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Home My WebLink AboutWPO201400075 Review Comments No Submittal Type Selected 2014-10-01�pF A vt�r�1Q COUNTY OF ALBEMARLE Department of Community Development 401 McIntire Road, Room 227 Charlottesville, Virginia 22902 -4596 Phone (434) 296 -5832 Fax (434) 972 -4126 Project: Rocky Hollow - WP0201400075 Plan preparer: Justin Shimp, Shimp Engineering [201 E Main St., Suite M, Charlottesville, VA 22902 -5273 - justinAshimp -en ing eerieg com ] Owner or rep.: Adriana K. Tuerk, Trustee of the Adriana K. Tuerk Living Trust [P.O. Box 85, Isla, FL 33036] Plan received date: 29 August 2014 Date of comments: 1 October 2014 Reviewer: John Anderson A. Stormwater Pollution Prevention Plan The SWPPP content requirements can be found in County Code section 17 -405. A SWPPP must contain (1) a PPP, (2) an ESCP, (3) a SWMP, and (4) any TMDL measures necessary. L Furnish SWPPP/PPP —focus on land disturbance. Please use 8 -p. SINGLE- FAMILY STORMwATEx POLLUTION PREVENTION PLAN TEMPLATE found at VDEQ Construction General Permit website: link - http:// www. deq.viri4inia.gov/Portals /0 /DEQ/ Water /StormwaterManagement /CPoD SWPPP SFR 201407.docx. B. VSMP: SWPPP: Stormwater Management Plan — The stormwater management plan requirements can be found in County Code section 17 -403. 1. Submit VSMP Application/SWM plan. Application form may be found on County website, Engineering Applications and Forms (last .pdf) —fee based upon total area of disturbance (1.91 Ac.) Note: project is subject to SWM requirements since disturbance >1.0 Ac. [§17-303.C.] Although code makes provision for Agreement in lieu of a stormwater management plan (§ 17- 403.B.), definition of Agreement in lieu of a stormwater management plan (§ 17 -205) implies compliance with requirements of the VSMP. Relief or exceptions from the requirements of the VSMP (§ 17 -408) appear so limited as to be of negligible benefit. 2. This is new development: please use VaRRM New Development spreadsheet — link: httD:// www .dea.viri!inia.eov/Portals /0 /DEO /Water /StormwaterManaeementNRRMNRRM Spreadsheets v2.8_2013.zip 3. Furnish SWM Narrative. 4. Note: May elect to control runoff at any point or location on developed property, including near residence. Also —VSMP Registration Statement is not required. [§17-401.C] C. VSMP: SWPPP: Erosion Control Plan — The erosion control plan content requirements can be found in County Code section 17 -402. 1. C2 — Expand project description to include: drive length; critical slope disturbance (sf); stream buffer disturbance (14,756 sf); and any alternative driveway alignments considered. -§17-402.C.5. 2. C2 — Sequence: describe provisions for stream bypass, or work in live stream. Note: Obtain state - federal permits to work in live stream. — Sequence, Stage 1, item #3 — requires detailed narrative. 3. C3 — Clarify /specify grading improvements to existing logging road, slope 13.5 %. Engineering Review Comments Page 2 of 3 4. C3 -Show spoils and stockpile locations, if any. 5. C3 -Show staging area; equipment maintenance /refueling location. 6. C3 - Identify /show stream buffer mitigation area: possibility exists west of driveway along stream where GIS photometric data shows reach with minimal buffer. (On sheet C3, area near soil label 79B that is adjacent to soil area 89B is one possible location.) 7. C4 - Show /shade critical slope areas. Areas shown on C3, but please transfer to 1 " =10' view, C4. 8. C4 -Label outlet protection L x W x D dimensions (OP). 9. C4 - Furnish driveway culvert near box culvert to divert ditch flow from stream to SWM BMP. 10. C4 - Furnish SF on graded slopes at box culvert outfall to limit sediment deposition in stream. 11. C4 -Show 100' stream buffer. 12. C4 -Show wood /forest line. 13. C4 -Show or define angle of each wing wall relative to box culvert. 14. C4 - Recommend aprons, box culvert, given site /stream conditions. [VDOT Drainage Manual, 8.3.3.4.6] Troy Austin, VDOT, may be able to provide guidance /assistance: 434.422 -9373. 15. C4 - Identify ESC feature south of driveway -brick symbol = riprap ditch? 16. C4 - Provide /specify ground cover hardier than grass for slopes steeper than 3:1. [ACDSM 8.A.2.] 17. C4 - Furnish EC -1 stabilization matting for slopes at wing walls at outlet end of box culvert. 18. C5 - Furnish box culvert wall, floor, ceiling dimensions. Provide steel reinforcement schedule, or specify pre -cast system. 19. C5 - Driveway section: identify surface material; identify base material. Show dimensions /depth. 20. C5 - Furnish cross - section of stream bed at box inlet: stream bed elevation affects countersinking, which affects free height. [§ 17- 402.C.5; Drainage Manual, 8.3.7.2.2]. Estimate /show OHW at box culvert inlet, and stream width. 