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HomeMy WebLinkAboutWPO201900062 Review Comments WPO VSMP 2021-05-03�r County of Albemarle m COMMUNITY DEVELOPMENT DEPARTMENT VSMP Permit Plan Review Project title: Southwood Village — Amendment 1 Project file number. WPO-2019-00062 Plan preparer: Timmons Group Clint Shifflett [clint.shifflett@timmons.com] Owner or rep.: Charlottesville Habitat for Humanity Andrew Vinisky[avinisky@cvillehabitat.org] Plan received date: 19 March 2021 Date of comments: 3 May 2021 Reviewer: Matt Wentland 401 McIntire Road, North Wing Charlottesville, VA 22902-4579 Telephone:434-296-5832 WWW.ALBEMARLE.ORG 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. Update the on -site SWPPP with this amendment once approved. B. Pollution Prevention Plan (PPP) The PPP content requirements can be found in County Code section 17-404. 1. Update the on -site PPP with this amendment once approved. 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. This plan cannot be approved until the additional 0.48 Ib/yr of nutrient credits have been purchased. Please contact Ana Kilmer prior to purchasing credits. Once the total load reduction required reaches 10 Ib/yr, between this project and all others on the property, 75% of the reductions will need to be achieved on -site (9VAC25-870-69(B)3). DEQ has also updated their credit purchasing requirements, located in 9VAC25-900-91(B)3. Since this project drains to impacted streams, the credits will need to be purchased from a bank located in the same 8-digit HUC. The process goes upstream, then HUC12, HUC10, Engineering Review Comments Page 2 of 3 and HUC8, at which point the Ivy Creek credit bank is in the same HUC8. The credits will need to be purchased from the Ivy Creek bank unless you have a Letter of Credit Availability dated prior to January 1, 2021. 2. The maximum side slopes allowed by the County inside a basin is 3:1. 3. Provide details for the retaining wall located in the stormwater basin. Show the TW and BW and note whether the wall is below the water level during design storms. 4. Provide fence and or railing around the proposed pond, as it is located close to backyards and adjacent to the proposed trail. 5. Update the bioretention details on sheet C6.01. The forebay in bioretention 1 also appears to be too small. 6. The post-dev drainage area map on C6.00 appears to be incorrect. It shows the DA to structure 302 going to bioretention 1, however 302 goes to bioretention 2. It also shows the drainage from the southern half of Wardell Crest going to bioretention 1, but the pipe system bypasses the bioretention. Please verify and correct as needed. 7. Update the water quality narrative in the calculations package. 8. Per the Code of Development, residential lots are to be located outside of stream buffers, preserved slopes, and floodplains. Several lots on Wardell Crest will need to be revised. 9. Detail how the roof drain discharge will be handled on the backs of the lots. A concentrated flow to steep slopes is not recommended. 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 disapproved, and the reasons are provided in the comments below. The erosion control plan content requirements can be found in County Code section 17-402. 1. The match lines between sheets do not appear to match. Portions of SB1 are not shown. 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, erosion and sediment control and stormwater management improvements must be bonded. The bonding process begins when the plan is approved, and the applicant submits a bond estimate request form and fee to the Department of Community Development. A plan reviewer 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 Engineering Review Comments Page 3 of 3 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 to the County, who will record the agreement. After bonding and agreements are complete, county staff enters project information in a DEQ database for state application processing, if a DEQ permit is required. DEQ reviews 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, which must be posted at the construction site. After DEQ coverage is issued, via the coverage letter, the County can hold a pre -construction conference. Applicants must 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, ajoint 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; httDS://www.a lbemarle.oro/aovernment/com m un itv-develoDment/a DDIv-for/ena i neeri na-applications File: WPO201900062 Southwood Village Amendment 1 review comments 05-03-21.docx