is bounded on all sides by large, undeveloped properties with steep, wooded terrain. Runoff o Quarry Creek on the subject. The proposed from the site discharges int Q ry � p p erosion and sediment control measures will eliminate potential for erosive damage to private properties. Since the site is not openly exposed to winds, and the limited amount of site work, dust control should not be an issue. Off -site Areas: Excavated soil will be removed from the site. Unless directed otherwise by the contractor and approved by the Owner and County, all surplus excavated soils and demolition waste shall be properly disposed of in a state approved landfill. Soils: 59D- Myersville very stony silt loam Critical Erosion Areas: There are no critical erosion areas. 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 City Erosion Control Official, as needed. Structural Practices: Construction Entrance; (CE) 3.02 An existing paved area where two pressure washers will be stationed for wheel wash -off. (To be installed where traffic site trcc exits the existing driveway, to remove soil from 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.) 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 at the base of'the slopes created by the proposed excavation. ) 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 new culvert inlets.) Diversion Dike: (DD) 3.09 A ridge of compacted soil constructed to divert sediment laden runoff to a sediment trapping structure. (To be installed along the base of fill slope to divert runoff to sediment trapping structure.) Temporary Right of -W-ay- Diversion: (RWD) 3.11 A ridge of loose gravel constructed across a disturbed right if way (To be installed in driveway to divert runoff to sediment trapping structures.) 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 at the new culverts.) Rock Check Dam: (CD) 3.20 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 ditches to minimize runoff velocity.) Temporary Seeding (TS) 3.31 Establishment of temporary vegetative cover on disturbed areas by seeding with appropriate rapid growing plants. (Temporary seeding will be provided on all disturbed areas that will not be brought to final grade within 30 days) 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) Mulching (MU) 3.35 Application of plant residues to disturbed surfaces to prevent erosion and reduce overland flow. Apply to all seeded areas. (To be installed along with Permanent Seeding) Soil Stabilization Matting (B /M). 3.36 Installation of soil stabilization mat (Treatment 1) on a prepared planting of a steep slope or channel. (Tobeinstalled graded slopes and ditches not otherwise protected by existing rock slopes.) Tree Protection (TP) 3.38 Protection of desirable trees from mechanical and other injury during land disturbing and construction activity. (To be installed where grading and equipment could impact and scar trees that are to remain.) 