HomeMy WebLinkAboutWPO201800020 Review Comments WPO VSMP 2018-04-27COUNTY 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
Project title: Keswick Hall Additions and Site Improvements
Project file number: WP0201800020
Plan preparer: Timmons Group, Craig Kotarski, P.E. craig.kotarski@timmons.com
Owner or rep.: Historic Hotels of Albemarle, LLC, John Trevenen jrevenen@keswick.com
Plan received date: 27 March 2018
Date of comments: 27 April 2018
Reviewer: WW Associates, Inc.
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 denied. The rationale is
given in the comments below. The VSMP application content requirements can be found in County
Code section 17-401.
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 ESCP, (3) a SWMP, and (4) any TMDL measures necessary.
1. SWPPP Section 1 — Please have the owner execute the Registration Statement Certification (Item 12)
and resubmit. Delete instructions for filling out the Registration Statement from the SWPPP
documents.
2. SWPPP Section 2 — Please provide a copy of the DEQ coverage letter when obtained.
3. SWPPP Section 7 — Please add the verbiage from subparagraphs (b) and (c) of 9VAC25-880-70 Part
I(B)(4).
4. SWPPP Section 9 — Complete and sign the certification.
5. SWPPP Section 10 — Per 9VAC25-880-70 Part K, provide the person with the authority to sign
inspection reports or to modify the stormwater pollution prevention plan.
B. Pollution Prevention Plan (PPP)
The PPP content requirements can be found in County Code section 17-404.
1. SWPPP Section 6 PPP meets Albemarle County Code section 17-404 requirements.
C. Stormwater Management Plan (SWMP)
VSMP Regulation 9VAC25-870-108 requires the VSMP authority to approve or disapprove a
SWMP. This plan is disapproved, and the reasons are provided in the comments below. The
Stormwater management plan content requirements can be found in County Code section 17-403.
1. Please provide pre- and post -development hydrographs for Water Quantity Analysis Points 1
through 5 and place on the plans.
2. Please provide the pre- and post -development Tc calculation worksheets for Water Quantity Analysis
Points 1 through 5 drainage areas.
Engineering Review Comments
Page 2 of 4
3. Please provide complete VRRM spreadsheets for Water Quality Analysis.
4. Please provide 2-year and 10-year routing worksheets for SWM1 and SWM2. Please route the 100-
year storm event for SWM1 and SWM2 and place the routed 100-year post -developed flow water
surface elevation on the SWM1 and SWM2 details on Sheet No. C6.03.
5. Pretreatment of runoff entering biofilters is required. Please provide.
6. Please provide a ratio of shortest flow path to overall length calculation, provide recalculation on the
plan, and geographically show on the plan for each biofilter.
7. A nutrient credit availability letter is shown on Sheet No. C6.03. Please provide documentation that
the Oak Grove facility is within the HUC contained in SWPPP Registration Statement.
8. Please note that additional comments may be generated based on response to these comments.
D. Erosion and Sediment Control Plan (ESCP)
Virginia Code §62.1-44.15:55 requires the VESCP authority to approve or disapprove an ESCP.
This plan is disapproved, and the reasons are provided in the comments below. The erosion control
plan content requirements can be found in County Code section 17-402.
1. Please add WPO201800020 to the cover sheet of the plans and SWPPP.
2. The County's Critical Resource Plan indicates critical slopes within the limits of clearing and
grading/disturbance. Please add the critical slopes within the limits of clearing and
grading/disturbance to the plan and label whether managed or preserved.
3. Please add limits of clearing and grading/disturbance to the demolition sheets.
4. Please provide location of construction entrance (CE) on Phase I and Phase II E&SC plans. It
appears that a CE was intended to be located from SR 731 Keswick Road adjacent to the "Energy
Plant Building" and the "Laundry Building."
5. Please add a note indicating the new retaining walls 3 feet and higher require separate building
permit. If retaining walls are within managed critical slopes, the design must comply with Albemarle
County Code Chapter 18 Section 30.7.5.
6. There are numerous trees along the east and southeast side of the project within the limits of clearing
and grading that are to remain (not be demolished) but not indicated to be protected with tree
protection measures. Please provide tree protection for existing trees to remain. Further, trees
shown as being demolished are to be removed from the Phase I and II Erosion and Sediment Control
Plans.
7. Sheet No. C3.03 — SSF shown to be constructed across Club Drive approximately 150 feet south of
SR 731 Keswick Road. Is Club Drive intended to be closed? Please advise. If not, remove SSF
from across the road.
8. Sheet No. C3.00 — The E&SC narrative section "Off Site Areas" references that some utility
connections will require offsite connections. These will need to be shown on the plans if ground is to
be disturbed to include erosion and sediment control measures.
9. Please show stockpile locations on plan.
10. Please verify that cut or fill balances have a deficit of 10,000 C.Y. or less.
11. Please identify on the plan the contractor staging/laydown area and parking area.
12. Silt fence in numerous locations is shown running perpendicular to the contour. Silt fence is to be
installed on contour, not across contour. Please place silt fence tangents parallel to contour or
provide other measures to contain E&S.
