HomeMy WebLinkAboutWPO201800023 Approval - County 2018-09-18COUNTY OF ALBEMARLE
Department of Community Development
401 McIntire Road, Room 227
Charlottesville, Virginia 22902-4596
Phone (434) 296-5832 Fax (434) 972-4126
Project title:
Project file number:
Plan preparer:
Owner or rep.:
Plan received date:
Plan received date
(Revision 1):
Plan received date
(Revision 2):
(Rev. 3)
(Rev. 4)
(Rev. 5)
(Final)
Date of comments:
Date of comments
(Revision 1):
Date of comments
VSMP Permit Plan Review
Keswick Hall Central Energy Plant Demolition and Renovation
WP0201800023
Timmons Group, Craig Kotarski, P.E. craig.kotarski@timmons.com
Historic Hotels of Albemarle, LLC, John Trevenen jrevenen@keswick.com
27 March 2018
19 July 2018
21 August 2018
12 Sep 2018 - .PDF
13 Sep 2018 - .PDF
13 Sep 2018 - .PDF
13 Sep 2018 —Print
27 April 2018
03 August 2018
(Revision 2): 31 August 2018 (sent to Applicant, 9/11, delinquency coordination error)
(Rev. 3) 12 Sep 2018 — email
(Rev. 4) 13 Sep 2018 — email
(Rev. 5) 14 Sep 2018 — email
(Final) 18 Sep 2018 —Approved*
* Approval pending recordation of Maintenance Agreement & Easement Plat
Reviewer: WW Associates, Inc. (Rev. 3 - Final, J. Anderson, Albemarle Engineering)
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.
A. Stormwater Pollution Prevention Plan (SWPPP) — Comments 1, 2, 4, and 5 require resubmission
of the SWPPP. (Final) Prior review comments addressed.
SWPPP Section 1 — Please have the owner execute the Registration Statement Certification (Item 12) and
resubmit. Delete instructions for filling out the Registration Statement.
Revision 1 Response: The registration statement shall be signed prior to final site plan approval.
Instructions have been deleted from the registration statement.
Revision 1 Comment: Acknowledged.
2. SWPPP Section 2 — Please provide a copy of the DEQ coverage when obtained.
Revision 1 Response: Acknowledged, DEQ coverage shall be provided upon request.
Revision 1 Comment: Acknowledged.
SWPPP Section 7 — Please add the verbiage from subparagraphs (b) and (c) of 9VAC25-880-70 Part
I(B)(4).
Revision 1 Response: Language from 9VAC25-880-70 Part 1(B)(4) subparagraphs (b) and (c) has
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been added to Section 7 of the SWPPP.
Revision 1 Comment: Comment addressed.
SWPPP Section 9 — Complete and sign the certification.
Revision 1 Response: Certification to be completed and signed prior to final site plan certification.
Revision 1 Comment: Acknowledged.
Revision 2 Response: Certification to be completed and signed prior to final site plan
certification.
Revision 2 Comment: Acknowledged.
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.
Revision 1 Response: Section 10 to be completed once a contractor has been selected.
Revision 1 Comment: Acknowledged.
Revision 2 Response: Section 10 to be completed prior to final site plan approval.
Revision 2 Comment: Acknowledged.
B. Pollution Prevention Plan (PPP) — PPP comment addressed with Revision 1.
The PPP content requirements can be found in County Code section 17-404.
SWPPP Section 6 PPP meets Albemarle County Code Section 17-404 requirements.
Revision 1 Response: Acknowledged.
Revision 1 Comment: PPP is approved.
C. Stormwater Management Plan (SWMP) —with Rev. 2 VSMP Plan, all prior comments addressed, except
item 8. Comment 8 addressed via email /.PDF exchange (J. Anderson). VSMP Regulation 9VAC25-870-108
requires the VSMP authority to approve or disapprove a SWMP. This plan is qpproved.
Please provide pre- and post -development hydrographs for Water Quantity Analysis Points 1, 2, and 3 and
place on the plans.
Revision 1 Response: Pre- and post -developed stormwater calculations can be found in separate
documents titled "Design Calculations & Narrative" submitted separately to the County for review.
A digital copy shall be provided for your use and review.
Revision 1 Comment: 2 copies of the post -developed calculations were provided. Please provide the
pre -developed calculations.
