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Home My WebLink AboutWPO201200088 Review Comments Erosion Control Plan 2012-11-146bw r.� k7; ��RGIN�P COUNTY OF ALBEMARLE Department of Community Development 401 McIntire Road, Room 227 Charlottesville, Virginia 229024596 Phone (434) 296 -3458 Fax (434) 9724126 Project: Farmington Country Club, # 17 Tee Renovation Plan preparer: Scott Kinnan, CGCS [434- 245 -5370] Owner or rep.: Farmington Country Club Plan received date: 11/2/2012 Date of comments: 13 Nov 2012 Reviewer: Roberge, Michelle A. Erosion Control Plan (WP0201200088) Thank you for submitting your Sediment & Erosion Control Plan. I have provided a list of comments that will help expedite your Water Protection Ordinance Planning Application approval. I included a quick sketch of my recommendations. If you follow the recommendations your plan will meet the state minimum standards and I can grant you approval. If you would like to do something different, submit a new plan with the required state minimum standards. You are more than welcome to make an appointment on Thursday, November 15, 2012 from 2pm to 4pm if you have additional questions or feel free to call me at 434 - 296 -3458. 1. Locate the property line. 2. Show a construction entrance, STD & SPEC 3.02 3. Include the general sediment and erosion control notes from the Albemarle County Design Standards Manual 02 -12 -2010. 4. Phasing does not work with the proposed grading. I suggest fencing off the entire site and complete grading in one phase. 5. Provide notes on Dust Control, Temporary Seeding, and Permanent Seeding to stabilize site immediately and prevent further erosion. 6. Show spot elevations in between tees to clarify the drainage shown in the detail section. 7. 1 recommend providing a diversion dike to a sediment trap near the lowest tee. 8. If you would like to complete the project in two phases, provide a revised grading plan. The silt fence you have proposed running across the site will suffice. Sincerely, Michelle Ro erge County Engineer 434 - 296 -3458 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 e10. 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:OOam 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 75 Ibs /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. rosion control devices shall be made immediately. 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 datethe land disturbing activity commenced. (Water Protection Ordinance section 17- 2076) 1992 3.13 TEMPORARY SEDIMENT TRAP 1' VARIABLE ORIGINAL VARIABLE* GROUND ELEV. 67 CU. YD. /ACRE �, + VARIABLE I, � 67 CU. YD. /ACRE (EXCAVATED) l FILTER CLOTH ORIGINAL 1 GROUND ELEV. *SEE PLATE 3.13 -1 COARSE AGGREGATE CLASS I RIPRAP CROSS SECTION OF OUTLET CLASS I RIPRAP COARSE AGGREGATE EXCAVATED FILTER CLOTH AREA ..COARSE AGGREGATE SHALL BE VDOT #3, #357 OR #5 OUTLET (PERSPECTIVE VIEW) Source: Va. DSWC 111-76 Plate 3.13 -2 1992 MINIMUM TOP YID TH (W) REQUIRED FOR SEDIMENT TRAP EMBANKMENTS AC'C'ORDING TO HEIGHT OF EMBANKMENT (FEE T) iW! H HO W ------- ---- -- 1.5 0.5 2.0 2.0 1.0 2.0 2.5 1.5 2.5 3.0 2.0 2.5 N 3.5 2.5 3.0 H o H 4.0 3.0 3.0 4.5 3.5 4.0 5.0 4.0 4.5 EXCAVATED AREA MAX. DEPTH = 4' ORIGINAL GROUND ELEV. 3.13 Source: Va. DSWC Plate 3.13 -1 3. The earthen embankment shall be seeded with temporary or permanent vegetation (see Std. & Spec.'s 3.31 and 3.32) immediately after installation. 4. Construction operations shall be carried out in such a manner that erosion and water pollution are minimized. 5. The structure shall be removed and the area stabilized when the upslope drainage area has been stabilized. 6. All cut and fill slopes shall be 2:1 or flatter (except for excavated, wet storage area which may be at a maximum 1:1. grade). 111-74 ,-TOLE 17 TEE CONSTRUCTION PLAN N FARMINGTON COUNTRY CLUB w O to et %IE 0 CAR PATH. ! P%%&*s GR DE OUT AND RL'.1(IVE EXISTING. GULF E '•..1_4iC ly ND SI OPFS SmoOl I I1' INTO ADIAC.E NT GRADES. 1 � BUILD A CHAh1P10NSFIIPTEE. PROPOSED I , - TEE 24 FT. DY 36 FT PtA44 Cc, v+,; INSTALL SILT FENCE WI FH WIRE SUPPORT rvioy O RFI OCATF GOI F- CAR PATH. s /,/ / �n sir Nip ) LLJ /�! F Act O 166 •Y �' .SSA ��' l N/ »? �6g,. 5... _. -5s, INI'KE SLF L SALT FENCE WITH 'i°�. S 6 iSq s . ,G \ , 582 - I i, .560 513 ' `_ 'k ,84 - / � I � SG �. '.. + ` . � \+ -` I♦ I.�,�, til C7•E I.5 %u SLOPF ♦ _ �.* ' -• .— �- / �� T. EL 584.5 / T. EL. 580.5 T. EL. 576.5 - -- T. EL 572.5 . PRfJPOSEU'OREINTATION OF FORWARDTEES F E \`. T. EL 558.4 t J \ T. EL 562 5 �r1 •l PROPOSED CENTERLINE OF CALF ,HOLE LE'♦TERLINE (7 7,;, HOIF SLOPE si.ort 1.5% SLOPE . ` '. , 1. "' .- _ �!' `- -_- ..` ...• PROPOSED FEES 24 FT. BY 36 FL P P o TEE AS TWO TEES. •�` .. � - IMTTSOF DI. Tl1RBANCE' `•� �� ♦ ...._..I �- - REBUILD AND RESHAPE TEE. PROPOSED - � �' � ♦ -. �\ _O TEE 24 FT. BY 70 FT. ` REBUILD AND RESHAPETEEAT EXISTING ELEVATION. \ U PROPOSED TEE 24 FT. BY iU FT: REBl1F1_D AND RESHAPE TEE. PROPOSED � TEE 24 FT. BY 58 FT. 7