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HomeMy WebLinkAboutWPO201700028 Review Comments WPO VSMP 2018-01-26 (2)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 title: Project file number: Plan preparer: Owner or rep.: Plan received date: (Rev. 1) (Rev. 2) Date of comments: (Rev. 1) (Rev. 2) Reviewer: VSMP Permit Plan Review Hyland Park WPO-2017-00028 Collins Engineering Hyland Park, LLC (Alan Taylor) 23 March 2017 21 September 2017 12 December 2017 5 May 2017 25 October 2017 25 January 2018 Matt Wentland County Code section 17-410 and Virginia Code §62.1-44.15:34 requires the VSMP authority to act on any VSMP permit by issuing a project approval or denial. This project is denied. The rationale is given in the comments below. The VSMP application content requirements can be found in County Code section 17-401. A. Stormwater Pollution Prevention Plan (SWPPP) 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. 1. Provide a signed registration statement and a signed certification. (Rev. 1) Comment addressed 2. Include copies of the approved ESC and SWM plan sheets. This can be done before the first inspection. (Rev. 1) Response noted B. Pollution Prevention Plan (PPP) The PPP content requirements can be found in County Code section 17-404. 1. The PPP exhibit will need to include the entire proposed development. (Rev. 1) Comment partially addressed. Please include the Cascadia connection in the PPP. (Rev. 2) Comment addressed. C. Stormwater Management Plan (SWMP) VSMP Regulation 9VAC25-870-108 requires the VSMP authority to approve or disapprove a SWMP. This plan is disapproved, and the reasons are provided in the comments below. The stormwater management plan content requirements can be found in County Code section 17-403. The plans will need to be signed prior to approval. (Rev. 1) Response noted Provide a sheet showing the extents of the proposed SWM Forest and Open Space Area (and label as such). The area will need to be shown on an easement plat (this can be done on the final Engineering Review Comments Page 2 of 3 subdivision plat). Include the following note on both the plans and the plat: "The SWM Forest and Open Space Easement is subject to the guidance set forth by DEQ in the Virginia Stormwater Management Program. The areas will remain undisturbed in a natural, vegetated state, except for activities as approved by the local program authority, such as forest management, control of invasive species, replanting and revegetating, passive recreation (e.g., trails), and limited bush hogging to maintain desired vegetative community (but no more than four times a year)." (Rev. 1) Comment addressed 3. Basin ABiofilter A will need to be released into a defined stormwater conveyance system or converted to sheet flow. There does not appear to be a clearly defined channel below the proposed outfall. (Rev. 1) Comment partially addressed, see comment below. (Rev. 2) Comment addressed. 4. Provide the channel protection analysis for the outfall of Basin BBiofilter B. (Rev. 1) Comment partially addressed. Provide drainage area maps showing the limits of analysis have been met for both outfalls (1 % of total DA) or show that the energy balance equation has been met. (9VAC25-870-66B) (Rev. 2) Comment addressed. 5. The disturbance associated with Basin ABiofilter A will need to be removed from the preserved slopes until updated field run topo has been provided showing the disturbed slopes are less than 25%. (Rev. 1) Comment partially addressed. The County Engineer has determined that certification from a surveyor will be required when preserved slopes in the GIS overlay are shown to be less than 25 % (this will apply to future plans as well). Please contact Frank Pohl if further guidance is needed. Additionally, the areas of preserved slopes shown on and behind Lot 9 will need to be field verified (or the building lot and retaining wall revised) prior to approval. (Rev. 2) Comment not addressed. 6. The flood protection analysis should be shown for each outfall separately. The 10-yr post for DA `A' is higher than the 10-yr pre and further analysis will be needed. (Rev. 1) Comment addressed 7. Side slopes for the detention cells should have a gradient of 4:1 or 5:1 for easier maintenance and safety. (Rev. 1) Comment addressed. 3:1 is acceptable. 8. Please note that a grading permit will not be issued until after the road plans have been approved. (Rev. 1) Response noted Revision 1 Comments Show all SWM measures associated with the Cascadia connector (grading plan comment). The connection will also have to match the road plans and any necessary off -site easements will need to be acquired prior to approval. (Rev. 2) Comment addressed. Revision 2 Comments 10. The note on sheet 13 regarding the pre- and post -development drainage to the existing roadside ditch refers to calculations on sheet 16, which was not part of the plan sheets submitted. 11. The 8.54 lbs. of nutrient credits will need to be purchased prior to issuing a grading permit (17- 502(D)2). Please provide a document from the credit bank stating the availability and contact Ana Kilmer prior to purchasing any credits. D. Erosion and Sediment Control Plan (ESCP) Virginia Code §62.1-44.15:55 requires the VESCP authority to approve or disapprove an ESCP. This plan is approved, and the reasons are provided in the comments below. The erosion control plan content requirements can be found in County Code section 17-402. Show limits of the Forest and Open Space on the ESC sheets and show the ESC measures for the installation of the trail. The disturbance of the Forest and Open Space Area should be as limited as Engineering Review Comments Page 3 of 3 possible and tree protection will need to be provided. Any areas shown in a SWM Forest and Open Space Easement that are disturbed during construction will need to be restored per DEQ BMP Specification No. 4, Soil Compost Amendment. (Rev.1) Comment addressed. Revision 1 Comments 2. Show all erosion and sediment control measures associated with the Cascadia connector (grading plan comment). The connection will also have to match the road plans and any necessary off -site easements will need to be acquired prior to approval. (Rev. 2) Comment addressed. The VSMP permit application and all plans may be resubmitted for approval when all comments have been satisfactorily addressed. For re -submittals please provide 2 copies of the complete permit package with a completed application form. Engineering plan review staff are available from 2-4 PM on Thursdays, should you require a meeting to discuss this review. 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 complete the request for a pre -construction conference 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; http://www.albemarle.org/dpptfonns.asp?department=cden,gwpo File: WPGz01700028 Hyland Park Rev2 01-25-18.doc