HomeMy WebLinkAboutWPO201200066 Review Comments Erosion Control Plan 2012-08-10i"
,. `IRGINZP
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: Erosion and Sediment Control for Borrow Area at Ragged Mountain Dam
WP0201200066
Plan preparer: Dominion Engineering [fax 978 -1444]
Owner or rep.: City of Charlottesville [fax 979 -74431
Plan received date: - -July 2012
Date of comments: 10 August 2012
Reviewer: Max Greene
The Erosion and Sediment Control Plans (WP0201200066) submitted -- July 2011 have received
Engineering Review and do not appear to meet Albemarle County minimum checklist items for
approval. Please adequately address the following comments for final approval:
1. Please show limits of disturbance for this portion of the overall project.
2. Please update sheet ES4 for the basin design volumes to match the calculations in the rest
of the proposal.
3. ST2 & ST3 drainage areas appear difficult for the contractor to construct/maintain. Why
is there a diversion proposed across the middle area of the slope? If the diversion should
fail during a large rain event, the traps will not be sized to adequately contain the runoff.
4. This office recommends turbidity curtains for added protection during the construction of
the sediment traps/basins.
5. Diversions should lead into the traps/basins instead of across the dams. The inflow to
outflow ratio should be @ 3:1 to meet the State Minimum Standards for design.
6. SB -1 schematic needs the base dimensioned for construction.
7. SB -1 wood baffle does not appear to be in the proper location per Std. & Spec. 3.14
design requirements. Baffle does not appear to create the 3:1 ratio required.
8. The County Engineer recommends updating the topography to show what has changed in the area
prior to this approval.
Once these comments have been addressed, please submit 2 copies (add 1 more copy if VDOT needs to
review, and 1 more if mass - grading that Planning needs to review) of the revised plans, calculations, and
narratives to Current Development Engineering along with the required review fee and transmittal form.
Current Development Engineering is available from 2:30 -4 PM on Thursdays to discuss these review
comments. Please contact Max Greene at 434 - 296 -5832 ext. 3283 or email m .-reene @albemarle.orc to
schedule an appointment.
[17- 204.f] An application for an erosion and sediment control plan that requires modifications, terms, or conditions to be
included in order for it to be approved shall be deemed to be withdrawn if the owner fails to submit a revised plan addressing the
omitted modifications, terms or conditions within six (6) months after the owner is informed of the omitted information as
provided under paragraph (B).
File: CDD1_esc_MRG_Ragged Mauntain Dam Borrow Area.doc