HomeMy WebLinkAboutSUB199800025 Approval - County Stormwater Management Plan 1998-08-13ALBEMARLE COUNTY DEPARTMENT OF ENGINEERING
FAX TRANSMITTAL
to: Buddy Edwards
address: B. Aubrey Huffman & Associates
fax no.: (804) 979-1681 no. of pages: 3 (incld. cover)
date: 12 August, 1998
re: Porter Village
As requested, the pollutant removal requirement was discussed with staff and compared
with the purpose of the Water Protection ordinance. We decided that we would continue to
require stormwater management for this development.
Since this is an AHIP project and to avoid further delays, David Hirschman and I felt
obligated to be more active in resolution of this matter. So we made a visit to the site and
"brainstormed" alternative practices that would achieve the water quality goal. We resolved
that this could be accomplished by modifying the sediment traps to permanent BMP facilities
at the end of the project (refer to the attached sketches).
To expedite the process we thought that we'd attach the sketches to the E&S plan and
approve the plan with the attachments, rather than have the information drafted onto the
plan. The information would also be provided to the contractor with the permit. Please let us
know (either 1, David, or Kenny) by the end of the day if you have any concerns with
proceeding in this manner.
From the desk of....
Jack M. Kelsey, PE
Chief of Engineering
Albemarle County Engineering Department
401 McIntire Road
Charlottesville, Va. 22902-4596
(804)296-5861
Fax: (804) 972-4035
Sediment Trap To Stormwater BMP Construction Notes
1. All disturbed areas must be stabilized with pavement or a good stand of
vegetation prior to the conversion of the trap to a stormwater BMP.
2. Accumulated sediment must be removed from the trap to a depth 18" below the
stone weir (see detail), the interior slopes of the trap regraded to 3.1 or flatter,
and the stone weir repaired if necessary.
3. De -watering Trench shall be installed in accordance with the attached "Sediment
Trap to BMP Plan" and the "De -watering Trench Detail". Prior to installation, the
location and orientation of the trench shall be field determined by David
Hirschman (Water Resources Manager) and the Contractor.
4. After installation of the de -watering trench, the bottom of the stormwater BMP will
be covered with at least 6" of a 50/50 mixture of sand and soil, and then
permanent seed & mulch applied.
3: Efi1z6q Searre,
I
�ed�me �T 4o
u
de,-wa�'erir�9 �
4 rmc)n '
sed imeitTM - t ten? Vtmn,
solso soa\ ( 5ok
(Q�� �e.�era�C•ed
r r, 4-2 �n
(ANs�•O M-252
iDe -wakes►�,-T'Ye.n CL Dew•; I
c V%.-�. 5 . )
VAoT 4 5
Coarse, a9 M14t