HomeMy WebLinkAboutWPO202100007 Review Comments WPO VSMP 2021-03-10Phone (434) 296-5832
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COUNTY OF ALBEMARLE
Department of Community Development
401 McIntire Road, Room 227
Charlottesville, Virginia 22902-4596
Fax (434) 972-4126
VSMP Permit plan review
Brookhill Blocks 16 & 17
WPO20210007
Collins Engineering — Scott Collins [scoff@collins-engineering.com]
Crockett Corporation c/o Alan Taylor [alan@riverbenddev.com]
08 Feb 2021
10 Mar 2021
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. Is this plan requesting its own DEQ permit or to be apart of the overall Brookhill permit? The
registration statement in the SWPPP currently shows it to be its own new permit.
2. Please include an overall coverage map with VAR numbers for Brookhill.
B. Pollution Prevention Plan (PPP)
The PPP content requirements can be found in County Code section 17-404.
1. No objection. Please update if there are any changes before approval.
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. SWM Agreement must be executed before plan approval. Please contact Ana Kilmer
[akilmer@albemarle.org or 434-296-5832 ext. 3246] to complete his process.
2. Please provide approved FDP plan that shows proposed improvements in floodplain.
3. This plan must be reviewed and approved by DCR for the DBIZ before this WPO can be
approved.
Engineering Review Comments
Page 2 of 3
4. Please provide a grading sheet. Ensure this sheet shows the tops and bottoms of all retaining walls
as well as all sensitive areas (greenway, steep slopes, buffers, etc.).
5. Please show all applicable buffers on all sheets (Polo Grounds Buffer, Perimeter Buffer) as
outlined in 2.4.2 of the Code of Development.
6. Please provide a detail for proposed retaining walls.
7. [Sheet 151 There is a significant area outside of the drainage sub areas that appears to be
unaccounted for. This area is a change in land cover and increased sheet flow. Please show a map
with the areas used in the VRRM.
8. Please show that there will be no impacts downstream from the increased sheet flow per
9VAC25-870-66-D.
9. Please show where will roof drains be directed.
10. Per the code of development, section 2.4.1 (page 18), there shall be no E&S or SWM in the
Greenway. Level spreader was not reviewed since it is currently shown in the Greenway.
11. Please provide the excel files for 1) VRRM and 2) overall brookhill tracking.
12. Provide more access manholes in the underground detention system.
13. Minimum orifice size is 3". Wet pond B appears to be proposing a 2.5" orifice.
14. Storm pipe outfalls shall be released into a stormwater conveyance system. Both basins A & B do
not appear to outfall into a channel.
15. There were no floodplain impacts shows on the ZMA near proposed Basin A, therefore it should
not be disturbed.
16. Provide pipe calculations for all pipes from SWM facilities to outfall point.
17. Mitigation sheet should not be necessary since Greenway cannot be disturbed as shown.
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 21 Please show the DB & PG for all existing easements.
2. [Sheet 21 Please show current existing conditions. For example, there is no building in block 3.
Also, are the culverts and pedestrian tunnel under polo grounds installed or proposed? If they are
not installed yet, this plan cannot rely on them.
3. Ensure there are no slopes steeper than 2:1. For all slopes steeper than 3:1, please specify
landscaping that can withstand these slopes.
4. Is this a balanced site? Or will there be importlexport? Please show a stockpile area.
5. [Sheet 16] Ensure the anti -vortex plate option is checked for the trash rack.
6. Please specify how risers in basins will be anchored on the E&S sheets, do not refer to SWM
sheets. Also, same thing for anti -seepage collars. Contractor needs to be clear on the details
needed for E&S.
7. Provide a detail for the proposed baffles. Ensure the detail states that baffles must extend from the
bottom to 6" above the overflow.
8. The bottom elevation of dry detention basin A should be lower than the E&S Sediment Basin A.
9. Preserved slopes and Greenway should only be disturbed as approved on the ZMA. Some grading
and limits of clearing appear to touch preserved slopes and greenway. Limits of clearing should
stay approx.. 5ft from these areas to prevent disturbance.
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 Review Comments
Page 3 of 3
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.
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 emalls 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;
http://www.albemarle.org/deptforms.asp?department=cdengmVo