HomeMy WebLinkAboutWPO201300052 Review Comments Stormwater Management Plan 2014-05-01� OF AL
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COUNTY OF ALBEMARLE
Department of Community Development
401 McIntire Road, Room 227
Charlottesville, Virginia 22902 -4596
Phone (434) 296 -5832 Fax (434) 972 -4126
Project: Old Trail Village, Block 1B & 3C
Plan preparer: Roudabush, Gale & Assoc., Inc [914 Monticello Road, Charlottesville,
VA 22902, cmulligan @roudabush.com]
Owner or rep.: JA -ZAN LLC [1150 Pepsi Place, Charlottesville VA 22901,
dave @ oldtrailvillage.com]
Plan received date: 15 April 2014
Date of comments: 01 May 2014
Reviewer: Glenn Brooks, John Anderson
A. Stormwater Management and Mitigation Plan (WP0201300052)
1. Separate out the WPO plans. They cannot be approved as part of a road plan or site plan set.
2. These plans indicate the off -site pond across Old Trail Drive will provide stormwater management.
This is fine as long as this plan gets runoff and discharge to that location. Please provide current
plans and profiles for the complete pipe run to the pond, indicating accurate current elevations of
ground, road, road substructure, and pond in the 2 and 10 year storms. This must be included fully
on this plan, to be bonded with this plan. The pipe run cannot decrease in size as indicated on
sheet 16. It appears the entire run should be 42" diameter.
3. Please clarify and provide inlet computations for existing inlets that are receiving flow from this
development. Also, the tables do not appear to be clearly separating sump and on -grade inlets (see
VDOT LD -204). Please ensure all drainage inlets will capture the 10 year storm to carry runoff to
the stormwater management pond. Please clarify which pipes are existing (13,46) The Storm
Sewer Design table appears to indicate capacity issues, for example: from Ex. 106 to Ex. 108,
from Ex. 114 to Ex. 116, and 7 other pipe sections. Please review and revise as necessary.
B. Erosion Control Plan (WP0201300052)
1. Separate out the WPO plans. They cannot be approved as part of a road plan or site plan set.
2. Provide clear limits of disturbance.
Provide perimeter controls for the initial stage of construction. The plan shows only inlet
protection. Inlet protection cannot be installed until the drainage system is installed. This is too
late.
4. The pipe run to the pond must be included. Show all measures to install the pipe run to the pond.
5. The plan note on sheet 9, note 1 on the sequence, and sheet 16, indicate an outfall into a sediment
basin. This sediment basin is not part of this erosion control plan as shown. It cannot be
Engineering Review Comments
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considered, as it may be removed with other plans. All controls must be shown and detailed on the
plan, and within the limits of disturbance.
6. Update the narrative. This plan has not proposed any checkdams or basins.
7. Revise the sequence of construction. Item #1 is not valid. Item #7 appears to be a carryover from
prior plans. Item #2 is not possible, as many inlets have yet to be installed.
C. Road plans
We are awaiting a subdivision application and fee for the Ashlar Avenue road plans. This was
conveyed in an e -mail on 17 Apr 2014.
D. Site Plan (SDP201300044)
Comments as posted to County View system on 3/25/14. Previous comments from Michael Koslow
appear to be addressed with this submittal. However, there are still outstanding issues with WPO plan.
Remove the WPO and road plans. They cannot be approved as part of a site plan set.
E. Final Plat (SUB201400065)
A complete review of the final plat will be performed when road, site and WPO plans are approved,
and can be matched against the final plat. The following preliminary comments are provided;
1. Easements will need to be recorded for drainage through lots and to the off -site pond.
2. A maintenance agreement will need to be in place for the pond. A copy of a recorded document
should be provided to verify.
3. A Lickinghole Basin pro -rate share fee will be computed with final approval, and this will need to
be paid.
4. Road plans will need to be approved.
5. Bonds will need to be posted. Bond estimate can be requested when plans are approved. Forms
are available on the county website.
File: WPO201300052 -01d Trail- 050114 - memo.doc