HomeMy WebLinkAboutWPO201800092 Review Comments WPO VSMP 2020-03-05COUNTY 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:
Foothill Crossing Phase VI West
Project file number:
WP0201800092
Plan preparer:
Collins Engineering [scott@collins-engineering.com]
Owner or rep.:
Glenbrook, LLC [alan@riverbenddev.com]
Plan received date:
10 Dec 2018
Rev. 1 received date:
17 April 2019
Rev. 2 received date:
31 Jan 2020
Date of comments:
15 Jan 2019
Rev. 1 comments: 20 May 2019
Rev. 2 comments: 04 Mar 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 ESOP, (3) a SWMP, and (4) any TMDL measures necessary.
1. SWPPP not provided. Please provide SWPPP with all associated requirements. Rev. 1: Provide
signed registration statement(section 1) and signed certification (section 9). Rev. 2:
Comment addressed.
2. Rev. 1: Provide the 2019 registration along with the 2014
https://www.deq.virginia.gov/Portals/0/DEQ/Water/Stormwater
Management/CGPo20ADA/CGPo20Registrationo20Statemento202019
FINAL 201904.pdf?ver=2019-05-01-163955-110
Rev. 2: Comment addressed.
3. Rev. 2: Narrative on sheet 3 notes and additional 2.13 AC of area to be disturbed for
emergency access. This needs to be shown on the registration statement, unless it is covered
by another permit. The submitted registration statement only shows the 4.93 ac, not the
additional 2.13 ac. Please clarify.
B. Pollution Prevention Plan (PPP)
The PPP content requirements can be found in County Code section 17-404.
1. PPP not provided. If E&S plan is to be used, please note that and ensure all requirements in 17-
404 are shown on the plan. Rev. 1: Comment addressed.
Engineering Review Comments
Page 2 of 4
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. Professional seal should be signed and dated. Calculations packet should also have a signed
professional seal. Rev. 1: Comment not addressed. Rev. 2: Comment addressed.
2. [Sheet 5]Check contours between buildings in the southeastern corner of the site. Rev. 1:
Comment addressed.
3. Provide as -built checklist on plans.
hitp://www.albemarle.org/upload/images/forms center/departments/Community_ Development/fo
rms/En ing eering and WPO Forms/WPO VSMP Construction Record Drawings Policy
gy20l4.pdf Rev. 1: Comment addressed.
4. Bottom elevation of proposed storm pond should be lower than the proposed sediment basin. Rev.
1: Elevation appears to be 646 for both of them? Rev. 2: Comment addressed.
5. Provide easement around pond and access road labeled as SWM facility. Rev. 1: The proposed
easement line is unlcear and hard to follow. Rev. 2: The extent of this easement is still hard to
follow. The darker linetype is visible, however, please ensure entire easement is shown on
the page. Does it overlap with any storm drain easements? It is unclear.
6. Pond must comply with quantity design requirements for #15 on
https://www.swbmp.vwrrc.vt.edu/ 2:1 slopes are not allowed. A safety bench should be provided
since the pond is so deep. Quality aspects do not apply (pre-treatment, filtering, etc). Let us know
if you have any questions. Rev 1: Comment addressed.
7. The plan currently does not meet the energy balance requirement. Consider other means and
methods to meet this requirement. Perhaps use underdrains without the 3" orifice? Or other runoff
reduction practices on site. Rev. 1: The plan still does not meet the energy balance. Rev. 2:
Comment addressed.
8. Nutrient credits must be purchased before construction can begin. Please contract Ana
Kilmer (434-296-5832 ext 3246) to start this process. Do not buy credits before speaking
with Ana. Rev. 1: Comment still applies. Rev. 2: Comment still applies.
9. A stormwater management maintenance agreement will need to be executed before the plan
can be approved. Rev. 1: Comment still applies. Rev. 2: Comment still applies.
