HomeMy WebLinkAboutWPO201700070 Review Comments WPO VSMP 2020-04-28COUNTY 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:
Albemarle County Route 250 Business (Ivy Road) Sidewalk
Project file number:
WP0201700070
Plan preparer:
Brian McPeters [ brian.mc]2eters(a)kimley-horn.com ], Jonathan Oliver,
Michael Mitchell / Kimley-Horn Associates
Owner or rep.:
Jack Kelsey [ jkelsey(a)albemarle.org ]
Plan received date:
September 25, 2017
(Rev. 1)
28 Jan 2019
(Rev. 2)
17 Oct 2019 — diQital
(Rev. 3)
4 Feb 2020 — diQital
(Rev. 4)
16 Mar 2020 — diQital
Date of comments:
October 27, 2017
(Rev. 1)
5 Mar 2019
(Rev. 2)
15 Nov 2019
(Rev. 3)
22 Feb 2020 — Approval pending completion of non -plan items (below)
(Rev. 4)
28 Apr 2020 — Aprp oval pending completion of non -plan items (items L-3.)
Reviewer:
David James /Initial; J. Anderson /Rev. 1, 2, 3, 4
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 pending:
1. Revision to SWPPP (items listed at A., below),
2. Acquisition and recordation of easements required to construct the project, and,
3. Written (FES, CAO) County-VDOT Agreement that stipulates maintenance responsibility for the
stormwater detention facility proposed within existing VDOT right-of-way, U.S. Rt. 250.
Albemarle and VDOT appear to be only entities eligible to maintain this SWM facility.
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. Provide a SWPPP including registration statement. (Rev. 1) Not addressed. Please provide SWPPP at
earliest convenience. (Rev. 2) Comment persists. Also see email sent, 11/15/2019 12:39 PM. Use county
template; link:
httn://www.albemarle.oriz/uDload/imaees/forms center/departments/Community Development/forms/Enei
veering and_WPO Forms/Stormwater_Pollution _Prevention _ Plan_ SWPPP_template.pdf
(Rev. 3) Partially addressed. As follow-up:
a. Sec. 1, Registration Statement:
i. Sec. II/B. — Complete address (Recommend `Rt. 250') (Rev. 4) Addressed.
ii. Sec II/C. Complete construction entrance (recommend `Access via Rt. 250 Attached')
(Rev. 4) Addressed.
iii. Sec. IVB. — Enter estimated project start and completion dates (Rev. 4) Partially
addressed. As follow-up: Please consider estimated completion date later than 4/30/2020
that does not impose schedule hardship, especially given covid-19 impacts to county, and
economy. May want to extend completion date to any date prior to Jul 1, 2024, a year or
more from now.
iv. Sec. VI/Certification — Print Name, sign, date (Rev. 4) Persists /pending. M. Mitchell
email (March 16, 2020 9:13 AM): `We can coordinate those signatures with Jack and
Engineering Review Comments
Page 2 of 4
provide the required hard copies once you approve the updates.'
b. Sec. 6, Pollution Prevention Plan:
i. 6A. — Provide 11" x 17" single -sheet Exhibit to show: (Rev. 4) Addressed.
1. Rain gauge
2. Concrete washout (essential; may not be upslope of a near storm inlet)
3. Construction entrance (NA, if work staged entirely from hard surface)
4. Porta-john (may not be upslope of a near storm inlet)
5. Solid waste dumpster; NA, if none
6. Solvent /chemical storage; NA, if none
ii. 6_E. — List individual responsible for PPP practices. `Contractor' is not specific. KHA
personnel or J. Kelsey are eligible, or state `TBD prior to receiving Grading Permit.'
(Rev. 4) Comment persists. SWPPP indicates the individual will be determined prior to
receiving a Grading Permit.
c. Sec. 8: List qualified individual who will perform compliance inspections, or (similar to Sec. 6.E.)
state `TBD prior to receiving Grading Permit.' (Rev. 4) Comment persists. SWPPP indicates the
individual(s) responsible for conducting inspections will be determined prior to receiving a
Grading Permit.
d. Sec. 9: SIGNED CERTIFICATION — Please sign certification. (Rev. 4) Comment persists. Ref. M.
Mitchell /KHA email, March 16, 2020 9:13 AM. Note: Engineering cannot register this project
with DEQ for VPDES permit issuance until Sec. 9 of SWPPP is signed and cannot approve the
plan without SWPPP (Sec. 1, Sec. 9) signatures.
e. Sec. 12: Provide template inspection logs. (Rev. 4) Addressed.
B. Pollution Prevention Plan (PPP) (Rev. 2) Comment persists. See email sent 11/15/2019 12:39 PM.
The PPP content requirements can be found in County Code section 17-404.
1. Provide a PPP. (Rev. 1, 2, 3) Not addressed. Please include PPP Exhibit with SWPPP. This is a single -
sheet exhibit that identifies items of particular relevance to SWPPP; exhibit is distinct from ESC and SWM
plan sheets. See A./ SWPPP/Sec. 6.A., above. (Rev. 4) Addressed.
C. Stormwater Management Plan (SWMP)
VSMP Regulation 9VAC25-870-108 requires the VSMP authority to approve or disapprove a SWMP.
This plan is approved.
1. Cover Sheet — Change application number to WP0201700070; Update box with nutrient credit purchase
information when acquired; Include source & date of topographic information, and last date of field
verification of existing site conditions; missing survey date on sidebar. (Rev. 1) Partially addressed. As
follow-up, please revise ref. to `purchasing 0.78 lbs. phosphorus from xxx Nutrient Bank on xx/xx/xxxx' to
from `Gold Hill Nutrient Credit Offset Bank on 02/05/2019.' (Ref. image, 2bg , be!E)W.; image
removed with Rev. 3 comments) (Rev. 2) Comment persists. Sheet 1 not included with plan /digital
submittal. .PDF preview/ Sheet 1, welcome. (Rev. 3) Addressed. 0.78 lbs. phosphorus credits purchased
from Gold Hill Nutrient Credit Offset Bank on 02/05/2019. Ref plan sheet 1 Note.
