HomeMy WebLinkAboutWPO202000041 Review Comments WPO VSMP 2020-10-06�A
COUNTY OF ALBEMARLE
Department of Community Development
r„P 401 McIntire Road, Room 227
Charlottesville, Virginia 22902-4596
Phone (434) 296-5832 Fax (434) 972-4126
VSMP Permit plan review
Project title: Avon Park II Development
Project file number: WP0202000041
Plan preparer: Collins Engineering — Scott Collins [scoff@collins-engineering.com]
Owner or rep.: Stanley Martin Companies, LLC —
Jeremy W. Swink [SwinkJW@stanleymartin.com]
Plan received date: 08 Sept 2020
Date of comments: 06 Oct. 2020
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. The registration statement must be signed.
2. Section 9, signed certification, must be signed.
3. Plans must be updated to include the approved plans.
B. Pollution Prevention Plan (PPP)
The PPP content requirements can be found in County Code section 17-404.
1. Plan must be updated to include the approved plan.
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. Stormwater management agreement must be executed before plan approval. Please contact Ana
Kilmer to begin this process (akilmergalbemarle.org).
2. Nutrient credits must be purchased before plan approval. Please contact Ana Kilmer before
purchasing credits(akilmergWbemarle.org).
3. Please add the WPO # to the cover sheet (WP0202000041).
4. Please show all applicable proposed easements including drainage and SWM facility.
5. Provide the deed book and page for all existing easements, for example, the drainage easement
along Avon Street Extended.
6. Some areas that are changing land cover and increasing runoff do not appear to be including in
any calculations or discussions. For example,
here:
9'6, IV I =
6)�
570
i6°
56
i6'
562
684'
Engineering Review Comments
Page 2 of 4
i G 614-
1
and here: iF� 6
_f
7. SWM regulations state that "Concentrated stormwater flow shall be released into a stormwater
conveyance system." Please clarify the existing conveyance system. Is it a roadside ditch? Is it
the existing 24" CMP? It is unclear on the plans.
8. Ensure the bottom of the SWM basin (SWM2) is lower than the sediment trap(ST #3).
9. Provide the following as -built checklist on the plans:
https://www.albemarle.orgtHome/ShowDocument?id=3381
10. Provide all applicable pipe calculations.
11. Ensure safety slabs are specified in the structures deeper than 12ft.
12. Please add note regarding where roof drains will be tied in.
13. Show positive drainaAg(Te for at least 1Oft from the rear of the houses shown below:
/ wjWIRE MAXIMUM
8F-E............... �yy(VVV,
SF SUPPORT SHALLNO GREBEAT AT RETHAN 3p� 694 11l I III$
WI 696
m� ss
Engineering Review Comments
Page 3 of 4
A 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 put the E&S proffer requirements (Section 4a-d) on a sheet in this plan.
2. Please provide an Overlot Grading Plan Sheet per proffer 9.
3. Please specify a type of grass or land cover that can sustain steep slopes for all slopes steeper than
3:1.
4. Construction entrance needs a wash rack and an area for water to drain and be filtered.
5. Mulching should be shown anywhere there is permanent or temporary seeding.
6. Please add perimeter silt fence in the location shown below to ensure no sediment gets on
7. Is there going to be a stockpile area? If show, please show it on the plan.
8. Is this a balanced site? If not, please provide the cut/fill quantities and location of waste area/fill
dirt.
9. Please add the last sentence of note #5 in the sequence of construction to the phase one a&S plan
sheet, "Measures intended to trap sediment shall be constructed as a first step......... takes place".
10. [Sheet 51 There appears to be a mis-labeled ST area (ST 2=0.71 ac, it says ST 1= 0.71 ac)
11. [Sheet 141 Please ensure the anti -vortex plate is checked on the trash rack detail.
12. Please add note or detail that baffles must extend from the bottom to 6" above the overflow.
13. The spillway of SB 1 appears to be in fill. Vegetative emergency spillways shall not be
constructed over fill material.
14. Show outlet protection dimensions and stone sizes from calculations packet on the applicable
plan sheets. Contractors may not look at the calculations packet.
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;
Engineering Review Comments
Page 4 of 4
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.
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, ajoint 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.orgtdeptforms.asp?department=cdengmTo