HomeMy WebLinkAboutSDP201400034 Review Comments Erosion Control Plan 2014-04-11� 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: Northtown Phase HA
Plan preparer: Collins Engineering [scott @collins- engineering.com]
Owner or rep.: Gold Leaf Land Trust [PO Box 1333 Charlottesville VA 22902]
Plan received date: 1 Apr 2014
Date of comments: 11 Apr 2014
Reviewer: Glenn Brooks
Site Plan Amendment (SDP01400034)
1. The plan must represent actual site conditions. Please update.
2. The only pertinent details to this amendment appear to be on a stormwater management plan stapled to
the back of this site plan. This is not a stormwater management plan review. That requires a WPO
application. Please place wall and slope information on the site plan. Please remove the stormwater
management plan. Please indicate all changes on the site plan. Bubbled areas appear to be from a
previous amendment.
3. All existing wall construction should be certified as to as -built structure and methods by an engineer,
including walls to either side of the failure area. Provide a current original certification and evidence
of inspections.
4. In the failure area, the block layer laid on the failed slope as a quick -fix is a potential slip plane and
should be removed or broken up. Similarly, the existing wall should also be removed so the slope can
be tied into the existing fill. Placing fill against existing walls may create erosion problems or a gap
form between fill and wall over time. A stone layer between fill areas prevents proper tie -in. Toe
drains and graded filters for draining the slope should be specified, tested and certified by a
geotech. The slope should be benched into the existing soil, or some sort of structural tie used through
old and new fill.
5. The guardrail should be included in details with embedment and position dimensioned.
6. The problems with the biofilter not draining properly must be resolved, as this may be contributing to
structural failure. It is possible that the wrong filter fabric was used, or there is a failure in the
underdrain system. This must be investigated and certified.
Erosion Control Plan (WP0201400029)
1. There do not appear to be any sheets for erosion and sediment control on this plan. It is titled a site
plan amendment of ten sheets, with bubbles around items that appear previously built. There is a
storm water management plan, sheet 1 of 1, stapled on the back. This appears to have some details.
Please provide an erosion and sediment control plan, and omit all the other stuff. It must be a stand-
alone plan, not part of the site plan.
2. An updated permit from the Army Corps will be needed for any additional stream disturbance. Please
provide a copy with your submittal.