HomeMy WebLinkAboutWPO201300079 Review Comments Stormwater Management Plan 2014-01-21�'IRGINZP
COUNTY OF ALBEMARLE
Department of Community Development
401 McIntire Road
Charlottesville, Virginia 22902
WPO Plan Review
Project: _5th Street Station —phase 2
Number: _wpo201300079
Date: _15 Jan 2013
Reviewer: Glenn Brooks Phone: 296 - 5832x3273
This is an abbreviated review comment notice. County engineering staff is available every Thursday
afternoon to discuss details of review. To schedule, please call your reviewer for an appointment.
Erosion & Sediment Control: Adequate
(Code Chapter 17, Article II) x Not Adequate
Y N
State standards followed, and Design Standards Manual notes and details
Adequate limits and perimeter measures out of work areas (stream areas
must be protected below walls. Not clear how this happens.)
All stages protected adequately (SF not adequate as a sole protection)
Adequate channels (not found in plan package)
- This plan shows only limits and fence. There do not appear to be any
sediment trapping measures shown.
- There is not enough protection for Moores Creek and the wall
construction
- Does not match swm plan.
Stormwater Management: Adequate
(Code Chapter 17, Article III)
X Not Adequate
O N
Enough capture and treatment for on -site areas
Enough detention storage for on -site areas
Sealed hydrologic and hydraulic computations provided
- System A +B areas should assume forested conditions prior to
development. The previous clearing was an unfinished project.
- All facilities, incl. level spreader, need maintenance access
- These are non - standard sand filters. Use state approved standards, or
provide DEQ approval for these systems at the desired removal
effeciency. Demonstrate WQV is captured in filters. Demonstrate
extended detention will not inundate filters. There is currently no way
to replace for rust, or easily inspect or clean, or replace media.
Design for these and provide structural certifications.
- The in- stream flow splitter is a clogging problem and the pond may be
below the water table. I just don't see this as approvable at all. Per
the zoning, build a in -line pond upstream of the culvert and pay the
Army Corps fees necessary for disturbance, or request a
variance/ZMA.
- Provide DEQ approval for the landfill pond.
- Provide scaled sections and profiles through facilities.
rer's Qeneric drawings are not
- The plans are too big for storage in county files. Please separate all
the computations into a sealed package. Clarify all storage volumes
used and assumptions and sizing, and outlet structures, after revised
hydrology per above. There were not enough plan details to verify
structures.
Mitigation: Adequate
(Code Chapter 17, Article 111)
x Not Adequate
Y N
• Buffers and disturbed areas adequately shown
• Adequate plantings at 2:1, or other mitigation provided
-A mitigation plan is required for all buffer disturbances. A plan has not
been received.
This review attempts to encompass the larger compliance questions. County staff does not assume
responsibility for any calculation or plan details, and cannot cover the intricacies of every plan submitted.
Each plan and calculation must have a professional seal and signature to assume these responsibilities.
This plan is
Approved (please see attached Approval Fact Sheet)
x Not Approved
WPO approval will be dependent on approval of all other plans for this site; site plan, road plan,
phase 1 erosion and sediment control, etc.