HomeMy WebLinkAboutSDP200800119 Review Comments Critical Slope Waiver 2009-10-07*—&A
County of Albemarle
Department of Community Development
Memorandum
To: Summer Frederick, Current Development planning and zoning review
From: Max Greene, Current Development engineering review
Date: 7 October 2009
Subject: Treesdale Park (SDP200800 1 1 9) critical slope waiver request
The critical slope waiver request has been reviewed. The engineering analysis of the request follows:
Description of critical slope area and proposed disturbance:
This is a drainage ravine and what is left of a low area between two roads. The applicant is proposing to
pipe the drainage and fill in the area to make a flat field with a 2.5 or 3:1 slope at the edge.
Areas
Acres
Total site
6.595 acres approximately
Critical slopes
1.3
19.7% of site
Critical slopes disturbed
0.32
24.8% of critical slopes
Exemptions to critical slopes waivers for driveways, roads and utilities without reasonable
alternative locations:
Driveways, roads are not proposed within the critical slopes. Utilities do not have an alternate location
outside of the critical slopes and are exempt.
Compliance with Zoning Ordinance 18 -4.2:
"movement of soil and rock"
Proper slope construction, control of drainage, and vegetative stabilization will prevent any movement
of soil.
"excessive stormwater runoff'
Stormwater runoff will be reduced in this area, as the slopes will be eliminated and stormwater
controlled and directed into a stormwater maintenance facility.
"siltation"
Inspection and bonding by the County will ensure siltation control during construction. Proper
stabilization and maintenance will ensure long term stability.
"loss of aesthetic resource"
This area is visible from the rear of several houses in the neighborhood. A tree preservation area is
proposed below the retaining walls in the rear of the site and the vegetation should buffer the view of
the buildings as well as the retaining walls.
"septic effluent"
This neighborhood is serviced by public sewer.
Based on the review above, there are no engineering concerns which prohibit the disturbance of the critical
slopes as shown.
file: CDEl csw MRG Treesdale Park.doc