HomeMy WebLinkAboutWPO201800078 Approval - County 2020-05-06COUNTY OF ALBEMARLE
Department of Community Development
401 McIntire Road, Room 227
Charlottesville, Virginia 22902-4596
Phone (434) 296-5832 Fax (434) 972-4126
VSMP Permit Plan Review - Amendment
Project title: Keswick Hall Spa — WPO Amendment 1
Project file number: WP0201800078
Plan preparer: Timmons Group, Craig Kotarski, P.E. craig.kotarski(&timmons.com
Owner or rep.: Historic Hotels of Albemarle, LLC, John Trevenen jtrevenen@keswick.com
Plan received date: 6 Jan 2020
(Rev. 1) 2 Apr 2020
Date of comments: 15 Jan 2020
(Rev. 1) 6 May 2020 — Approved
Reviewer: John Anderson
County Code section 17-410 and Virginia Code §62.1-44.15:34 requires the VSMP authority to act on any
VSMP permit by issuing a project approval or denial. This project is approved. Note: Albemarle
/Engineering anticipate revised SWM Facility easement plat submittal in the near future.
C0.0
1. In text box /lower left, ref. 5/21/19 purchase of 1.09 lb. phosphorus nutrient credits, which, combined with
on -site BMPs, met WP02018-00078 phosphorus load reduction requirement of 1.65 lb. Amendment 1
total phosphorus load reduction reduces the initial 1.65 lb. requirement to 1.28 lb. A surplus, —
(on -site BMPs provide 0.55 lb.) is available to Keswick Hall for future development. A note is
recommended as CDD has no reliable means to track on -site phosphorus credits that accrue from
Amendment 1. CDD urges Applicant to rely on credits purchased, and Amendment BMP design; these
combined exceed 9VAC25-870-65 requirements, and yield a 0.36 lb. surplus. (Rev. 1) Addressed. A note
re..36 lb. surplus accompanies Water Quality Analysis (WPO Plan Amendment #1) text block, sheet C6.0.
Note: Amendment (on -site) BMP provides 0.55 reduction. Initial on -site BMP design provided 0.56 lb./yr.,
which, combined with 1.09 lb/yr. purchase, met 9VAC25-870-65 requirements.
2. Revise Plan title (line 2) to: WPO Plan Amendment 1. (Rev. 1) Addressed.
3. Ensure C3.0 project description LOD (2.60 Ac.) and plan labels are consistent (during 1115 meeting,
discussed possible revision to LOD). (Rev. 1) Addressed.
4. Note: Initial ESC Plan bond amount is based on 2.67 Ac. LOD, 1 sediment trap (2.10 Ac. DA), 340 LF of
diversion dike. Amendment 1 ESC plan requires 2 STs (2.82 Ac. DA z $ expense), and 1,280'f diversion
dike ($5,170 increase). Current ESC plan bond incl. $3,987.95 (10% contingency), sufficient to meet
required (Amendment) ESC plan bond amount (C3.1). (Rev. 1) Addressed. Applicant response (3/31/20
letter): `Acknowledged. Bonds to remain in place if they are sufficient.' Existing bond amount suffices.
5. Note: Initial SWM Plan bond is based on 2 detention systems, while Amendment 1 proposes a single,
slightly larger DIA and longer detention system. Applicant may request a bond reduction based on
difference in installed expense (material /labor + contingency) between 2 facility and 1 facility designs. A
bond inspection request form and revised, design- and Mfr.-furnished estimate of installed expense of
larger /longer single detention vs. two -system detention would be required in order to process SWM plan
bond reduction request. Likewise, there appears to be a reduction in permeable paver qty., a bonded SWM
line item. Any reduction in permeable pavement materials, earthwork, or labor is basis for bond reduction
request, if inspection request form, revised qty. estimates are submitted, and bond reduction process
followed. (Rev. 1) Applicant response: `Acknowledged. Bonds to remain in place if they are sufficient.'
Engineering Review Comments
Page 2 of 3
6. C4.0 —Increase proposed 3' walkway width to 4', min. seeimage,bel T'. [ image removed with Rev. 1
comments ] (Rev. 1) Addressed.
7. C5.0 — Relocate structure 100 (24" DIA pipe outfall) to a point not more than 50' stream -ward of the WPO
buffer. Ref. 17-604.A. (storm line within landward 50' of WPO buffer is permissible) Also image, below.
(Rev. 1) Addressed.
�L 4" HDPE TO TIE TO RdOF
_ - LEASER. MAINTP,I14 1
S�OPE MIN. (TYP.)
\' 421 / /
420
1I_
- - 102 l -
1
�418
411
103
1 T -
;r1VP0 RUPPER,
o
I
1.0' AVG DIA RIeRAP
i
- - _ CLASS Al
,{ `WIDTH 1 = 6' \ �,
C6.0
8. Please confirm Flood Protection post -developed Q2, Q10 CFS values are consistent, wherever they appear
(apparent typos during plan review on 1115). (Rev. 1) Addressed.
9. Beneath Water Quality Analysis text box, lower -left, please provide initial WP0201800078 post -developed
impervious area, managed turf, and initial total load reduction required, =1.65 lb. (Rev. 1) Addressed.
10. C6.1 — Ensure table below is legible once plan is printed. [ image removed with Rev. I comments ] (Rev.
1) Addressed.
It. C6.2 —Str. 120 allowable ponding depth, 0.4% appears to exceed height of curb opening, 0.333'. Review
/revise Str. 120 DI length, as needed. (Rev. 1) Addressed.
12. C6.6 —Recommend revise SWM facility easement plat, since easement for SW4 is not needed (SW4
eliminated) and trim SW3 easement dimensions so future improvements may be built outside recorded
easement. Without easement plat revision, SWM facility easements appear excessive and may conflict
with future development in proximity to revised building footprint. (Rev. 1) Comment persists. Applicant
response: `Timmons Group is currently working to amend the previously recorded easement plat. Plat
submission to follow soon.'
13. Provide sheet similar to L3.30, Mitigation Planting Plan. Ensure proposed mitigation meets required 2:1
ratio offset required of buffer impact, which may be less than initial WP0201800078 WPO buffer impact.
(Rev. 1) Addressed. Note: $605 Mitigation plan bond (2 canopy trees @ $150/ea.; 10 shrubs @ $25/ea. +
10% contingency) is inconsequential compared with staff time required to process bond in this amount.
Engineering Review Comments
Page 3 of 3
Little recommends expense of processing a Mitigation plan bond for this Applicant. Project is otherwise
bonded.
Given coronavirus-related changes to county public meeting practice, Engineering is unable to meet with Applicants
in the near -term, but welcomes calls /Zoom telecon., etc., to discuss this review.
County forms can be found on the county website forms center under engineering;
hllp://www.albemarle.ora/deptfonns.asp?department--cdenoTo
WPO201800078 -Amendment 1 -Keswick Hall Spa 050620rev1