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 installed, if required by the County, where disturbed soil is to remain unprotected for can 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 30 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 % to M inch deep. Seasonal seed selection shall be as follows: • Sept. 1 - Feb. 15: 50/50 Mix of Annual Rye and Winter Rye, 50 -100 lb/ac. • Feb. 16 - April 30: use Annual Rye, 60 -100 lb/ac. • May 1 - Aug. 31: use German Millet, 50 lb/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 30 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. I"rapped 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 needed to insure continued performance of their intended function. Any damage to structural measures shall be repaired immediately. Silt traps are to be cleared at 50% storage capacity level. All seeded areas are to be checked to insure a good stand is maintained. General construction notes for Erosion and Sediment Control plans 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 shall be inert materials only, free of roots, stumps, wood, rubbish, and other debris. 12. Borrow or waste areas are to be reclaimed within 7 days of completion per Zoning Ordinance section 5.1.28. 13. All inert materials shall be transported in compliance with section 13 -301 of the Code of Albemarle. 14. Borrow, fill or waste activity involving industrial -type power equipment shall be limited to the hours of 7:00am to 9:OOpm. 15. 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 damage to adjacent land and improvements, and damage to any public street because o slides, sinking, or collapse. 16. The developer shall reserve the right to install, maintain, remove or convert to permanent stormwater management facilities where applicable all erosion control measures required by this plan regardless of the sale of any lot, unit, building or other portion of the property. 17. 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 County erosion control inspector. 18. 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. 19. 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. 20. All temporary erosion and sediment control measures are to be removed within 30 days of final site stabilization, when measures are no longer needed, subject to approval by the County erosion control inspector. 21. This plan shall be void if the owner does not obtain a permit within 1 year of the date of approval. (Water Protection Ordinance section 17- 204G.) 22. Permanent vegetation shall be installed on all denuded areas within nine (9) months after the date the land disturbing activity commenced. (Water Protection Ordinance section 17 -207B) 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 30 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 stabilization 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 place. 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 inlets 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 lining shall be installed in both the conveyance channel and receiving channel. MS -12 through 15 - Not applicable, no live watercourses. MS -16 Underground utility lines shall be installed in accordance with the following standards in addition to other applicable criteria: a. No more than 500 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 dewatering 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 regulations shall be complied with. MS -17, 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 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 Net reduction in impervious area and the capture and non- potable re -use of stormwater will reduce runoff. VICINI 1" = 2000' TY MAP SOURCE: COUNTY GIS 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 _ TH.E 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 CONTROL MEASURES ARE TO BE PLACED PRIOR :TO OR AS THE FIRST STEP IN CLEARING. liI ES -4: A COPY OF THE APPROVED EROSION AND SEDIMENT CONTROL PLAN SHALL.,H_E tMAINTAINED 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 BY 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 - PRODUCING 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. APPROVED b f tl Ai1.)