10. An easement plat with a deed will need to be approved and executed before the plan can be
approved. Rev. 1: Comment still applies. Rev. 2: Comment still applies. Plat is necessary,
but can be done with the subdivision plat, if there will be one.
11. Update vicinity map to match current County GIS. Rev. 1: Comment addressed.
12. [Sheet 6] Show different staging water surface elevations on the section detail. Rev. 1: Comment
addressed.
13. Add a note to the plan stating that the maximum slope is 2:1 (no slope shall be steeper than 2:1 or
something similar). Rev. 1: Comment addressed.
14. Rev. 1: The stream buffer is not shown correctly. Per the county code 17-600: The stream buffer shall
be no less than one hundred (100) feet wide on each side of any perennial stream and contiguous
nontidal wetlands, measured horizontally from the edge of the contiguous nontidal wetlands, or the
top of the stream bank if no wetlands exist Rev. 2: Comment addressed.
15. Rev. 2: Please show that the buildable areas of the lots are outside of the buffers.
16. Rev. 2: Please provide a mitigation plan for the proposed disturbance to the buffer.
17. Rev. 2: Please update the existing conditions sheet to accurately show adjacent areas. This plan
will be tying in to the approved, proposed conditions, not the existing conditions currently
shown.
18. Rev. 2: Please review location of the sanitary sewer in the buffer. Per County Code 17-402-B-2,
Engineering Review Comments
Page 3 of 4
disturbance in the buffer should be minimized.
19. Rev. 2: Provide design for the proposed culvert (drainage area, etc.).
20. Rev. 2: Please clarify the areas used in the VRRM spreadsheet. Was the area for the emergency
access road included? Sheet 6 areas do not add up to the 6.28 acres shown in the VRRM
spreadsheet.
21. Rev 2: Please coordinate with the County Parks and Recreation Department regarding the
Greenway. There needs to be enough room to fit a trail. The location of the stormwater outfall
might not leave enough room. Please contact Dan Mahon, Dan Mahon
<DMAHON@albemarle.org>.
D. Erosion and Sediment Control Plan (ESOP)
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. Proposed 2:1 slopes must specify a type of ground cover or grass that can withstand steep slopes.
Rev. 1: Note should not be on Sheet 4, Phase 1. It needs to be specified on the sheet showing
final grades. Rev. 2: Comment addressed.
2. Limits of clearing and grading should not coincide with the property line or tree protection and
silt fence, etc. Rev. 1: Comment addressed.
3. [Sheet 3] Provide paved construction entrance with wash rack detail from the County Design
Standards Manual, Page 8:
hiip://www.albemarle.org/upload/images/fonns center/departments/community_ development/for
ms/design_ standards_manual/Albemarle _County _ Design_ Standards_Manual _2015 -04-
25_draft.pdf. Rev. 1: Sheet 3 still shows stone construction entrance detail in addition to the
paved detail.. Rev. 2: Comment addressed.
4. [Sheet 3] Provide outlet protection detail and calculations for sizing based on proposed
flow/velocity. Rev. 1: Detail was provided, however calculations/sizing were not. The
calcualtions in the booklet are sufficient, however the sizing must be provided on the plans for the
contractor.. Rev. 2: Comment addressed.
5. [Sheet 4] Proposed diversion dike to sediment basin will not function. There is a low point in the
southeastern portion of the site. The diversion cannot turn 90 degrees north. It must have a
positive grade to the outlet. Rev. 1: Comment addressed.
6. Provide safety fence alone the western property boundary to protect the existing single family
houses. Rev. 1: Location of safety fence is not evident on the plans.. Rev. 2: Comment
addressed.
7. Rev. 2: Provide sequence of construction and details for installation of the culvert under the
emergency access road (stream diversion, etc.).
8. Rev. 2: Provide Army Corps of Engineers permit for work in the stream.
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.
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;
htip://www.albemarle.org/deptforms.asp?department=cdenDUo