HomeMy WebLinkAboutWPO202100064 Review Comments WPO VSMP 2022-05-06t� OF ALB
County of Albemarle
COMMUNITY DEVELOPMENT DEPARTMENT
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VSMP Permit Plan Review
401 McIntire Road, North Wing
Charlottesville, VA 22902-4579
Telephone: 434-296-5832
WWW.ALBEMARLE.ORG
Project title:
DS Tavern — Water Protection Ordinance Amendment #1 to WPO202100064
Project:
WPO2021-00064
Plan preparer:
Eric Woolley, PE, Woolley Engineering — Consulting Civil Engineers
210 5t' Street NE, Charlottesville, VA 22902 — ewoollevcd�woollev-eng.com
Owner or rep.:
Ivy Road RE LLC — 800 E. Canal Street, Ste 1900
Richmond, VA 23219
Applicant:
Janet Artz, 3449 Ivy Road, Charlottesville, VA 22901
ianetk0704cUitol.com —Initial WPO Plan
Respondents:
Natalie LaRoe, Matthews Development Company
nataliekmatthewsdevelop. com
( Amendment #1)
108 5t' St. SE, Suite 305 Charlottesville, VA 22902
Michael T. Boggs II, Alexander Nicholson Inc
mboggsAalexandemicholson.com
100 Keystone Place, Charlottesville, VA 22902
Plan received date:
11 Apr 2022
Date of comments:
6 May 2022
Reviewer:
John Anderson, PE
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 Amendment to approved WPO Plan is
disapproved.
A. Stormwater Pollution Prevention Plan (SWPPP)
The SWPPP content requirements can be found in County Code section 17-405. A SWPPP must contain
(1) a PPP, (2) an ESOP, (3) a SWMP, and (4) any TMDL measures necessary.
1. SWPPP:
a. Please revise /update approved SWPPP with:
i. Amended plan sheets (11" x17").
ii. Registration Statement (Sec. 1 /SWPPP template) that indicates increase in limits of
disturbance from 0.57 Ac. to 0.66 Ac., revises estimated begin -end construction dates,
and is signed /dated by responsible corporate official, if not already. Please call if any
questions.
iii. Update PPP Exhibit, SWPPP Sec. 6.A.
iv. Provide update as needed to named individuals listed at:
1. SWPPP, Sec. 6.E. -Named individual responsible for pollution prevention
practices.
2. Sec. 8 — Named individual responsible for VESCH compliance inspections.
B. Pollution Prevention Plan (PPP) —see SWPPP item l.a.iii., above.
The PPP content requirements can be found in County Code section 17-404.
C. Stormwater Management Plan (SWMP)
VSMP Regulation 9VAC25-870-108 requires the VSMP authority to approve or disapprove a SWMP. This
plan is disapproved for reasons listed below. The stormwater management plan content requirements can be
found in County Code section 17-403.
Engineering Review Comments
Page 2 of 3
1. Concentrated storm discharge near entrance to DS Tavern must meet energy balance. Statement at
Stormwater Quantity Note, cover sheet/C6.0 that `this site is outside the limits of analysis for Flood and
Channel Protection requirements due to the site contributing drainage area being less than 1 % of the total
contributing drainage area at the point of analysis' does not recognize DEQ position that concentrated
discharge even at limit of analysis must, at point of discharge, meet the energy balance requirement. Please
revise design to meet EB at point of analysis. Feel free to call to discuss.
2. Notes:
a. Initially -approved plan, by Lineage Architects, Engineers, Surveyors, d. 12/16/21, proposed sheet
flow as post -developed condition to meet storrnwater quantity requirements at 9VAC25-870-
66.D., an approach reviewed and accepted. Amendment proposes pipe discharge of concentrated
runoff, which is not sheet flow, and not exempt from EB requirements on basis of development
DA v. receiving stream DA alone, but rather must meet EB requirements at point of discharge.
b. Amended plan relies on new and existing storm pipe (prior plan relied on sheet flow), a portion of
which is existing pipe on adjacent parcel under common ownership (Ex. 20" HDPE). Engineering
can evaluate site discharge as a single outfall and single point of analysis, since outfall 31 releases
interior to the site, with storm runoff then traversing overland to inlet 2, then exiting outfall 1
(new), which is coincident with outfall 3 (Ex. 20" HDPE), but item 1, above, applies to point of
analysis. The entire site, if analyzed as a single point discharge to receiving stream near box
culvert beneath U.S. Rt. 250 must meet EB requirements prior to release to the receiving stream.
