HomeMy WebLinkAboutWPO201900062 Correspondence 2020-04-09 (2). •#��0
i 0® 608 Preston Avenue
P 434.295.5624
T I M M O N S GROUP Suite 200 F 434.295.1800
Charlottesville, VA 22903 www.timmons.com
April 7, 2020
Matt Wentland
Albemarle County Community Dev.
401 McIntire Rd, Rm. 227
Charlottesville, VA 22902
RE: Southwood Redevelopment — Village 1- VSMP Permit Plan Review — WP0201900062 -
Comment Response Letter
Dear Mr. Wentland:
We have reviewed all of your comments from December 13, 2019 and made the necessary
revisions. Please find our responses to the comments below in bold lettering.
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 Form.
A signed Registration Form has been included in the SWPPP.
2. Provide a signed Certification.
A signed Certification has been included in the SWPPP.
3. Include the information on impaired waters in Section 7.
The TMDL Report for Moores Creek has been included in the SWPPP.
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.
Acknowledged.
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 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.
ENGINEERING I DESIGN I TECHNOLOGY
1. A FDP permit application and a Flood Study will need to be submitted and approved
[18.30.3.12, 18.30.3.13].
Acknowledged. A flood plain permit will be submitted/approved prior to the VSMP and final
plat approval.
2. This plan cannot be approved until the 1.84 Ib/yr of nutrient credits have been
purchased. Please contact Ana Kilmer prior to purchasing credits.
Acknowledged. We have reached out to Ana Kilmer in regards to purchasing nutrient credits.
Note that with the revised routing, 1.38 Ib/yr of nutrient credits is required.
3. Please contact Ana Kilmer to complete a Stormwater Management Facilities
Maintenance agreement.
We have reached out to Ana Kilmer to complete a Stormwater Management Facilities
Maintenance agreement.
4. The Forest and Open Space Easement, SWM Facility easements and Mitigation
easement will need to be shown on the Final Plat and a Deed of Dedication will need to
be signed and recorded for this easement. The Deed will be filled out by the County and
forwarded to the applicant when the plat is nearing approval.
Acknowledged.
5. Show and label all proposed easements on the plans, including facility and access
easements.
All easements have been shown and labeled on the Grading and Drainage Plan on sheets
C4.05-C4.08.
6. Clearly shown and label how the bioretention will be accessed for maintenance.
An access easement has been added in the vicinity of pipe 201.
7. Include the bioretention maintenance and inspection schedules from DEQ BMP Spec. 9
on the plans.
DEQ BMP Spec. 9 maintenance and inspection schedules have been added to the Stormwater
Summary on sheet C6.01.
8. Include the planting plans for the bioretention.
A planting plan has been added for the bioretention. See sheet L1.01 and L1.02.
9. Provide the routing calculations for the bioretention.
Bioretention routing calculations have been included in the calculation book.
10. Show and label the pre-treatment requirements for the level 2 bioretention on the
plans.
Gabion basket forebay wall details have been added to sheet C6.00.
11. Provide more detail on the path through bioretention 2.
Bioretention 2 has been relocated and revised.
12. Include the County As -built requirements on the plans.
The As -built Road Plan policy has been added to the Notes and Details on Sheet C1.00.
13. On Sheet C6.0, include a breakdown of the proposed and conceptual impervious areas
in each biofilter drainage area.
The proposed and conceptual impervious areas have been labeled for each drainage area on
sheet C6.00.
14. Show more detail for the outfall into the stream. Include the stream banks, as it will
need to outfall directly in the stream to not use energy balance. Include a drainage area
map for the stream to show the 1% is being met.
Outfall location has been revised. 1% drainage area map has been added to plans on sheet
C6.02.
15. Contact the Army Corp and provide correspondence allowing the outfall into the
stream.
We have reached out to the Army Corp pertaining to the outfall into the stream.
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.
1. The ESC portion appears acceptable at this time.
Acknowledged.
We have included PDF copies of the plans and calculations for your review. If you have any
questions or comments, please feel free to give me a call at 434.295.5624.
Sincerely,
Clint Shifflett, PE
Project Manager