HomeMy WebLinkAboutWPO201800013 Review Comments WPO VSMP 2018-11-02Short Review Comments Report for:
WPO201800013
SubApplication Type:
BROOKHILL VSMP FOR ROAD IMPORVEMENT PLAN
Stormwater Management/BMP Plan
Erosion and Sediment Control Plan
Date Completed:03/07/2018
Reviewer:Bobby Jocz CDD Engineering
Review Status:Requested Changes
Reviews Comments:
Division:
Date Completed:07/12/2018
Reviewer:Emily Cox CDD Engineering
Review Status:Requested Changes
Reviews Comments:
Division:
Date Completed:09/25/2018
Reviewer:Emily Cox CDD Engineering
Review Status:Requested Changes
Reviews Comments:
Division:
Date Completed:10/11/2018
Reviewer:Emily Cox CDD Engineering
Review Status:See Recommendations
Reviews Comments:Approved pending execution of the SWM agreement and receipt of letter of permission to work
offsite. Land disturbance permit will not be issued until water quality nutrient credits are purchased.
Division:
Date Completed:11/15/2018
Reviewer:Emily Cox CDD Engineering
Review Status:Approved
Reviews Comments:- no land disturbance permit until nutrient credits are purchased
Division:
Date Completed:11/02/2018
Reviewer:Ana Kilmer CDD
Review Status:Approved
Reviews Comments:2 Agreements were recorded in deed book 05110, page 0279 and 05110, page 0289. ak
Division:
Date Completed:
Reviewer:Emily Cox CDD Engineering
Review Status:Pending
Reviews Comments:
Division:
Page:1 of 1 County of Albemarle Printed On:November 18, 2018
COUNTY 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: Brookhill VSMP for Road Improvement Plan
Project file number: WP0201800013
Plan preparer:
Ryan Yauger, Bohler Engineering [ryauger@bohlereng.com]
Owner or rep.:
Alan Taylor, Riverbend Dev. [Alan@riverbenddev.com]
Plan received date:
February 21St, 2018
Rev. 1 date:
June 121, 2018
Rev. 2 date:
Sept 7th, 2018
Rev. 3 date:
Sept 271, 2018
Date of comments:
March 7th, 2018
Rev. 1 comments:
12 July, 2018
Rev. 2: comments:
Sept 25, 2018
Rev. 3 comments:
11 Oct 2018
Reviewers:
Bobby Jocz
Emily Cox (Rev. 1 &2)
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 approved
pending execution of the SWM agreement and receipt of letter of permission to work offsite.
Land disturbance permit will not be issued until water quality nutrient credits are
purchased. Please provide 4 copies of the plan, 2 copies of signed registration statement and
1 copy of pond routings for stamped approval. 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.
Rev 1: SWPPP not provided. Comment response not provided for any of the SWPPP
comments below. Rev. 2: SWPPP must be updated with approved plans on site. Rev. 3:
Still applies.
1. [Cover Sheet] Provide WPO number [WP020800013] on cover sheet title.
2. [Cover Sheet] Ensure title matches Plan Name, missing `Brookhill" at the beginning.
3. [Cover Sheet] Include DEQ General Construction Permit VAR number. Provide table relating area
of disturbance for this project to that of overall permit coverage.
4. [Cover Sheet] Provide FDP and FEMA Case #. Ensure level spreader and grading/improvements
within floodplain match approved CLOMR.
5. [SWPPP] SWPPP document must be updated to reflect additional area of disturbance. Provide
updated SWPPP documents reflecting the Road Improvement Plan changes. Note: there is no need
Engineering Review Comments
Page 2 of 6
to submit the entire SWPPP document, only relevant updated sheets.
B. Pollution Prevention Plan (PPP)
The PPP content requirements can be found in County Code section 17-404.
Rev 1: PPP not provided. Comment response not provided for the PPP comment below.
Rev. 2: PPP must be updated with approved plans on site.
Rev. 3: still applies.
1. [SWPPP] PPP must be updated to reflect additional development. Provide updated PPP
documents reflecting the Road Improvement VSMP Plan changes.
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.
[General] Topo must be field verified by designer within the past year. Please provide most recent
date of field verification. Rev. 1: Provide date on plans that topography was field verified.
Rev. 2: Comment addressed.
2. [General] Show preserved and managed slopes. Rev. 1: Comment addressed.
3. [General] Provide greater contrast/differentiation between approved/"existing" topography and
proposed grading for current plan. Rev. 1: Comment addressed.