Revision 2 Response: Pre -developed calculations have been provided for your use and review.
Revision 2 Comment: Comment addressed.
Please provide the pre- and post -development flow path and calculations for all pre- and post -developed
drainage areas shown on the plans.
Revision 1 Response: Pre- and post -developed flow paths can be found on Sheets C6.0 and C6.1.
Revision 1 Comment: Comment partially addressed. Please provide time of concentration flow path
for analysis point 3 and provide time of concentration calculations for all three analysis points.
Revision 2 Response: Additional flow path arrows have been provided. Per direction from John
Anderson P.E., of Albemarle County Community Development, time of concentration calculations
are not required to be shown on plan sheets. Time of concentration values have been provided
along with lengths of sheet flow, shallow concentrated flow.
Revision 2 Comment: Comment addressed.
3. Please provide VRRM spreadsheets for Water Quality Analysis and place on the plans.
Revision 1 Response: A VRRM spreadsheet can be found in separate documents titled "Design
Calculations & Narrative" submitted separately to the County for review. A digital copy shall be
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provided for your use and review.
Revision 1 Comment: The VRRM spreadsheet is incomplete. The portion indicating treatment type
selected appears to be cut off (i.e. bioretention and level design). The spreadsheets are to be placed
on the plans.
Revision 2 Response: VRRM spreadsheet has been included on the plan set. A copy of the VRRM
spreadsheet can be found in separate documents titled "Design Calculations & Narrative" submitted
separately to the County for review.
Revision 2 Comment: Comment addressed.
4. Please provide routing of the Bioretention Facility No. 1.
Revision 1 Response: Routing for Biorention Facility No. 1 can be found in separate documents
titled "Design Calculations & Narrative" submitted separately to the County for review. A digital
copy shall be provided for your use and review.
Revision 1 Comment: Comment addressed.
5. Please provide the planting plan and schedule for Bioretention Facility No. 1.
Revision 1 Response: See Sheets L1.00 and L2.00 for planting plan and schedule.
Revision 1 Comment: Comment not addressed. Sheets L1.00 and L2.00 not provided with this plan.
Revision 2 Response: Sheets L1.00 and L2.00 have been provided.
Revision 2 Comment: Comment addressed.
6. Pretreatment of runoff entering Biofilter No. 1 is required. Please provide.
Revision 1 Response: A gabion basket forebay wall has been provided as a method of pretreatment.
See Sheet C5.0.
Revision 1 Comment: Comment partially addressed. Please provide calculations demonstrating
pretreatment volume of 15% of total treatment volume and appropriate calculations demonstrating
a 2:1 length -to -width ration per Section 6.4 of the Virginia DEQ Stormwater Design Specification
No. 9 (Version 2.0 dated January 1, 2013).
Revision 2 Response: Stormwater Design Specification No. 9 (Version 2.0 dated January 1, 2013).
Gabion forebay wall has been revised accordingly. See Sheet C6.2 for treatment volume
calculations.
Revision 2 Comment: Comment addressed.
7. Please provide ratio of shortest flow path to overall length calculation and graphically show on the plan.
Revision 1 Response: All nyloplast riser structures elevations shall be 0.5 ft. about the bottom of the
biofilter. System short-circuiting will not occur.
Revision 1 Comment: Comment addressed.
Please note that additional comments may be generated based on response to these comments.
Revision 1 Response: Acknowledged.
Revision 1 Comment: Please note that additional comments may be generated based on response to
these comments.
Revision 2 Response: Acknowledged.
Revision 2 Comment: As based on the information submitted to address comment 5 above and VA
DEQ Stormwater Design Specification No. 9 Version 2.0 dated January 1, 2013, Section 6.8
Bioretention Planting Plans, please address the following comments:
A. As based on the planting plan, it appears that the turf and tree planting template is
proposed and, as such, planting caliper is to be 1-inch and planting density 1 tree per 250
square feet of surface area per the above -referenced specification. At present, the planting
plan denotes two 6" caliper American Sycamores and one 3" caliper River Birch are to be
planted within 3,067 square foot bioretention surface area. Please provide planting of the
caliper and density referenced in the DEQ specification.
B. Please adjust the level 1 bioretention detail on Sheet No. C6.2 to denote a turf surface and
Engineering Review Comments
Page 4 of 6
mulched islands for tree plantings. (Rev. 5) Addressed.
