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Home My WebLink AboutWPO202100038 Review Comments WPO VSMP 2022-05-18County of Albemarle m COMMUNITY DEVELOPMENT DEPARTMENT 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 Southwood Village 2 W PO-2021-00038 Timmons Group Clint Shifflett [clint.shifflett@timmons.com] Charlottesville Habitat for Humanity Andrew Vinisky[avinisky@cvillehabitat.org] 8 July 2021 6 December 2021 4 April 2022 20 August 2021 14 January 2022 18 May 2022 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. Will the existing DEQ permit be used to cover this area? If so, please provide a completed and signed DEQ Registration Statement modification if the area increased from the original permit, or a new Registration Statement with Village 2's information if not. (Rev. 1) Comment addressed. 2. Provide a signed certification. (Rev. 1) Comment addressed. B. Pollution Prevention Plan (PPP) The PPP content requirements can be found in County Code section 17-404. 1. The PPP is acceptable at this time. 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. 1. This plan cannot be approved until the 3 481.43 Ib/yr of nutrient credits have been purchased. Please contact Ana Kilmer prior to purchasing credits. Since this project drains to impacted streams, the credits will need to be purchased from the Ivy Creek credit bank. (Rev. 1) Comment not addressed, response noted. (Rev. 2) Response noted. Engineering Review Comments Page 2 of 4 2. Show the SWM Forest & Open Space from the Village 1 plans on these plans. No improvements are allowed in this area (including stone dust trails) and any grading will require DEQ BMP Spec. 4 Soil Amendments to be used. This may require changes to the Village 1 amendment. (Rev. 1) Comment partially addressed. Provide a more detailed exhibit showing the F&OS, the new mitigation area, and the limits of disturbance. It appears everything is outside of the area, but it is difficult to tell. (Rev. 2) The Open Space Plan sheets were not included in the submitted plan set. 3. The maximum side slopes allowed by the County inside a basin is 3:1. The basin should also be moved out of the buffer as much as possible. (Rev. 1) Comment addressed. 4. Due to the pond's drainage area being less than 10 acres, provide a water balance calculation (DEQ BMP Spec. 14, section 6.2). (Rev. 1) Comment addressed. 5. Provide more detail on the pretreatment forebays. DEQ BMP Spec. 14, section 6.4 requires forebays to be at least 4 feet deep with an aquatic bench. Show how the forebays meet all items in this section. (Rev. 1) Comment not addressed. The forebays will need to meet the section 6.4 design requirements for pretreatment forebays. (Rev. 2) Comment addressed. 6. Provide a landscaping plan for the basin per section 6.7. (Rev. 1) Comment addressed. 7. Show the maintenance access to all elements of the basin and how it meets section 6.8 (slope, width, etc.). This will need to be in an easement. (Rev. 1) Comment not addressed. It appears there is a retaining wall running through the access easement and it is still unclear how it will loop around the pond while avoiding the areas that are not to be disturbed. (Rev. 2) The revised access easement will need to be traversable by equipment. It currently is shown with 2:1 grading in the middle of the easement. 8. Include the maintenance requirements from section 9 on the plans. (Rev. 1) Comment addressed. 9. The buffer disturbance from the basin will require a mitigation plan. (Rev. 1) Comment addressed. Please note that this area will need to be vegetated and undisturbed at bond release. 10. Provide fence and or railing around the proposed pond, as it is located close to backyards and adjacent to the proposed trail. (Rev. 1) Comment not addressed. Sheet C4.01 was not in the plan set. Also include a detail of the fence. (Rev. 2) Comment addressed. 11. Provide more detail on the storm sewer behind the cul-de-sac lots (elevations, profile, etc.) and how run-off will reach the system. The drainage area map shows all the run-off above the storm sewer being collected, but the grading appears to show it sheet flowing and bypassing the inlets. The storm sewer should also be moved outside of the buffer. (Rev. 1) Comment partially addressed. These pipes are no longer showing on the plans (like the layer is off). (Rev. 2) Comment addressed. 12. Per the Code of Development, residential lots are to be located outside of stream buffers, preserved slopes, and floodplains. Grading for the lots should also be outside the buffer. (Rev. 1) Comment addressed. 13. Private drainage easements should be a minimum of 10' wide. The easement width calculation from the Design Standards Manual should still be used for pipes not at minimum depth. (Rev. 1) Comment addressed. 14. Drainage easements that are not a constant width should be labelled as variable width. Some of the other easement widths appear to be incorrectly labelled (such as the 10' label on the easement for pipe 101). (Rev. 1) Comment addressed. D. Erosion and Sediment Control Plan (ESCP) Engineering Review Comments Page 3 of 4 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. 1. Some of the ESC measures appear to slightly overlap the preserved slopes. Relocate these items so the slopes are not disturbed. (Rev.1) 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, 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 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, a joint VSMP and grading permit will be issued by the County so that work may begin. Engineering Review Comments Page 4 of 4 County forms can be found on the county website forms center under engineering; https://www.albemarle.org/government/com mu nity-development/apply-for/engi neering-applications File: WPO202100038 Southwood Village 2 rev2 review comments 05-18-22.docx