HomeMy WebLinkAboutSUB200800138 Review Comments Critical Slope Waiver 2008-07-10ALg�,��
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COUNTY OF ALBEMARLE
Department of Community Development
401 McIntire Road
Charlottesville, Virginia 22902 -4596
Phone (434) 296 -5832 Fax (434) 972 -4126
To: Patrick Lawrence, Current Development Planner
From: Phil Custer, Current Development Engineer
Subject: SUB - 2008 - 00138, Westhall Subdivision Ph. V, Critical Slope Waiver Request
Date received: 30 June 2008 (critical slope document date 24 June 2008)
Date of Comment: 10 July 2008
The request for a waiver to develop on areas of critical slope for grading incorporated with the new
construction proposed on TMP- 56H -AO was received on 30 June 2008.
It should be noted that a critical slope waiver for this project was previously approved by the Planning
Commission with the review of a preliminary plat (SUB- 2007 - 00037) that was withdrawn immediately
prior to the applicant's "Final before Preliminary" submittal. Disturbances to critical slope areas have been
slightly modified since the first waiver approval was granted.
The engineering analysis of the request follows:
Description of critical slope area and proposed disturbance:
The critical slope area, within TMP 56H -A0, appears to be both natural slopes and man -made slopes
created with the required improvements for Westhall Subdivision Phases 1 -4. The critical slope
disturbances are typical for subdivision construction: single family residences, roads, stormwater facilities,
and water and sanitary sewer lines.
This plan also includes off -site work on TMP 56 -53 to upgrade the embankment of an existing farm pond
to the proper standards for use as a SWM facility.
Areas
Acres
Total disturbed areas
10.707
Critical slopes (man-made &
natural)
Man -made = 0.358
Natural = 0.201
3% of development
2% of development
Critical slopes disturbed
Man -made = 0.358
Natural = 0.089
100% of man -made
45% of natural slopes
Below, each of the concerns of Zoning Ordinance section 18 -4.2 is addressed:
1. "movement of soil and rock ": Proper slope construction, control of drainage, and vegetative
stabilization with approved erosion control measures constructed within the standards of
Virginia Erosion and Sedimentation Control Regulations will prevent any movement of soil.
2. "excessive stormwater run - off ": Stormwater runoff will be controlled by the drainage /
Albemarle County Community Development
Engineering Review comments
Page 2 of 2
stormwater management plan required for this site.
3. "siltation of natural and roan -made bodies of water ": There is an existing stream located on
the western half of the property. Inspection and bonding by the County will ensure siltation
control during construction. Proper stabilization and maintenance will ensure long term
stability.
4. "loss of aesthetic resource": This site is visible from the other previously approved sections
of the Westhall Subdivision. It is also visible from other neighboring properties. It appears
that the loss of aesthetic resources will be necessary with the proposed plan.
5. "septic effluent ": No septic systems or drainfields are proposed in this project. This site is
accessible to the public sanitary sewer system.
Based on the above review, there are no engineering concerns which prohibit the disturbance of the critical
slopes as shown on the plans.
Copy: SUB - 2008 - 00138, Westhall Subdivision Phase V Final Plat (before preliminary)
File: El csw PBC 08 -138 Westhall Subdivision Phase V Lots 93 -125