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 approved pending approval of waiver to disturb critical slopes. (Update: Critical slopes waiver
approved 5-Sept 18, Albemarle BOS consent agenda; see also Timmons email: 9/11/2018 11:17 PM)
Please add WPO201800023 to the cover sheet of the plans and SWPPP.
Revision 1 Response: Cover sheet and SWPPP have been updated accordingly. See Sheet C0.0 and
SWPPP documentation.
Revision 1 Comment: Comment addressed.
The County's Critical Resource Plan indicates critical slopes within the limits of clearing and
grading/limits of disturbance. Please add the critical slopes within the limits of clearing and grading/limits
of disturbance to the plan and label whether managed or preserved.
Revision 1 Response: See Sheets C2.1 and C2.2. A critical slopes waiver has been submitted and will
be reviewed by the board on September 5'
Revision 1 Comment: Requested information added to plan. The design consultant denotes that
waiver to disturb critical slopes is to be reviewed by the board on September 5, 2018. A land
disturbing permit will not be approved until board approval is obtained.
Revision 2 Response: Acknowledged.
3. Please add limits of clearing and grading/limits of disturbance to demolition Sheet Nos. C2.3 and C2.4.
Revision 1 Response: The limits of disturbance have been added to Sheets C2.3 and C2.4.
Revision 1 Comment: Comment addressed.
Sheet No. C2.3 — Please add removal/demolition X's to the brick walk to the south of the Energy Plant
Building and across the drive aisle. Also, there are removal/demolition X's in the referenced drive aisle.
Please identify what is to be demolished/removed or delete these X's from the plan.
Revision 1 Response: Demolition linework has been revised. The removal/demolition X's within the
drive aisle indicate the portion of the drive aisle that will be required to be removed for building
construction. See Sheet C4.0.
Revision 1 Comment: Comment addressed.
Sheet No. C2.3 — On the north side of building to be removed/demolished, a note indicates "see arch/map
plans for building and utility removal." Please note which impervious surfaces in this area are being
removed/demolished and label as such on this plan sheet.
Revision 1 Response: Demolition linework has been revised to reflect the extent of impervious
surfaces that are to be removed. Existing energy building to remain.
Revision 1 Comment: Comment addressed.
Sheet No. C3.1 Silt fence along the southeast side of the swimming pool area is proposed to be installed
perpendicular to contours in several locations. Silt fence is to be installed on contour, not across contours.
Please place silt fence on tangent parallel to contour or provide other measures to contain E&S.
Revision 1 Response: Silt fence has been revised to be parallel with contours. See Sheets C3.1 and
C3.2.
Revision 1 Comment: Silt fence has been adjusted. However, limits of disturbance needs to be
adjusted such that silt fence is within the limits of disturbance. Please adjust accordingly.
Revision 2 Response: Limits of disturbance has been revised to include silt fence.
Revision 2 Comment: Comment addressed.
7. Sheet No. C3.1 — Silt fence break is noted as a measure to be provided. This control measure is not a
Engineering Review Comments
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Virginia Erosion and Sediment Control -approved device. Please adjust plan accordingly to depict
approved control measures or submit a variation request.
Revision 1 Response: Acknowledged. The silt fence break has been removed from the plans and
E&SC measures have been adjusted accordingly.
Revision 1 Comment: Comment addressed.
8. Please add TP tree protection symbol to the legend on E&SC Phases I and II plan sheets.
Revision 1 Response: The tree protection symbol has been added to the legend on E&SC Phases 1
and 2.
Revision 1 Comment: Comment addressed.
9. The CWD (Clean Water Diversion) is to be released through a stabilized outlet or channel. Please provide
a stabilized outlet such as rip -rap outlet protection.
Revision 1 Response: CWD will no longer be utilized to convey storm water. See sheet C3.2.
Revision 1 Comment: Comment addressed.
10. It is noted that the Phase I (Sheet No. C3.1) Construction Entrance (CE) is not shown on the Phase II
E&SC plan Sheet No. C3.3. CE's are to be provided until County E&S Inspector allows removal. Please
adjust Phase II E&SC plan to include Phase I CE.
Revision 1 Response: E&SC Phase 2 plans have been revised to show construction entrances. See
Sheets C3.3 and C3.4.
