HomeMy WebLinkAboutWPO201900062 Review Comments WPO VSMP 2020-10-060
COUNTY OF ALBEMARLE
Department of Community Development
401 McIntire Road, Room 227
Charlottesville, Virginia 22902-4596
Phone (434) 296-5832 Fax (434) 972-4126
VSMP Permit plan review
Project title: Southwood Redevelopment — Village 1
Project file number: WP0201900062
Plan preparer:
Timmons [craig.kotarski@timmons.com]
Owner or rep.:
Southwood Charlottesville LLC [drosensweig@cvillehabitat.org]
Date Received:
11 November 2019
(Rev. 1)
9 April 2020
(Rev. 2)
5 June 2020
(Rev. 3)
10 September 2020
Date of comments:
13 December 2019
(Rev. 1)
14 May 2020
(Rev. 2)
1 July 2020
(Rev. 3)
6 October 2020
Reviewer:
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 application may be resubmitted for approval if all of the items
below are satisfactorily addressed. 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 Form. (Rev. 1) Comment addressed.
2. Provide a signed Certification. (Rev. 1) Comment addressed.
3. Include the information on impaired waters in section 7. (Rev. 1) Comment addressed.
Revision 1 comments
4. The proposed area of disturbance is listed differently throughout the SWPPP and plans (12.88 ac. on
the Registration Statement, 15.58 ac. in the Nature of Activity, 15.04 ac. in the VRRM not including
forest and open space). Please revise to have the same acreage. (Rev. 2) 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)
Engineering Review Comments
Page 2 of 4
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. A FDP permit application and a Flood Study will need to be submitted and approved [18.30.3.12,
18.30.3.13]. (Rev. 1) Comment not addressed. (Rev. 2) Comment not addressed, response
noted. (Rev. 3) The FDP is still under review.
2. This plan cannot be approved until the 1.84 1b y 1.38 lb 1.32 lb/yr of nutrient credits have been
purchased. Please contact Ana Kihner prior to purchasing credits. (Rev. 1) Comment not
addressed. (Rev. 2) Comment not addressed, response noted. (Rev. 3) The credits will need to
be purchased before a permit can be issued.
3. Please contact Ana Kilmer to complete a Stormwater Management Facilities Maintenance
agreement. (Rev. 1) Comment addressed, the agreement will need to be recorded prior to
approval. (Rev. 2) Response noted. (Rev. 3) Comment addressed, recorded in DB 5386 p. 659
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. (Rev. 1) Response noted.
5. Show and label all proposed easements on the plans, including facility and access easements. (Rev.
1) Comment partially addressed. Revise the easement linetype so it shows up clearer. Show
easements on the entrance culvert, structure 600 on the entrance road, and on the
structures/pipes in the parking lots of the proposed apartment buildings (others may not be
listed). (Rev. 2) Comment addressed.
6. Clearly show and label how the bioretention will be accessed for maintenance. (Rev. 1) Comment
partially addressed. The maximum slope for a grassed access is 20%, please revise. [Design
Standards Manual] (Rev. 2) Comment not addressed, scaling the contours shows a 25 % slope.
(Rev. 3) Comment addressed.
7. Include the bioretention maintenance and inspection schedules from DEQ BMP Spec. 9 on the plans.
(Rev. 1) Comment addressed.
8. Include the planting plans for the bioretention. (Rev. 1) Comment partially addressed. Only one
bioSlter shows any plantings on the landscape plan. Provide separate details/tables for the
bioSlter plantings following the requirements in DEQ BMP Spec. 9 sections 6.8 and 6.9. (Rev.
2) Comment not addressed, separate biofilter requirements and proposed landscaping were
not found on the landscape sheets. Bioflter 1 does not show up fully on the sheets. (Rev. 3)
Comment addressed.
9. Provide the routing calculations for the bioretention. (Rev. 1) Comment addressed.
10. Show and label the pre-treatment requirements for the level 2 bioretention on the plans. (Rev. 1)
Comment partially addressed. Show and label both of the two required pre -treatments for
each Level 2 biofilter. Include the size of the pre-treatment cells. [DEQ BMP Spec. 9, Table 9.3
and Section 6.4] (Rev. 2) Comment partially addressed, I did not see the size of the cells on the
plans. (Rev. 3) Comment addressed.
11. Provide more detail on the path through bioretention 2. (Rev. 1) Comment addressed.
12. Include the County As -built requirements on the plans. (Rev. 1) Comment not addressed. Include
the VSMP As -built requirements. (Rev. 2) Comment addressed.
13. On sheet C6.0, include a breakdown of the proposed and conceptual impervious areas in each
biofilter drainage area. (Rev. 1) Comment addressed
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 I % is being met. (Rev. 1) The provided DA map appears to be incorrect. Areas are included
that enter the stream below the proposed outfall and areas that drain to the other side of the
Interstate. I've attached a printout from County GIS showing the drainage area at the pipe
outfall. (Rev. 2) See comments below.
Engineering Review Comments
Page 3 of 4
15. Contact the Army Corp and provide correspondence allowing the outfall into the stream. (Rev. 1)
Comment not addressed, response noted. (Rev. 2) Comment not addressed, response noted.
(Rev. 3) Comment addressed.
Revision 2 comments
16. The 1-yr flows on the table on sheet C6.00 do not add up to what is shown for the total (it looks like
the 0.32 should be 0.23) (Rev. 3) Comment addressed.
17. Provide the 10-yr routing for the storage pipe and for the whole system. (Rev. 3) Comment
addressed.
18. Provide more detail on the storage pipe, such as a detail of the weir wall. Ensure maintenance access
to both sides of the weir wall, at the weir wall. (Rev. 3) Comment addressed.
19. The storage pipe easement may need to be greater than 20' Use the calculation from the Design
Standards Manual to determine the easement width (Width = Pipe Diameter+ 2'(Depth to bottom of
pipe — 5') + 10'). The easement over the pipe should also be labelled as a Stormwater Facility
Easement, as it's addressing the DEQ quantity requirement. (Rev. 3) Comment addressed.
20. After considering the larger than usual drainage area to Bioretention #1, provide a flow splitter prior
to the outlet to allow only the Treatment Volume to enter the facility (and any additional amount in
order to meet Energy Balance). [DEQ BMP Spec. 9, Section 6.5] (Rev. 3) Comment addressed.
21. Provide more separation between Pipe 201 and Pipe 105/Structure 104. 10' is preferred. (Rev. 3)
Comment addressed.
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.
Revision 1 comments
2. Provide a sediment trap for the grading on the northeast side of the entrance. The final grading
should also be revised to direct the runoff to the culvert instead of having channelized runoff flowing
into the road. (Rev. 2) Comment addressed.
Revision 2 comments
3. It appears the outlet pipe for Sediment Basin 1 is shown going under Old Lynchburg Road. Please
revise to stay out of the public road and show the existing road more clearly on the plans. (Rev. 3)
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;
Engineering Review Comments
Page 4 of 4
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;
ht!p://www.albemarle.oriz/dgptforms.aW?department=cdenizwpo
11900062 Southwood Village 1 rev3 comments 10-02-20.doc