21. C5 - Confirm box culvert design per VDOT Drainage Manual 8.3.7.2.3 - "determine the required hydraulic opening (size) based on no countersinking; then specify the next larger size structure." And, Drainage Manual, Ch. 15, DDM 1 -6: Summary of General Design Criteria. 22. Furnish Foundation Investigation: "Foundation data will be requested for all culvert installations with a diameter or span of 36 inches or greater." [VDOT Drainage Manual, Ch. 15, DDM 1 -13] D. VSMP: Mitigation Plan - The mitigation plan requirements can be found in County Code section 17 -406. 23. Furnish mitigation plan. Identify potential candidate stream buffer mitigation areas on property, ideally, within 100' of stream. 24. Furnish mitigation planting schedule- options, below: 1. Option 1- Mitigate through new plantings and permanent protection as given below. New plantings must be in the stream buffer area. Applicant has choice of planting one of the following: a. For every 400 square foot unit or fraction thereof, plant one (1) canopy tree measuring 1 'h" — 2" caliper or a large evergreen 6 feet in height, one (1) understory tree measuring W'— 1 V2s caliper or one evergreen 4 feet in height, and one (1) small shrub 15" — 18" in height. b. For every acre or fraction thereof, plant 1,210 hardwood an&orpine seedlings on approximately 6 "X6' centers without tree tubes and mats. c. For every acre or fraction thereof, plant 600 hardwood andlor pine seedlings on approximately 8'X8' centers with tree tubes and mats. 2. Option 2 — Mitigate by preserving existing buffer where currently not required by ordinance; i.e. preserve stream buffers on intermittent streams in the development areas. Mitigation must be accomplished by permanent protections as given below. Permanent Protection for each of these options will be inclusion in the Thomas Iefferwn Soil and Water Conservation District (TISWCD) Easement Program, or recordation of a permanent maintenance agreement and escrow to run with the land. Engineering Review Comments Page 3 of 3 Engineering plan review staff are available from 2 -4 PM on Thursdays, should you require a meeting to discuss this review. Plan review staff are also available at 434 - 296 -5832 ( -ext 3069) should you have questions. Process: After approval, plans will need to be bonded. The bonding process is begun by submitting a bond estimate request form and fee to the Department of Community Development. One of the plan reviewers will prepare estimates and check parcel and easement information based on the approved plans. The County's Management Analyst will prepare bond agreement forms, which will need to be completed by the owner and submitted along with cash, certificates or sureties for the amounts specified. The agreements will need to be approved and signed by the County Attorney and County Engineer. This may take 2 -4 weeks to obtain all the correct signatures and forms. Stormwater Management Facilities Maintenance agreements will also need to be completed and recorded. The County's Management Analyst or other staff will prepare the forms and check for ownership and signature information. The completed forms will need to be submitted along with court recording fees. After bonding and agreements are complete, county staff will need to enter project information in a DEQ database for state application processing. DEQ will review the application information based on local VSMP authority approval. At this time, the DEQ portion of the application fees will need to be paid directly to the state. For fastest processing, this is done electronically with the emails provided on the application. DEQ should notify applicants with instructions on how to pay fees. When DEQ approves the application, they will issue a permit coverage letter. This should be copied to the county. After DEQ coverage is issued, via the coverage letter, the County can hold a pre - construction conference. Applicants will need to request a pre - construction conference by completing a form, and pay the remainder of the application fee. The form identifies the contractor and responsible land disturber, and the fee remaining to be paid. This will be checked by county staff, and upon approval, a pre - construction conference will be scheduled with the County inspector. At the pre - construction conference, should everything proceed satisfactorily, a joint VSMP and grading permit will be issued by the County so that work may begin. County forms can be found on the county website forms center under engineering; htt2://www.albemarle.org/deptforms.asp?departrnent--cdengmMo File: WP0201400075 -rocky hollow escp -pvt residence - 100114