HomeMy WebLinkAboutWPO201700076 Review Comments WPO VSMP 2018-02-01 Dewberry Dewberry Engineers Inc. 804.290.7957
4805 Lake Brook Drive,Suite 200 804.290.7928 fax
Glen Allen,VA 23060 www.dewberry.com
February 1,2018
County of Albemarle,Department of Community Development
Attn: David James,VSMP Reviewer
401 McIntire Road, Room 227
Charlottesville,VA 22902-4596
RE: UVAF Temporary Golf Course Connector Road
2°d Submission—Including Responses from 1st Submission
Project File Number:WPO2ol7o0076
Dear Mr.David James,
On behalf of the University of Virginia Foundation,Dewberry Engineers Inc.is pleased to submit for your
review and approval the final plans for the UVAF Temporary Golf Course Connector Road. Two(2)copies
of the Final Design(100%)plans signed February 1,2018 are being submitted for your review. Below are
the comments along with responses that were received from your review dated December 27,2017.
A. Stormwater Pollution Prevention Plan(SWPPP)
1. Please add WPO number(WPO2oi700076)to SWPPP cover sheet.
Dewberry Response:The WPO number has been added to the SWPPP cover sheet.
2. Insert copy of General Permit coverage when obtained.
Dewberry Response:Acknowledged.
B. Pollution Prevention Plan(PPP)
1. Show proposed construction entrance,staging,stockpile,borrow,fueling,waste disposal,
concrete washout areas on the PPP.
Dewberry Response:The PPP has been updated to include the above areas.
C. Stormwater Management Plan(SWMP)
1. Cover Sheet-
a. Add WPO number WPO2o17oo076 to cover sheet title
Dewberry Response:The WPO number has been added to the cover sheet title.
b. Remove signature block from cover sheet
Dewberry Response:The signature block has been removed from the cover sheet.
2. Provide design details on the`Detention Basin'.Should be sized to handle the design storms.
Dewberry Response: Details and computations for the detention basin have been added to
sheet C9.11.
3. Provide a level spreader or gravel diaphragm design at end of basin outfall 1-4,or extend
the outfall channel protection to the natural channel outfall downstream.
Dewberry Response: A gravel diaphragm has been sized and designed for outfall 1-4.See
sheet C7.o2 for the plan view and sheet C.10.01 for the construction detail.
4. C9.o3 Bioretention Facility(VADEQ SW Design Spec 9)—
a. Provide testing of underlying soils—1 per i000 sf of filter surface(Section 6.2).
Dewberry Response:Test holes are currently being scheduled and will be completed prior
to construction. Results will be submitted to the County and should any changes be
necessary they will be made under separate cover.
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NVWOK ' V
Mr.James
UVA Foundation-Temporary Golf Course Connector Road
W PO201700076
February 1,2018
b. Show filter fabric only on the sides of BMP. Use a layer of coarse washed choker stone
on bottom instead.
Dewberry Response:The bioretention detail has been revised to only show filter fabric on
the sides of the BMP and above the underdrain.A 3"layer of choker stone is included
below the filter media and above the underdrain.
c. Provide a planting plan or template to be used.Specify sources of plant species,planting
sequence including post-nursery care and initial maintenance requirements(Section
6.8)
Dewberry Response:A planting plan has been developed for the bioretention,see sheet
C11.oi.
d. Include notes on installation.Fig 9.16(Section 8.2).
Dewberry Response: Bioretention installation notes and the Figure 9.16 from the DEQ VA
SWM Spec 9 have been included on sheet C9.o3.
5. C9.o4—Show Tc flow paths with lengths, Tt of each.
Dewberry Response:Tc paths have been added and labelled with lengths and Tt on sheet
C9.o4.
6. Provide profiles of all proposed utilities.
Dewberry Response: Utility test holes are currently being performed. Upon review of data,
any proposed utility relocations will be submitted under separate cover.
7. Show SWM facility&access easement over all facilities,and associated structures to outfall
I (Design Manual,Sect.5)
Dewberry Response: SWM facility easements have been added around both the bioretention
facility and outlet structure and the detention basin and outlet structure.Please note that the
easements are been finalized and submitted under separate cover along with agreements.
8. Submit an Easement Plat and Deed of Dedication and Easement for the SWM facilities&
access.
Dewberry Response: Easement Plats and Deed of Dedication and Easement for the SWM
facilities will be completed and submitted under separate cover.
i
D. Erosion and Sediment Control Plan(ESCP)
1. Please show the steep slopes.Show all existing easements with deed book references,
locations,and dims.
Dewberry Response: See sheet C8.o1 and C8.o2 for the existing steep slopes and easements.
2. Provide E&SC details sheet(Paved CE,CD,IP,OP,etc)
Dewberry Response: E&S details for E&S measures used on this project have been added to
! sheet C8.o6.
3. Provide OP shape&stone size calcs(see VADEQ ESC HB Spec 3.18)
Dewberry Response: See sheet C8.o4 for outlet protection sizing.
`''1 Dewberry
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41111.100/ katrod
Mr.James
UVA Foundation-Temporary Golf Course Connector Road
WPO201700076
February 1,2018
4. C7 o2—For 1-3 use an outlet structure that withdraws water from the surface when
discharging from basins.
Dewberry Response:The outlet structure, 1-3,is designed for a dry facility with an orifice on
the bottom of the pond to allow for complete drainage of the facility.
5. Provide low maintenance ground cover where grades are steeper than 3:1.
Dewberry Response: Slopes greater than 3:i have been hatched on sheet C8.o4 and low
maintenance seed requirements have been provided on sheet C8.o6.
This letter is provided as part of the resubmittal process and addresses all of the comments above.If you
have any questions or require clarification,please call(8o4)-2o5-334o,or email by
mthomasndewberry.com.
Sincerely, Prov jJ @ /7/1441';,0 ,,A'#11^�
.ri'!ti' • Vc. p
Matt C.Thomas,P.E. J
Project Manager
Dewberry
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