2. Who will be responsible for the maintenance of underground detention SWM facilities? (Rev. 1)
Comment withdrawn. SWM facility eliminated per review meeting, 2/14/19 (Jack Kelsey, Frank Pohl, J.
Anderson). UG detention is not required (sheets 3, 31), 6(4), etc.) if runoff conveyed via man-made
channel to 1 % point of analysis. Engineering to confirm design meets 9VAC25-870-66.B. L/4. (Rev. 2)
Comment withdrawn per (design) discussion with J. Kelsey, 11/15/19. Also, 1% point of analysis NA
given energy balance (Outfall A), and Q2-post-development velocity < Q2-pre development Vel. (Outfall B) compliance
methodologies.
3. Show that the channel (ditch) at Outfall A will be non -erosive when meeting 2-yr design, velocity is 15.36
(fps) and considered excessive (>10fps). (Rev. 1) Not addressed; Also, item 2, above. At 2/14 meeting,
Engineering and PMD discussed ditch maintenance, soil stabilization blankets /matting (VESCH 3.36), etc.
Engineering to confirm revised design (final submittal) meets 9VAC25-870-66.B. L/4., that final design 2-
yr, 24-hour event velocities are non -erosive.
Ref table sheet 1H(1): [ image of table removed w Rev. 2 comments ]
Engineering Review Comments
Page 3 of 4
15.42 fps is erosive per VESCH, 31 Edit., 1992, Std. & Spec. 3.36 /P. 111-357: "Treatment-1 is a
degradable soil stabilization blanket ...During the establishment of vegetation, Treatment-1 should not be
subjected to shallow or deep concentrated flow moving at greater than 4 feet/second." Then: "Since
Treatment-2 is non -degradable, it can be used in permanent conveyance channels, and can withstand
higher velocities of flow than the vegetation and soil would normally allow. However, a 10 feet/second
velocity of flow should be the maximum allowed in a conveyance system which utilizes Treatment-2." (p.
III-358) (Rev. 2) Addressed. Re£ plan sheet IH(1) Water Quantity Summary. Also, item 5., below.
4. Contact Ana Kilmer regarding nutrient credit purchase & agreement. Plan cannot be approved without
nutrient purchase agreement. (Rev. 1) Addressed. Ref. A. Kilmer email (2/27/2019 9:56 AM) "FES has
paid for the credits."; and, Dahris Garcia email (February 27, 2019 9:52 AM) "This was paid on 2/21/19 via
check number 200175667."
5. New: Sheet 1H(1) Water Quality and Quantity data sheet: Provide narrative discussing man-made
conveyance capacity to convey the post -development peak flow rate from a two-year 24-hour storm event
without causing erosion of the system. Include capacity and condition of roadside ditch (Ivy Rd.-Rt. 250)
to 1 % limits of analysis. Transportation Engineer may provide further coordinating details to KHA. (Rev.
2) Addressed. Kimley-Horn Assoc. Hydraulic Design Report, Oct-11, 2019, table, p. 23; and water
quantity summary table, plan sheet IH(1), indicate compliance with 9VAC25-870-66. 2-yr. Velocity,
Outfall B =14.49 fps. This is non -erosive since discharge is to an existing manmade storm sewer system.
Outfall A channel protection compliance method is Energy Balance Eq.
6. New: Revise match -line references, sheets 3D and 3E. (Rev. 2) Comment persists. Sheets 3D and 3E not
included. Provide FTP link to WPO Plan set prior to print submittal —will check this item on final plan set.
7. New (Rev. 2) Hydraulic Design Report, WPO Plan, SWPPP must be sealed (signed -dated by PE). (Rev. 3)
Addressed.
D. Erosion and Sediment Control Plan (ESOP)
Virginia Code §62.1-44.15:55 requires the VESCP authority to approve or disapprove an ESOP. This plan
is approved.
1. Remove Roadway Plan including road profiles/sections from this set. (Rev. 1) Partially addressed. As
follow-up: Please remove driveway and Ivy Road (Route 250) profiles from VSMP /WPO Plan set. (Rev. 2)
Persists. Engineering to confirm sheets removed from final Plan set. Request link to final WPO plan set at
earliest convenience. (Rev. 3) Addressed; driveway and road profiles are not included in the VSMP /WPO
plan set.
2. Provide a soils map &description. Show existing conditions sheet (easements deed bk/pg, critical slopes,
etc.). (Rev. 1) Request for soils map withdrawn; unnecessary given project corridor. Existing conditions
shown in sufficient detail across multiple plan sheets.
Please provide 2 print copies of SWPPP (once comments addressed); 4 full-size print copies of VSMP/WPO plan.
Process
After agreements are complete /easements recorded, 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 . The form identifies the contractor and responsible land disturber, and the fee Femaining 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.
Engineering Review Comments
Page 4 of 4
Please also note:
This project is approved pending:
1. Revision to SWPPP (items listed at A., below),
2. Acquisition and recordation of easements required to construct the project, and,
3. Written (FES, CAO) County-VDOT Agreement that stipulates maintenance responsibility for the
stormwater detention facility proposed within existing VDOT right-of-way, U.S. Rt. 250.
Albemarle and VDOT appear to be only entities eligible to maintain this SWM facility.
County forms can be found on the county website forms center under engineering;
http://www.albemarle.org/deptforins.asp?department--cdengwTo