13. Sheet No. C3.05 — Silt fence appears to traverse across the existing driveway to existing house/to
proposed laundry building. Please remove silt fence from across existing driveway.
14. Sheet No. C3.00 — Silt Fence Break (SFB) measure not found on Phase I and II drawings. Please
delete detail from this sheet. Also note that SFD is not an approved VE&SCH control measure
unless a variance is requested and subsequently approved by the program authority.
Engineering Review Comments
Page 3 of 4
15. In accord with VE&SCH Standards and Specifications 3.13 Sediment Traps, the maximum height of
the sediment embankment shall be 5 feet as measured from the base of the store outlet (see
VE&SCH page III-73 Embankment Cross -Section and page III-74 plate 3.13-1). Sediment trap ST-
1 (on Sheet No. C3.02) embankment height exceeds this requirement by approximately 5 feet.
Please provide an erosion and sediment control measure that meets the VE&SCH requirements for
this drainage area. Further, this trap should be labeled as ST-2 per calculations shown on Sheet No.
C3.00.
16. Sheet No C3.03 — a wedge drainage area to the west of the Energy Plant Building and drainage area
east of sediment trap 41 is uncontained and drains directly to Keswick Road. Please provide erosion
and sediment control measures to provide containment for this portion of the site and add to the
respective Phase II plan sheet.
17. Please add check dam detail to Sheet No. C3.00.
18. Sheet No. C3.07 — no erosion and sediment controls shown between the new hotel addition and
Fairway Drive. Please provide appropriate controls for this area.
19. Sheet No. C3. I O/C5.09 — the parking area to the northeast of the new laundry building depicts the
427 closing on itself resulting in ponding of water. No soil type is shown on Sheet No. C3.05. The
area enclosed by the 427 contour is substantial and water will remain/stagnate until it
evaporates/infiltrates. Further, a good portion is within the new paved parking lot in front of the
building. It is recommended that drainage be relieved overland, or by an area drain with outfall.
20. Sheet No C3.09 — The inlet and outlet of the culvert under Club Drive are to be equipped with inlet
protection and outlet protection to include outlet protection calculations for the drainage area directed
to this culvert.
21. Sheet No. C3.08 — Please provide outlet protection calculations for storm drain structure 100.
22. Sheet No. C6.04 — Please provide drainage area to culvert C3/C 1 and provide which drainage
structure will receive the existing hotel roof drainage.
23. Please demonstrate that the drainage from the new parking lot area does not exceed the existing
capacity of the existing culvert under Keswick Drive located just to the east of Club Drive. Provide
appropriate culvert hydraulic calculations for the VDOT-required storm event for a state route.
24. Please provide closed conduit storm drain pipe and drop inlet/curb drop inlet calculations and
provide culvert calculations for the culvert under the hotel entrance from Club Drive. Provide
LD204, LD229, and LD269 worksheets (See VDOT Drainage Manual).
25. Please add TP tree protection symbol to the legend on E&SC Phase I and Phase II plan sheets.
The VSMP permit application and all plans may be resubmitted for approval when all comments have been
satisfactorily addressed. For re -submittals please provide 2 copies of the complete permit package with a
completed application form.
Engineering plan review staff are available from 2-4 PM on Thursdays, should you require a meeting to
discuss this review.
Process:
After approval, plans will need to be bonded. The bonding process is begun by submitting a bond estimate
request form and fee to the Department of Community Development. One of the plan reviewers will prepare
estimates and check parcel and easement information based on the approved plans. The County's
Management Analyst will prepare bond agreement forms, which will need to be completed by the owner and
submitted along with cash, certificates or sureties for the amounts specified. The agreements will need to be
approved and signed by the County Attorney and County Engineer. This may take 2-4 weeks to obtain all the
correct signatures and forms.
Engineering Review Comments
Page 4 of 4
Stormwater Management Facilities Maintenance agreements will also need to be completed and recorded.
The County's Management Analyst or other staff will prepare the forms and check for ownership and
signature information. The completed forms will need to be submitted along with court recording fees.
After bonding and agreements are complete, county staff will need to enter project information in a DEQ
database for state application processing. DEQ will review the application information based on local VSMP
authority approval. At this time, the DEQ portion of the application fees will need to be paid directly to the
state. For fastest processing, this is done electronically with the emails provided on the application. DEQ
should notify applicants with instructions on how to pay fees. When DEQ approves the application, they will
issue a permit coverage letter. This should be copied to the county.
After DEQ coverage is issued, via the coverage letter, the County can hold a pre -construction conference.
Applicants will need to complete the request for a pre -construction conference form, and pay the remainder of
the application fee. The form identifies the contractor and responsible land disturber, and the fee remaining to
be paid. This will be checked by county staff, and upon approval, a pre -construction conference will be
scheduled with the County inspector. At the pre -construction conference, should everything proceed
satisfactorily, a joint VSMP and grading permit will be issued by the County so that work may begin.
County forms can be found on the county website forms center under engineering;
http://www.albemarle.org/deptforms.asp?department=cdengffo
File: WPO201800020 Keswick Hall Additions and Site Improvements 04-27-18.doc