HomeMy WebLinkAboutSDP201100011 Review Comments Critical Slope Waiver 2011-03-17*-&A
County of Albemarle
Department of Community Development
Memorandum
To: Megan Yaniglos, Current Development planning and zoning review
From: Max Greene, Current Development engineering review
Date: 17 March 2011
Subject: Blue Ridge Swim Club (SDP201100011) 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 an existing member based swimming facility next to a drinking water shed stream. The critical
slope disturbance is for the installation of a 2" septic discharge line to a new drain field location. The
proposed drain field location is out of the stream buffer. Current type and location of septic treatment is
unknown at this time.
Areas
Acres
Total site
13.2 acres approximately
Critical slopes
1.6
,of site
Critical slopes disturbed
.04
12.4% of critical slopes
Exemptions to critical slopes waivers for driveways, roads, and utilities without reasonable
alternative locations:
This disturbance is not exempt as shown. Two alternative routes exist to the proposed drain field area.
One is a perpendicular critical slope crossing and the other follows the existing access way. The existing
access way is also in the stream buffer, so the perpendicular critical slope crossing appears the best choice.
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 drain into the pool area.
"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 not visible from the roads and houses in the neighborhood. These slopes appear natural
and will not be changed by the pipe installation.
"septic effluent"
This neighborhood is not serviced by public sewer.
Based on the review above, there are no engineering concerns which prohibit the disturbance of the critical
Albemarle County Community Development
Engineering Review comments
Page 2 of 2
slopes, but recommend a perpendicular slope crossing to minimize disturbance. Recommend utilizing
disturbance to replace the existing walking trail from the upper parking area to the pool area with steps.
Engineering recommends approval in order to protect the stream from the existing septic discharge.
file: E1_csw_MRG_Blue Ridge Swim Club.doc