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HomeMy WebLinkAboutSP200700027 Review Comments 2008-01-07 (2) 81©_.. .vim County of Albemarle Department of Community Development Memorandum To: Joan McDowell,Principle Planner From: Glenn Brooks,County Engineer Date: 7 Jan 2008 'V Subject: Emmanuel Episcopal(SP2007000Xcritical 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: The primary areas are wooded slopes leading down to Stockton Creek's buffer and floodplain. (There is a minor area of critical slopes to be disturbed in the entrance on Rt. 250.) The applicant is proposing to place buildings and parking areas on the slopes,with steeper constructed slopes and retaining walls. Below is the area as shown on the county's aerial photographs: 1 lijitY-Sts 1 , ,bv's • ' rope. ,_ „ .,( .6... V 1.... Aso $11111 %,-,. IL. NI" -11 op pi!"--_,:#141„,„ iI4-7:see1/4.. \-11,4,.; .9 %V. • . . tivoir:. fit, .v,.;,-.1:1‘.4. , 44.4t.01.1. .. v, k v'4' X, ...'V %viz * ilit . % , } ,.. b,\--C: •. , Areas Acres Total site 11 acres(on church piece in red above) Critical slopes 1.8 16%of site Critical slopes disturbed 0.5 Approximated,see below Albemarle County Community Development Engineering Review comments Page 2 of 3 The applicant's request as asked for disturbance of no more than 2000 square feet of critical slopes. This is simply not possible. The placement of erosion control and construction will necessitate more disturbances. A marked-up copy of the plan is shown below with areas of disturbance which appear necessary. — e /7 , i- .,,,,,,. ,,,,,, \—@i--_,.7,;;;,„....,:H__ 7:--:imp____4(7.7-•_7Z... ,', )1 , Ar__..: --;:.. icii,, .,,:. , i. --L��i t ., J a - 1I /- may, 0� 1 4 /_ �a --t ----*--,..__ , - 6) ,sir . ,Ii..-— , "" t"'"-,4, 1- \!:1 •V.,''-----------------iti mil L v`! " 494yi .,:r \s,,,:_- -,..---Aks e:_ — i , , 7---=:1, " 7 ...----4-7Z4 r 4.\''''', ' HI, ' ,.4 7----1‘4,'.• 1 ..' tk. ', . -=.--„ . i , f,{� \fin'"-�._.+.\ 'I c-• 1�/. "- t/ 1 —t r III I w /" r\ y /� �'- L , Exemptions to critical slopes waivers for driveways, roads and utilities without reasonable alternative locations: The small disturbance in the entrance on Rt. 250 is exempt. Compliance with Zoning Ordinance 18-4.2: "movement of soil and rock" Temporary erosion control facilities will involve movement of soils on the slopes, impacting slopes and possibly Stockton Creek. "excessive stormwater runoff' The stormwater management concept could be improved. "siltation" Inspection and bonding by the County tries to ensure siltation control during construction. However, pulling back the development to allow erosion control without slope disturbance would be better. "loss of aesthetic resource" This area is visible from across Stockton Creek. Albemarle County Community Development Engineering Review comments Page 3 of 3 "septic effluent" I have not received any information regarding the septic system on the site. Based on the review above, there are no engineering concerns which prohibit the disturbance of the critical slopes as shown.