HomeMy WebLinkAboutWPO201900010 Review Comments WPO VSMP 2019-03-27COUNTY 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: Earlysville Subdivision
Project file number: AT0201900010
Plan preparer: Clint Shifflett [clint.shifflett@timmons.com]
Timmons Group
Owner or rep.: Luke Kitelinger [kitelinger@yahoo.com]
Bella Signature Homes, LLC
Plan received date: 21 Feb 2019
Date of comments: 27 Mar 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. Provide signed registration statement (section 1) and signed certification (section 9).
B. Pollution Prevention Plan (PPP)
The PPP content requirements can be found in County Code section 17-404.
1. No objections.
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. Proposed conservation easement should be labeled as "SWM Forest & Open Space." Any Forest
and Open Space used in the VRRM worksheet will need to be shown on an Easement Plat and
labeled as 'SWM Forest and Open Space'. Easement plat application can be found here:
http://www.albemarle.org/upload/images/forms center/departm
ents/Community Development/forms/Subdivision Applications/E
asement Plat & Checklist.pdf
2. The following note will need to be placed on both the VSMP plan and the Easement Plat:"The
SWM Forest and Open Space Easement is subject to the guidance set forth by DEQ in the
Engineering Review Comments
Page 2 of 4
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)." Please also update the note on the cover sheet under stormwater to reference forest
& open space, not conservation easements. Also, on Sheet C7.0 in the water quality analysis.
3. A SWM maintenance agreement will be necessary before the plan can be approved. Please contact
Ana Kilmer (akilmer(&albemarle.org or 434-296-5832 ext to begin that process.
4. Provide SWM facility easement around SWM-1 and the level spreader.
5. Show DB&PG for all existing easements.
6. Sheet 4 narrative states that stormwater quality is being treated by grass channels and a level 1
extended detention pond, however the design calculations & narrative show forest & open space as
the only quality facility. Please clarify.
7. The concentrated stormwater flow from SWM-1 must be released into a stormwater conveyance
system per 9VAC25-870-66. There is no channel at the current proposed outfall location. The
buffer may be disturbed for this outfall, however there must be a mitigation plan for the
disturbance.
8. Lot 4 appears to need a driveway culvert. Please show size, design, etc on the plan.
9. Provide a drainage area map. This should show DA to all culverts, ditches, etc.
10. Road ditch section should be 3:1 or flatter (2:1 is shown). Per VDOT APPENDIX B(1) —
SUBDIVISION STREET DESIGN GUIDE, FigureB(1)-8, Minimum ditch width (front slope)
should be 4 feet or greater, based on slopes of 3:1 or flatter (Gentler slopes promote homeowner
maintenance of ditches).
11. Please review storm sewer design computations on Sheet C6.0. It appears the lower invert is
incorrect, which is showing a slope less than the minimum 0.5%. The profile appears correct.
12. Show calculations for the pipe from the riser to the SWM-1 outfall.
13. Engineering appreciates the hatches and areas shown on Sheet C7.0. It is very useful to distinguish
the areas used in the VRRM spreadsheet. Q
14. Please review analysis point location. The outfall at SWM-1 is the only concentrated stormwater
flow. Energy balance can be used at this outfall point. If the current analysis point is used, you
must show that all channels to that point are adequate. Also, please address flood protection at that
point.
15. Provide design calculations for the level spreader. Drainage area, sizing, etc.
16. Top of dam elevation on Sheet C7.2 says 537. Believe this should be 557. Please review and
revise.
17. SWM-1 should meet al applicable design requirements for water quantity based on BMP
clearinghouse, including side Slopes: Side slopes leading to the ED pond should generally have a
gradient of 4H:1 V to 5H:1 V. Section 6.6:
https://www.swbmp.vwrrc.vt.edu/wp—
content/uploads/2017/11/BMP—Spec—No-15 EXT—DETENTION-
POND v1-9 03012011.pdf
18. Provide maintenance requirements for the SWM facilities.
19. Provide as -built checklist on the plan. It can be found here:
http://www.albemarle.org/upload/images/forms center/departm
ents/Community Development/forms/applications/WPO VSMP Cons
truction Record Drawings Policv 23Mav2014.pdf
D. Erosion and Sediment Control Plan (ESOP)
Virginia Code §62.1-44.15:55 requires the VESCP authority to approve or disapprove an ESCP.
Engineering Review Comments
Page 3 of 4
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. Provide paved construction entrance detail from page 8 of the Albemarle county design standards
manual:
http://www.albemarle.org/upload/images/forms_center/departments/community development/for
ms/design standards_ manual/Albemarle_County D_ esign Standards_Manual _2015-04-
25_draft.pdf
2. Provide a wash rack with a place for the water to settle out at the construction entrance.
3. Provide temporary seeding (TS) symbol on E&S plan. Only permanent seeding was shown.
4. Offsite water appears to be draining towards the site from the north. This does not appear to be
considered in any of the calculations and drainage areas.
5. Provide design specifications for outlet protection (size and dimensions) and specify them on the
plans. Detail is not sufficient and requires contractors to try to figure out requirements.
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
Engineering Review Comments
Page 4 of 4
work may begin.
County forms can be found on the county website forms center under engineering;
hqp://www.albemarle.org/deptfonns.asp?department--cdengno