Revision 1 Comment: Comment addressed.
11. Sheet No. C3.3 — Please show the drip line of the existing tree to remain located just south of the SFB
symbol.
Revision 1 Response: Acknowledged. This tree is to be removed as part of the proposed demolition
and improvements incorporated within this plan set. See Sheet C3.3.
Revision 1 Comment: Comment addressed.
12. The narrative on Sheet No. C3.0 under offsite areas states that some utility connections will be offsite.
These areas are to be shown if ground is to be disturbed to include erosion and control measures.
Revision 1 Response: This portion of the narrative has been revised. All utility connections will take
place onsite.
Revision 1 Comment: Comment not addressed. Note has not been revised as stated.
Revision 2 Response: Sheet C3.0 has been revised accordingly.
Revision 2 Comment: Comment addressed.
13. Please show stockpile location on plan.
Revision 1 Response: A stockpile location has been provided west of the Bioretention Facility 1. See
Sheet C3.1.
Revision 1 Comment: Comment addressed.
14. Please verify that cut or fill balances have a deficit of 10,000 C.Y. or less.
Revision 1 Response: Cut or fill balances will have a deficit of 10,000 C.Y. or less.
Revision 1 Comment: Comment addressed.
15. Please identify contractor staging/laydown area and parking area.
Revision 1 Response: Staging/laydown areas have been indicated accordingly. See Sheets C3.1 and
C3.2.
Revision 1 Comment: Comment addressed.
16. A closed conduit storm drain system is shown on the north side of the energy plant. Please provide inlet
protection if these structures are inlets.
Engineering Review Comments
Page 6 of 6
Revision 1 Response: Inlet protection has been providing accordingly. See profile on Sheet C5.0 for
structure information.
Revision 1 Comment: Comment addressed.
17. Please provide outlet control calculations for the rip -rap at structure 600.
Revision 1 Response: Outlet control calculations have been provided for structure 610 (formally
structure 600). See Sheet C5.0.
Revision 1 Comment: Comment addressed.
18. 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 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.
Revision 1 Response: Proposed sediment trap has been relocated further down the slope.
Embankment height has been reduced to meet VE&SCH requirements. See Sheet C3.2.
Revision 1 Comment: Comment addressed.
19. No drainage computations for the closed conduit storm drain system were provided. Please provide storm
drain inlet and storm drain pipe calculations as well as drainage area map for the closed conduit storm
drain system.
Revision 1 Response: Drainage computations for the closed conduit storm drain system can be
found in separate document titled "Design Calculations & Narrative" submitted separately to the
County for review. A digital copy shall be provided for your use and review.
Revision 1 Comment: Comment addressed.
Final print copies of VSMP plan, design calculations, and SWPPP were received on 9/13/18.
Process:
SWM Facility Maintenance Agreement, Easement Plat, Deed of Dedication, and Bonds are in process,
Applicant is in close contact with Albemarle County.
Albemarle requires deed of dedication of easement be recorded prior to transferring project data to DEQ
stormwater management database. Please be alert for DEQ email request for payment of state -portion of
VPDES permit fee. Once Albemarle receives a scan of DEQ receipt of payment, we are positioned for pre -
construction. Please find preconstruction meeting request form + fee requirements at:
hgps://www.google.com/url?q=http://www.albemarle.org/upload/images/fonns center/departments/Communiiy Development/fo
rms/W12lications/WPO_Virginia —Erosion_and_Sediment_Control_Program_Pre-
Construction_Meetine and Permit Request.pdf&sa=U&ved=OahUKEwiAweSroMXdAhUsVt8KH08BA8wQFggEMAA&clie
nt--internal-uds-cse&cx=013641561590022973988:g3cwisrdbli&usg=AOvVawl ab4dJgO5pnOtOtRCNV VZF
Please hand -deliver (or mail) request for pre -construction meeting, with fee (check / 594), to CDD /front desk
at the County Office Building at 401 McIntire Road, Charlottesville, at your earliest convenience.
Please let us know if you have any questions concerning plan approval, bonds, plat, deed, or process. Thank
you for your help and patience.
J. Anderson / janderson2kalbemarle.org 434.296-5832 —x3069
File: WPO201800023 Keswick Hale 6y Plant Demolition Reno 091818-Approval