HomeMy WebLinkAboutWPO202300004 Review Comments WPO VSMP 2023-02-22�.i OF AL8
County of Albemarle
m COMMUNITY DEVELOPMENT DEPARTMENT
VSMP Permit Plan Review
Project title: GLENWOOD ROAD POND
Project file number: WP0202300004
Plan preparer: Justin Shimp [Justin@shimp-engineeing.com]
Owner or rep.: Creekside LC [reid@bmcholdingsgroup.com]
Plan received date: Jan. 19, 2023
Date of comments: Jan. 22, 2023
Reviewer: David James [djames2@albemarle.org]
401 McIntire Road, North Wing
Charlottesville, VA 22902-4579
Telephone: 434- 29 6- 5 832
WWW.ALBEMARLE.ORG
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/approved.
The rationale is given in the comments below. 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. Sign Registration Statement.
2. Sign Sign Certification.
3. Complete other sections prior to pre -con.
4. Note: Engineering will attach the stamped plan to SWPPP.
B. Pollution Prevention Plan (PPP)
The PPP content requirements can be found in County Code section 17-404.
1. Provide the vehicle washing at construction entrance.
2. Provide a concrete washout detail.
C. Stormwater Management Plan (SWMP)
VSMP Regulation 9VAC25-870-108 requires the VSMP authority to approve or disapprove a
SWMP. This plan is denied, 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. C1 & C4 - Please include'SWM Narrative' in title block and for the sheet index.
2. 1 would prefer that information on the type and location of stormwater discharges,
predevelopment and postdevelopment drainage areas be shown on the plans rather
than separately in calc. packet.
3. Provide % land covers on your drainage area pre -/post- dev. maps.
4. C4 - SWM Narrative summary: The plan should refer to the SWM Calculations Packet
(i.e., see stamped sealed Calculations Packet submitted separately).
5. Calcs - Write/Solve the E.B. equation and show where values/variables are found.
9VAC25-870-66 B.3
6. Stamp seal the Calculations Packet.
Engineering Review Comments
Page 2 of 4
7. C3 -Show or callout the e.spillway. In the calcs for the pond report it calls for 10-ft
e.spillway (x 2.00). What does x 2.00 mean & profile 4, may need to show?
8. Show the design WSE's for the pond in the profile. Provide stage -storage for the pond
up to 100-yr design. State 'vegetative' e.spillway or the lining provided.
9. Provide barrel seepage control collar design spacing.
10.Off-site options, such as, purchasing credits should be considered only when PR practice
cannot be implemented to the maximum extent. [DEQ GM 22-2012]
a. A Wet Pond or Ext. Detention would be appropriate pollutant removal (PR)
practice as it provides nutrient load reductions and should be considered where
practicable.
b. Consider F/OS protection since the site is forested.
11. Show SWM facility and access easement for pond.
12. Easement plat will need to be submitted and approved prior to WPO plan approval.
13. Deed of dedication will need to be recorded with the easement plat prior to WPO plan
approval.
14. SWM agreement will need to be approved prior to WPO plan approval.
15. Nutrient credit agreement & purchase of credits will need to be completed prior to
grading permit issuance.
16. Include A.C. As -built (VSMP) checklist.
D. Mitigation Plan (MP)
The mitigation plan requirements can be found in County Code Chapter 17-406.
1. 2:1 ratio mitigation planting area has not been met in the stream buffer (0.64ac
disturbed, 1.28ac mitigation required, 0.64ac provided). This is mainly due to the size of
the pond constructed relative to the available buffer area within parcel. It may need to
be demonstrated why a pond this size is necessary because a reduced size pond can be
constructed to meet 2:1 ratio mitigation planting requirement. (17-604 C.5]
a. It is also an ESD practice to minimize soil disturbance to conserve the soils most
conductive to infiltration & to maximize/retain forest cover. [DEQ GM 22-2012,
p.41]
2. Please include the additional area (highlighted) on the parcel within the buffer area that
I I
z-- PS
_
---
i
114 u -
can be mitigated. a„�, o, :a.._ --- - - --
` '
Engineering Review Comments
Page 3 of 4
3. C7 - Add note that stream bed and banks shall be stabilized within seven (7) days from
start of backfilling for the culvert.117-604 C.4)
4. Provide necessary permit for the stream disturbance.117-604 C.6)
E. 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. Provide County's paved construction entrance detail (ACDSM, p.9), and show sediment
trapping device at or near entrance.
2. Provide DS, VESCH Spec. 3.26 for the excavated pond.
3. Show tree protection (TP) fencing around disturbed perimeter.
4. Note: Inspector may require additional/alternate on -site control measure beyond what
the approved plan shows.
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, erosion and sediment control and stormwater management improvements must
be bonded. The bonding process begins when the plan is approved, and the applicant submits a
bond estimate request form and fee to the Department of Community Development. A plan
reviewer 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 to the
County, who will record the agreement.
After bonding and agreements are complete, county staff enters project information in a DEQ
database for state application processing, if a DEQ permit is required. DEQ reviews 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
Engineering Review Comments
Page 4 of 4
instructions on how to pay fees. When DEQ approves the application, they will issue a permit
coverage letter, which must be posted at the construction site.
After DEQ coverage is issued, via the coverage letter, the County can hold a pre -construction
conference. Applicants must 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;
httos://www.albemarle.oriz/¢overn ment/community-development/aooly-for/engineeri ne-aoolications