From initial plan:
DRAINAGE BASIN AREA
p
77
I
Mn l�a� LR.IEN
--- -- --
DIRECTION OF PROPOSED FLOW
C-05 B
c. SWM quality requirements are met with purchase of 0.29 lb. nutrient credits (approved 4/15/22),
qty. sufficient to cover initial and Amended plan SWM water quality requirements.
d. $17,390 water protection performance bond includes no SWM Plan or Mitigation Plan component
since the initial WPO plan proposed no Mitigation or SWM. The Amended plan, received 4/11,
was not reviewed in time to adjust bond amount posted May 4. Although a Grading permit has
likely been issued for work shown under the initial approved plan (0.57 Ac.), if the amended plan
includes storm facilities, for example detention pipes (24"-36"), then at that point a revised bond
amount to include both mitigation plantings and SWM detention facilities will be calculated and a
bond for this amount will be required unless by date of Amendment approval ESC measures are
installed sufficient to extend /apply ESC bond amount to cover mitigation plantings and SWM
facilities and if total expense of SWM — Mitigation is anticipated to be not more than $17,390 and
if Applicant provides express permission for Albemarle to apply existing now -posted $17,390
bond amount to any aspect of the WPO plan (ESC, SWM, Mitigation). Applicant reached out to
ensure that bond posted 4 May 2022 was sufficient to meet project need (Natalie LaRoe email,
April 13, 2022 2:43 PM) and was assured by this reviewer that the bond amount was accurate.
This email arrived several days after the WPO plan amendment (now under review) was submitted
11-Apr, affording Albemarle opportunity to check submittal and note whether additional bond
Engineering Review Comments
Page 3 of 3
amount would be required. It is a disservice to assure an applicant seeking to confirm a bond
estimate accurate, that it is, when information is available that additional bond may be required.
Experience dictates additional bond may be required, but in this circumstance, once ESC measures
on the Amended WPO plan are installed, it is reasonable to estimate (with Applicant permission)
$17,390 would be eligible for bond purposes for mitigation plantings and HDPE, CMP, RCP 24"
or 36" pipe (several hundred feet), should detention be required. Albemarle intends to handle this
fairly: with Applicant permission to apply bond amount if /as needed to any aspect of approved
Amended plan, once Amendment is approved, be it ESC, SWM, or Mitigation plantings. A letter
response from owner, DS Tavern, to Albemarle to this effect will suffice. If, however, calculated
Mitigation planting and SWM facility expense significantly exceed $17,390, Albemarle may need
to reconsider and request an additional bond amount for mitigation plantings and SWM facilities.
3. C5.1: Increase pipe slope between DI4 and outfall 3 to 0.50%, Min. (see attached drainage plan checklist).
4. Calculation booklet:
a. Revise p. 4-6, consistent with final revised SWM design, consistent with 9VAC25-870-66.
b. Revise title to include ref. to W 0202100064 Amendment 1.
D. Erosion and Sediment Control Plan (ESCP)
Virginia Code §62.1-44.15:55 requires the VESCP authority to approve or disapprove an ESCP. The
Amended ESC plan is approved.
Process:
Applicant has or will soon receive a Grading Permit for the initially -approved plan by Lineage, d. 12/16/21 which
authorizes 0.57 Ac. land disturbance, but does not show SWM facilities (detention, for example), or Mitigation Plan,
or plantings. Applicant requested confirmation of bond amount April 13, 2022. At that time, this reviewer informed
multiple parties that bond amount ($17,390) was accurate. This amount did not include any SWM line items that
may eventually be required to approve the Amendment. This amount does not include any expense for mitigation
plantings (canopy trees, shrubs, meadow mix). April 11, 2022, the Amendment plan was submitted and available
for cursory review to check for any effect on WPO plan bond amount. Reviewer failed to check this plan, and in
fairness to applicant, an approach to use of bond posted 4 May 2022 is outlined above. Albemarle requests letter of
permission from Owner, DS Tavern, to apply now -posted $17,390 WPO plan bond amount to any aspect of the
WPO plan, once ESC measures are installed. With Applicant /Owner's permission, the current bond amount should
prove sufficient, if available to apply this amount to Mitigation Plantings, limited detention pipe, or ESC measures.
Note: Any approved SWM facilities with this Amendment require a SWM facility maintenance agreement and
easement plat prior to reduction or release of the WPO plan bond amount. This Amendment, which proposes point
discharge of concentrated storm runoff, is likely to require on -site storm detention. Albemarle anticipates SWM
Facility Maintenance Agreement and SWM /public drainage easements will be required, and need to be recorded.
Applicant purchased 0.29 lb. phosphorus nutrient credits to cover initially -approved and amended WPO Plan.
Credits approved 4/15/22.
It is reviewer's understanding that Albemarle and Applicant have met or will soon meet in pre -construction
conference. This project is eligible to proceed under initially -approved plan (0.57 Ac. LOD), but is not authorized
to disturb 0.66 Ac. shown with Amendment design (Woolley Engineering).
Thank you.
Please call if any questions — tel. 434.296-5832-x3069, or email 4anderson2(a)albemarle.org.
WPO202100064_DS Tavem_Amend 1_050622