HomeMy WebLinkAboutWPO201900057 Review Comments WPO VSMP 2019-11-14COUNTY 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: Proffit Road Townhomes North
Project file number: WP0201900057
Plan preparer: Shimp Engineering P.C. [keane@shimp-engineering.com]
Owner or rep.: Albemarle Land Development LLC [brent@hallsautobodyinc.com]
Plan received date: 08 Oct 2019
Date of comments: 14 Nov 2019
Reviewers: Emily Cox
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 application may be resubmitted for approval if all
of the items below are satisfactorily addressed. 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. Section 9, signed certification must be signed. Also, it appears it needs to be updated as it currently
says Stony Point Design Build.
B. Pollution Prevention Plan (PPP)
The PPP content requirements can be found in County Code section 17-404.
1. No comments.
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 show the plan number WP0201900057 on the cover sheet.
2. A SWM maintenance agreement must be recorded before plan can be approved. Contact Ana
Kilmer to complete this process. (akilmer(e,albemarle.org or 434-296-5832).
3. Nutrient credits must be purchased before plan can be approved. Contact Ana Kilmer before
purchasing credits. (akilmer&albemarle.org or 434-296-5832).
4. Proposed SWM facility easements as well as the forest & open space easements must be shown on
the plan.
S. All easements, including: SWM facility easements & forest & open space easement must be
recorded on a plat with a deed.
Engineering Review Comments
Page 2 of 3
6. Please add the following note on the plan and plat regarding the forest & open space: "The SWM
Forest and Open Space Easement is subject to the guidance set forth by DEQ in the Virginia
Stormwater Management Program. The areas will remain undisturbed in a natural, vegetated state,
except for activities as approved by the local program authority, such as forest management,
control of invasive species, replanting and revegetating, passive recreation (e.g., trails), and limited
bush hogging to maintain desired vegetative community (but no more than four times a year)."
7. Provide confirmation that Army Corps of Engineers does not need to be involved with intermittent
stream and/or wetlands (as commented by Frank Pohl on the ZMA).
8. There are existing managed slopes on the County GIS. Please show these existing managed slopes
on all applicable sheets of the plan.
9. Ensure this plan is compliant with ZMA201800006 (show buffers/open space on all applicable
sheets, etc.). Also ensure all proffers are met (ZMA says 44 unit, this plan shows 59?).
10. Does this plan match the current ZMA201900010 amendment that was submitted? Any changes
that affect this plan will need to be shown.
11. Provide a note on the plan regarding 2:1 slopes. Ground must be stabilized with something that
can handle steep slopes.
12. Provide signed and sealed retaining wall designs.
13. Provide maintenance requirements for the SWM facility.
14. [Sheet C13] Add access riser manholes at Al and C1 (inlets to the underground detention).
15. [Sheet C 12] Provide manufacturer information allowing 20% and 18% slopes of pipe E2-E 1 &
A2-Al .
16. [SWM Calculations Packet] Maximum allowed velocity is 15 ft/s. Pipe A2- Al is currently 20 ft/s.
17. Please show the existing natural channel where the concentrated runoff from this site outfalls. It is
not clear on the existing conditions or on the BMP details sheet.
18. [SWM Calculations Packet] Provide a legend for the VRRM maps.
19. [SWM Calculations Packet] Provide a channel section from the culvert outfall (F1) to the point of
analysis.
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. [Sheet C6] What is the estimated amount of import necessary? Please add a note on the plans that
the imports must be noted in the SWPPP.
2. [Sheet C61 A critical area is identified in the narrative, however it is not shown on the plans. If the
contractor is to protect this area, it must clearly be shown on the plans.
3. [Sheets C7,8&9] A wash rack (with a place for it to drain) should be shown with all Construction
Entrances (CE). Ensure all phases have a CE. There is not one shown on Sheet C9.
4. [Sheets C7,8&9] TS, PS, MU and DC should be shown on all E&S phases.
5. Is any tree protection necessary? For example, along the proffered undisturbed buffer?
6. Please provide staging/parking/stockpile area locations.
7. [Sheet C7] Provide slopes of the diversion dike. Ensure there is positive drainage to the sediment
basin.
8. [Sheet C10] Please check design of sediment basin. Wet and dry storage should be 301CY for 4.5
AC of drainage area, however 268 CY is shown (for only 4 acres of drainage area?). Calculations
booklet differs from Sheet C 10.
9. [Sheet C 10] Please check design of sediment basin. Detail shows a 406 elevation and design table
shows a 424 elevation. These numbers seem out of place.
10. [Sheet C 10] Please provide a detail of the trash rack / anti vortex device, the riser anchor/base,
Engineering Review Comments
Page 3 of 3
anti -seep collars, and baffles if necessary, as required per VESCH 3.14. It needs to be clear for the
contractor.
11. Show that the flow length is twice the flow width of the sediment basin.
12. Show outlet protection on all applicable sheets and locations. Calculations were provided on Sheet
Cl 1, however no outlet protection was shown on the E&S plans. This includes the inlet(at the end
of DD) and outlet of the sediment basin.
13. [Sheet C8] Please clarify the note which states, "Set up sand bags and pumps ...". This should
have a detail(s) and a sequence of construction, not just a simple note.
14. [Sheet C8] There is a note in the middle of the sheet regarding sequence of construction of lots 18-
21. This should be outlined clearly in a sequence, not just a note on the plan.
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.
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;
hM2://www.albemarle.org/deptfonns.asl2?department=cdenawpo