` iTl,�if Icy' G oi_9f11'y llK.',parti eni File _VU�'t:Ql_>� DRAWING INDEX 1 C -3.0 TITLE SHEET 2 C -3.1 w SEDIMENT CONTROL PLAN 3 C -3.2 EROSION AND SEDIMENT CONTROL PLAN CONT'D SITEr J CkU DR �j f _ N f ✓ ! 4 C -3.3 DRAINAGE AREA PLAN 5 C -3.4 TM: 102 / Tm: 1031\ w T A04 � r i lit/ 4 1795 "` S �+ w X\ WINERY HIL Ll�l p N , i F ♦,r .X� �, zr CN 2000 tt VICINI 1" = 2000' TY MAP SOURCE: COUNTY GIS 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 _ TH.E 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 CONTROL MEASURES ARE TO BE PLACED PRIOR :TO OR AS THE FIRST STEP IN CLEARING. liI ES -4: A COPY OF THE APPROVED EROSION AND SEDIMENT CONTROL PLAN SHALL.,H_E tMAINTAINED 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 BY 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 - PRODUCING 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. APPROVED b f tl Ai1.)` iTl,�if Icy' G oi_9f11'y llK.',parti eni File _VU�'t:Ql_>� DRAWING INDEX 1 C -3.0 TITLE SHEET 2 C -3.1 EROSION AND SEDIMENT CONTROL PLAN 3 C -3.2 EROSION AND SEDIMENT CONTROL PLAN CONT'D �4 & MITIGATION PLAN 4 C -3.3 DRAINAGE AREA PLAN 5 C -3.4 EROSION AND SEDIMENT CONTROL DETAILS 1 {?y i t.Y, ! .i` �4 W o Q. p N ♦,r O N W Z . 0^^7'' LM O r i Cc; m O ° i U H pp UB. CLARK GATHRIGHT Lic o. 3 ; X51 SIGNAL U) U) ■ E O z O J 0- ___I O U) Q cc U F_ Q z Z_ 2i _ Q� W ++ U) F-- Ld C,6 W Q� � J Z W = > 0 4� V-) W W O Q .J V C/) W REVISIONS: 01 -10 -14 DATE: 12.17.13 DRAWING NUMBER: C-3*0 SHEET 1 OF 5 1 {?y i t.Y, E &SC LEGEND OCONSTRUCTION ENTRANCE CE 3.02 SF SILLT5 FENCE CULVERT INLET PROTECTION C 3.08 ODIVERSION DIKE DD 3.09 ®TEMPORARY R.O.W. DIVERSION WD 3.11 0 OUTLET PROTECTION OP 3.18 OROCK CHECK DAM C D 3.20 OTEMPORARY SEEDING TS 3.31 OPERMANENT SEEDING PS 3.32 ®MULCHING 3.35 0 SOIL STABILIZAION MATTING 3.36 OTREE PROTECTION TP 3.38 ODUST CONTROL DC 3.39 / CHECK DAM / DRAINAGE AREA: 0.51 AC. INSTALL AT THE SAME TIME AS OTHER PERIMETER MEASURES. ° 'DITCH 1 - 3' BOTTOM W/ 2:1 SIDESLOPES B/ SF 502 OR s -- - ---510 r � / / / / LOCATE CHECK DAM ' j ADJACENT TO LARGE I / , i �e O.uaC y � • . CEDAR TREE f � ,i � . • �. --'' / / (2 -10 Ac. Size) S W0 \e D ---- -' -- 520 I V. 510.4 __-- -- ...._. -.- ____._ .--- --... ~--.. \ � � � • � ' 516 514 CIP HECK AM DRAINAGE -G-RA _ AS�RMITTED BY REA:/ .49 AC. NATURAL ROCK. INCREASE / __ °� ~- CUT-SCUT BY -- --- - -•-530 — �° -- SIC "- STABILITY, RO .---- LIMIT OF DISTURBANCE 1.35 AC. DISTURBED AREA o_ SF / o LLI LLI LLI LLJ Ar / A/ \ \ 512 TS ,1�1 /WELL pp REF. STA KE' AREA 6 `� � 528 -° r• SEQUENCE OF CONSTRUCTION 1. INSTALL CONSTRUCTION ENTRANCE, SILT FENCE, CHECK DAMS, TEMPORARY DIVERSION DIKES, AND TREE PROTECTION. 2. INSTALL NATURAL STONE IN DITCH 2 AND CULVERTS 2 AND 3 AS REQUIRED TO DIRECT UP- GRADIENT RUNOFF THROUGH THE SITE. 3. EXCAVATE AND GRADE AFTER ALL EROSION AND SEDIMENT CONTROL STRUCTURES ARE IN PLACE. 4. PLACE PERMANENT SEEDING AND MULCHING ON GRADED SLOPES. 