4. [General] Identify and label all SWM facility easements. Rev. 1: Any facility being used for
quality or quantity should be within an easement titled, "SWM facility easement". These
need to be platted and recorded with a SWM Deed. Rev. 2: Easement should not go through
preserved slopes. Rev. 3: Comment addressed.
5. [General] Due to changes in pond riser design for ponds 10 and 11, provide updated SWM
stage/storage curves/routings etc. These may be provided in separate calculations booklet or
electronic submittal. Rev. 1: Calculations not provided. Rev. 2: Comment addressed.
6. [C-106] Ensure all items from the approved ZMA and Stormwater Master Plan are accurately
shown throughout the entire plan. It appears the extent of the stream buffers shown on sheet C-106
do not match that as shown on the approved ZMA. Rev. 1: Comment addressed.
7. [C-202] Provide dimensions for level spreaders (Length). Ensure easement around structure is
labeled. Rev. 1: Level spreaders must meet all requirements of DEQ specification 2.
Specifically, Table 2.2, and Sections 5.1 and 6.3 :
https://www.vwrrc.vt.edu/swc/documents/2013/DEQ%20BMP%2OSpec%2ONo%202 SHE
ET%20FLOW Final%20Draft v1-9 03012011.pdf
Rev. 2: The pipe going to LS -10 should be 15". If needed, use a weir inside the pipe. 6"
pipes are hard to maintain and are prone to clogging. Also, clarify the SWM easements.
The pipes leading to the level spreader (any in the treatment train) must be in an easement
(outside of ROW). Rev. 3: Comment addressed.
8. [C-203] Drainage label area B32 is repeated. Please correct. Rev. 1: Comment addressed.
9. [C-900] Drainage areas do not match those shown on approved plan WP0201700037 sheet C-901
(predevelopment drainage map). Please correct/explain inconsistencies. Remove proposed
stormsewer layer from pre -development drainage area map. Rev. 1: Comment addressed.
10. [C-900] Pre -development curve number for POI -10 inconsistent between what is presented in
stormwater narrative and energy balance table on sheet C-901. Please correct. Rev. 1: Comment
addressed.
11. [C-900] Provide note that for WPO calculations conditions pre -development drainage areas
Engineering Review Comments
Page 3 of 6
are presented as exist prior to land disturbance approved in WP0201700037. Rev. 1: The
plan number for the note is WP0201700037, not 201300037. Rev. 2: Comment addressed.
12. [C-901] Drainage area callouts missing for: area of pond 10 (if being consistent with pond 11), and
area south of Untreated DA (To POI -11) encompassing portions of Route 29. Rev. 1: Comment
addressed.
13. [C-903] VRRM spreadsheet analysis for Drainage Area -D includes more than just the ROW area.
6.13 acres are indicated as included in this DA where 5.02 acres are shown for ROW area on sheet
C-901. Please clarify/correct. Rev. 1: Comment addressed.
14. [C-904] Provide phosphorous removal achieved with proposed plan for Pond 10. Update Plan #s.
Rev. 1: Comment addressed.
15. [C-905] Check Stormwater outfall table for correct figures. The POI -10 CN for the post
development Iyr storm is listed to be 82. In previous sections (energy balance table) this is
identified to be 68. Please correct/clarify. Rev. 1: Comment addressed.
16. [C-905] Culvert reports should note related POI. In addition, the culvert report for POI -11
incorrectly references the involved structures. It should state culvert A40 -Al as shown on
the drainage area maps. Rev. 1: B71 to B70 appears to be missing. Also, reference approved
plan where DA to culverts is shown. For any DA that have changed, show their DA on this
plan. Rev. 2: Please clarify all drainage areas. For example, A40 -A42 says POI -11, however,
the remaining culvert reports do not match with an approved drainage area. Sheet C-910
does not match (A60 -A62 is on Sheet C-905, but not referenced on C-910). Rev. 3: Comment
addressed.
17. [C-905] Please clarify what "10 Year Storm Calculations" table is referencing. Points do not
correlate to any identified structures/points. Rev. 1: Please clarify what 11 A, B, C and D
refer to. Rev. 2: Comment addressed.
18. [C-905] Provide culvert calculations for all proposed culverts along Polo Grounds Road. Rev. 1:
Comment addressed.
19. [C-905] Level spreader design inadequate. Grading does not appear to be sufficient for
continued spread down length of spreader. Design has potential for clogging/high
maintenance requirements. Please re-evaluate design. Rev. 1: See comment 7. Rev. 2: Will
be addressed with comment 7.
