HomeMy WebLinkAboutWPO201800078 Review Comments WPO VSMP 2020-11-06John Anderson
From: John Anderson
Sent: Friday, November 6, 2020 4:26 PM
To: Andrew Allison
Subject: Planning Application Review for WP0201800078 Keswick Hall Spa - VSMP. [
Engineering review comments - Amendment #21
The Review for the following application has been completed:
Application Number = WP0201800078, Amendment #2
Reviewer = John Anderson
Review Status = Requested Changes
Completed Date = 11/06/2020
This email was sent from County View Production.
Andrew,
Please let me know if this less than formal (email) review format is acceptable.
CV review comments below [ WPO201800078 Amendment #21
1. C3.2: Label ST stone weir L x W dimensions, ESC Phase 2.
2. C3.3 ST2: Revise total storage required label to read 68.3 CY.
SOIL TYPE
-
518
so p
Ss
3. C6.1 permeable paver labels are somewhat confusing; label states 0 SF upgradient drainage. Compare with calculation
packet, p. 10 (VRRM.xIs, Tech Spec. 7, impervious cover credit 0.08 Ac., or 3,485 SF. It is not apparent which 3,485
SF area contributes to the permeable pavers. Also, please note that VRMM.xls indicates downstream practice to be
employed is 6.a. bioretention # 1. No downstream practice, other than underground detention, appears in -line with
permeable pavers. Please clarify, reconcile, revise labels, and update .XLS, as needed.
4. C7.1 Str. 108: Provide label requiring'h" steel plate in floor of MH structure, since vertical drop >4'.
5. Please compare C6.0 and C7.1 top of pipe elevations, 60" CMP storage system: 427.00' (detail, C6.0) vs. 427.11'
(C7.1). 180 LF (2 x 90') at 0.33% implies 0.3' fall over length of system; anticipate STR116A-SWM3 profile top of
pipe elev.=427.30' rather than 427.11'; similarly, pipe inv. elev.=422.30' rather than 422.11'. Please check elev.
/revise as needed.
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INV IN 73
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INV WT�IJ
OUT 423OZI0
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awou.11'
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ZIW DP
Ir HOPE
C 1.001E
I hope you are well —thanks for your help and patience.
best, J. Anderson
John E. Anderson, PE I Civil Engineer 11
Department of Community Development I County of Albemarle, Virginia
401 McIntire Road I Charlottesville, VA 22902
434.296.5832 ext. 3069