3. REMOVE SILT FROM TRAPS AS REQUIRED FOR GENERAL MAINTENANCE. EROSION & SEDIMENT CONTROL PLAN SCALE: 1" = 20' W No CD C%4 �+ O N N s M .�W�� � Z � cn N - O V � � O � U H OF P OB. CLARK GATHRIGHT No. 036305 ��ssIONAL U cCi I, Z E J O n O J O 0 ■_ �+ U V♦ Z W v -02, Q 0 _ CD W 0:� V) � W xx J 7 L 0 CL V) �O 0 V U cn w REVISIONS: 01 -10 -14 DATE: 12.17.13 DRAWING NUMBER: C-3* I SHEET 2 OF 5 6 (10) Buffer u r LS 2,815 S.F. MITIGATION REA I �-' I / LS + + LS 4,173 S.F. 1 IGATION AREA �1'' so 00 = wv LS + , , 5,454 S.F. MITIGATION AREA + AG -bC + -C 9C I + + + + A I I, �, • PO / -I- I CC , + + + AG + 1 + + / PO CC +C + '4- qC / 8 P� CA + + + P0+ BG — ' i ' .. CA + �! AG AG + .. _ . AG , BG B / + w ii �� 4 (IG) Slate Quarry Cree}� _ .. — .. —�_ — .. Io+ + + Wit--` / -- , — _..— ..— ..— .. —.._ .. BG S + +BG �_- _ _ ___ - `� __ ) ' 901 S.F. MITIGATION AREA + + 5 (RC) —` 1,039 S.F. MITIGATION AREA LS STREAM BUFFER AREA OF - / DISTURBANCE: 5,807 S.F. 11,614 S.F. MITIGATION _-- / -- --- ___ --- A `�— �, t AREA REQUIRED '� / / ✓ / —_ /_ — _- - 500 — - Zone Line / J� ' \ Flood Stream -' _ — �` 2 _ _�. _ ----_ - 0 - -_ MITIGATION PLAN SCALE: 1" = 20' Mitigation Option 1 - Mitigate through new plantings and permanent protection as given below. New plantings must be in the stream buffer area. For every 400 square foot unit or fraction thereof, plant: 1. One canopy tree measuring 1 X" - 2" caliper or a large evergreen 6 feet in height 2. One understory tree measuring '/" - 1 %" caliper or one evergreen 4 feet in height 3. One small shrub 15" - 18" in height. OPTION 1 MITIGATION REQUIREMENTS QUANTITY DISTURBED AREA IN 5,807 S.F. STREAM BUFFER PO REQUIRED MITIGATION 11,614 S.F. AREA (x2) SYCAMORE N REQUIRED PLANTINGS 29 (PER 400 S.F.) MITIGATION AREA 14,382 S.F. PROVIDED LIQUIDAMBAR STYRACIFLUA LS LANDSCAPING SCHEDULE W SYMBOL P SNTING QUANTITY TYPE w PLATANUS OCCIDENTALIS PO 1.5 -2" C 6 LARGE CANOPY a! SYCAMORE N ~ LIQUIDAMBAR STYRACIFLUA LS 1.5 -2" C 8 LARGE CANOPY SWEET GUM BETULA NIGRA RIVER BIRCH BG 1.5 -2" C 5 LARGE CANOPY ILEX OPACA AMERICAN HOLLY 10 6' HT. 15 EVERGREEN TOTAL 34 V lod AMELANCHIER X GRANDIFLORA AG 0.75 -1.5" C 10 UNDERSTORY SERVICEBERRY CARPINUS CAROLINIANA CA 0.75 -1.5" C 9 UNDERSTORY HORNBEAM CERCIS CANADENSIS CC 0.75 -1.5" C 8 UNDERSTORY REDBUD ■ .r TOTAL 27 V) ILEX GLABRA IG 15 -18" HT. 8 INKBERRY V) RHODODENDRON CATAWBIENSEA 15 -18" HT. RHODODENDRON RC 16 z VIBURNUM NUDUM VN 15 -18" HT. 8 VIBRUNUM E KALMIA LATIFOLIAA Q 15 -18" HT. MOUNTAIN LAUREL KL 1 TOTAL 33 );DF x x x x x x x g / o LL- Uj w % % LIMIT OF DISTURBANCE 0.2 AC. DISTURBED AREA cn-- / 2 D R A I N F I E L D E &S C PLAN TOPO FROM COUNTY GIS SCALE: I"= 20' W o CL rn O CN N Co C!) CJ) L � � � O O V lod ° U H OP O B. CLARK GATHRIGHT Lic. No. 036 05 , NALj� ■ .r z 0 E Q © 0 © C-6 z ■ 0 U cc Q Z a� CD 0 0� > U J Z CL U J p W U) - I REVISIONS: 01 -10 -14 DATE: 12.17.13 DRAWING NUMBER: C-302 SHEET 3 OF 5 W o � rn O N �-+ O N N Ca ai Q) W U) U) — O O cu lod O ° c- U �p,LTH pF P OB. CLARK GATHRIGHT U No. 036305 ,0 ��s'sI�NAL ■ 4� ■ O O ■ � Z CD Ld J J C L O Un REVISIONS: 01 -10 -14 DATE: 12.17.13 DRAWING NUMBER: C-3*3 SHEET 4 OF 5 CONSTRUCTION OF A SILT FENCE SILT FENCE DROP INLET STONE CONSTRUCTION ENTRANCE (WITH WIRE SUPPORT ) PROTECTION �t Lll o 1. SET POSTS AND EXCAVATE A 4 "X4" 2. STAPLE WIRE FENCING TO THE POSTS. �J IL T FENCE C UL VER T INLET M TRENCH