HomeMy WebLinkAboutSDP200500123 Review Comments 2005-12-12�uA'i
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County of Albemarle
Department of Community Development
Memorandum
To: Bill Fritz
From: Max Greene
Division: Current Development, Engineering Plan Review
Date: 09 December 2005
Subject: The Woodlands (SDP 200500123) 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 site has Approximately 3 acres of existing critical slopes. Approximately .5 acres appears to have been
created during previous construction of both the State Route named Sunset Avenue and the adjoining
apartment complex. The remaining 2.5 acres of existing critical slopes appear to be natural. Critical slope
are disturbed to install retaining walls, grading to install travel ways and parking, and to create areas for
dwellings, recreation, and stormwater facilities.
Areas
Acres
Total site
24.08
Critical slopes
3.0
12.5% of site
Critical slopes disturbed
2.7
90% of critical slopes
Exemptions to critical slopes waivers for driveways, roads and utilities without reasonable alternative
locations:
There are alternative alignments and connections to the existing roadways that may not affect the critical
slope to the extent proposed by this plan.
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 attenuated to release at a predevelopment rate, but the volume will be
significantly increased in this area. Runoff will be controlled by the drainage plan proposed.
"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"
Approximately half of the critical slopes are proposed to be replanted to restore some of the sites
natural character. 10'to 20'+ retaining walls surround the site.
"septic effluent"
This is not a concern, as public sewer will service the site.
Based on the review above, there are engineering concerns with the disturbance of the critical slopes as
shown. The existing platted Right of Way through the site makes the required connections to existing
roadways without the extent of critical slope disturbance as proposed.