UPSLOPE ALONG THE LINE 2 X 4' WOOD FRAME PROTECTION o CV EXISTING 70' MIN, PAVEMENT OF POSTS. DROP INLET -+ O N Al 3. WITH GRATE ^ ' 5:1 ENDWALL ` V bt� . �--v n � ) FILTER CLOTH 6" MIN. q MOUNTABLE BERM 1,5' MAX. �- ('\ FRAME a% (OPTIONAL) SIDE ELEVATION 1 -� S ! TOE OF FILL CULVERT EXISTING GROUND ` 3 MIN. 70' MIN. l V�� -y o i1 zW GATHER B WASHRACK 10' MIN. C�--� C� / - EXCESS (OPTIONAL) � � = � � I= AT CORNERS * 10' MIN. FLOW I u —_ I u.. o _0 12' MIN. �— EXISTING III III r L— PAVEMENT 4„ PERSPECTIVE VIEWS °° TOE OF FILL - 0 CU ° � � U 3. ATTACH THE FILTER FABRIC TO THE WIRE 4. BACKFILL AND COMPACT THE STAKE SILT FENCE o o * VDOT #1 �� POSITIVE DRAINAGE 1�N, FENCE AND EXTEND IT INTO THE TRENCH. EXCAVATED SOIL. I DISTANCE IS 6 MINIMUM IF FLOW COURSE AGGREGATE B TO SEDIMENT IS TOW RD EMBANKMENT TRAPPING DEVICE * MUST EXTEND FULL WIDTH FABRIC � FLOW OPERATION INGRESS AND EGRESS PLAN VIEW «(JJJ K �:: 1' MIN, OPTIONAL ST CO NA TION :ti... 12' MIN. } ,. t. I J / v. w• 7.. J I /9 V 3 MIN. A =� 1=l -1 I 3" MIN. ( iit^ IC;1 H op ELEVATION OF STAKE AND FILTER CLOTH SECTION A -A FABRIC ORIENTATION DETAIL A / FLOW / FLOW 6'-7" III i••' I 2.5' O B. No. 036305 HT EXTENSION OF FABRIC AND WIRE INTO THE TRENCH. SPECIFIC APPLICATION *VDOT #3, #357, #5, 56 OR 57 COARSE AGGREGATE CLASS I RIPRAP . THIS METHOD OF INLET PROTECTION IS APPLICABLE WHERE THE TO REPLACE SILT FENCE IN "HORSESHOE WHEN FILTER FABRIC INLET DRAINS A RELATIVELY FLAT AREA (SLOPE NO GREATER HIGH VELOCITY OF FLOW IS EXPECTED SIONAL THAN 5%) WHERE THE INLET SHEET OR OVERLAND FLOWS (NOT EXCEEDING 1 C.F.S.) ARE TYPICAL. THE METHOD SHALL NOT REINFORCED CONCRETE DRAIN SPACE - APPLY TO INLETS RECEIVING CONCENTRATED FLOWS, SUCH AS IIIU I I ` WIRE I IN STREET OR HIGHWAY MEDIANS. SECTION B -B <<�'; SOURCE: ADAPTED from 1983 Maryland Standards for Soil erasion and Sediment Control, and Va. DSWC Plate 3.02 -1 SOURCE: Adapted from Installation of Straw and Fabric Filter Barriers for Sediment Control, PLATE. 3.05 -1 SOURCE: N.C. Erosion and Sediment Control Planning and Design Manual, 1988 PLATE 3.07 -1 SOURCE: ADAPTED from VDOT Standard Sheets and Va. DSWC PLATE. 3.08 -1 Shemood & Nyant CONSTRUCTION ENTRANCE DETAIL 2 SILT FENCE DETAILS 3 CULVERT INLET PROTECTION DETAILS C -3.4 SCALE: NONE C -3. SCALE: NONE C -3.4 SCALE: NONE R 0 CK CHECK DAM CSC ■ 2 ACRES OR LESS OF DRAINAGE AREA: C) J o s" O 3, � w FILTER CLOTH 0 (OPTIONAL) J (DOWNSTREAM VIEW) 0 VDOT #1 COARSE AGGREGATE U) 0 FLOW ti'I 3' � U TEMPORARY DIVERSION DIKE Q w v z 2E A 2 -10 ACRES OF DRAINAGE AREA: CD 0 of w Compacted Soil A 3d° (MIN.) > W s" 18" min. d � � J W / J z —Flow � 3' /� PIPE OUTLET TO WELL FILTER CLOTH CL L > 0 DEFINED CHANNEL (OPTIONAL) U, PLAN VIEW I �-- U) —0111110111111 Will I Ultubmilill N11111 01111110 y (DOWNSTREAM VIEW) 0 0 4.5' min. L a- 5' I ( r n U t� I I VDOT #1 C) W 0 % COARSE AGGREGATE ZIC d FLOW �I , 01 -10 -14 REVISIONS: r I'al i W14 SECTION A -A 3' FILTER CLOTH KEY IN 6 " -9'•; RECOMMENDED FOR ENTIRE PERIMETER 40° PLASTIC FENCE SOURCE: VA. DSWC PLATE 3.09 -1 CLASS I RIPRAP CORRECT METHODS OF TREE FENCING DATE: DATE: 12.17.13 4 DIVERSION DIKE DETAIL 5 OUTLET PROTECTION DETAIL SOURCE: VA. DSWC PLATE. 3.20 -1 DRAWING NUMBER: 6 ROCK CHECK DAM DETAIL 7 TREE PROTECTION DETAIL UM ER. C -3,q. SCALE: NONE C -3,4 SCALE: NONE C -3, SCALE: NONE C -3,4 SCALE: NONE r em SHEET 5 OF 5