20. [C-906] For the pond 10 profile, ensure label arrows correctly line up to features they identify.
Rev. 1: Comment addressed.
21. [C-906] Length and slope of outfall pipe as indicated differs between plan, profile, and riser detail.
Please correct. Rev. 1: Comment addressed.
22. [C-907] Length of outfall pipe as indicated differs between plan, profile, and riser detail. In
addition, profile view presents conflicting values for the 1 and 100yr WSEs. Rev. 1: Comment
addressed.
23. [C-905 & C-9061 Identify changes made to pond area and/or riser structures from
previously approved plans. Profile views should identify changes by showing updated
structures/grading in pre -constructed condition (bold with no opacity). A note should be
provided outlining additional changes. Rev. 1: Only see a note on Sheet C-906. Rev. 2:
Comment addressed.
24. [C-905 & C-9061 Since changes are being made to riser structures and additional
information is provided for drainage areas, provide updated "WPO Conditions" and
structure anti -floatation calculations tables for Ponds 10 and 11. Rev. 1: Since DA changed,
provide pond routings. (see comment 5). Rev. 2: Comment addressed.
25. [C-908] Confirm trash rack design conforms to VDOT standards. Rev. 1: Comment addressed.
26. Rev. 1: Per the code of development (page 23) and the SWM master plan (page 2), SWM
facilities should be located outside of buffer areas, development lots, preserved slopes,
greenway areas, stream buffers and floodplain. Level spreaders appear to be in the stream
Engineering Review Comments
Page 4 of 6
buffer and floodplain. It is unclear if Pond I I's emergency overflow is in preserved slopes.
Rev. 2: Comment addressed.
27. Rev. 1: VSMP Plan must be self-contained and cannot account for future development or
designs. The VRRM spreadsheet should only show facilities that have designs within this
plan or another approved plan. This applies for quality and quantity. Rev. 2: Comment
addressed.
28. Rev. 1: Show maintenance requirements for all SWM facilities on the plan. (Section 9 of the
DEQ specifications). Rev. 2: Comment addressed.
29. Rev. 1: A SWM Maintenance agreement will need to be recorded before plan approval.
Contact Ana Kilmer 434-296-5832 (Ext. 3246) akilmer(&albemarle.org to complete this
process. Rev. 2: Comment still valid. Process has started with Ana. Rev. 3: Comment still
valid.
30. Rev. 1 [C-904] Only provide items in the compliance table that have been designed with this
plan or are designed and approved on another plan. Do not put WPO201800013 in the plan
# column for facilities that are not designed with this plan. Rev. 2: Comment addressed.
31. Rev. 1: Name the plan SR 634 & Brookhill Section 1 Road VSMP Plan or something similar
as discussed with the County Engineer. Rev. 2: Comment addressed.
32. Rev. 1: Create an overall key sheet showing WPO Plan #s and the areas covered. Rev. 2:
Add acreage to this sheet that will match up with the registration statement for the SWPPP.
Rev. 3: Comment addressed.
33. Rev. 1: [C-908] What does BMP detail refer to? Provide more detail. Rev. 2: Provide a
detail for an anti -vortex device for E&S conditions. (plate 3.14-10 of VESCH) Rev. 3:
Comment addressed.
34. Rev. 2: [C-904] Remove note about bonding credits. Credits must be purchased prior to
land disturbance. Plan can be approved, however, grading permit will not be issued until
credits are purchased. Contact Ana Kilmer to complete this process. Rev. 3: Comment
addressed. Credits must be purchased prior to land disturbance.
35. Rev. 2: [C-906 & 907] Riser detail references a trash rack on Sheet C-911. Please update.
Rev. 3: Comment addressed.
36. Rev. 2: [C-907] There is no existing RPA buffer. It is a proposed greenway/open space.
Please re -label. Rev. 3: Comment addressed.
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 approved pending comment below. The erosion control plan content requirements can
be found in County Code section 17-402.
1. [General] provide outlet protection designs for all outlet protection locations. Rev. 1: Comment
addressed.
2. [General] Label stormwater management ponds and level spreaders. Rev. 1: Comment
addressed.
3. [General] Ensure labels for E&S measures do not obscure drainage area/inlet labels. Rev. 1:
Comment addressed.
4. [General] Ensure all existing E&S measures previously installed under WPO201700037 that
are meant to remain through this phase are shown on plans (i.e. Wetland protection/tree
protection fencing, etc.). Provide shading/labeling to indicate that these are existing
measures. Rev. 1: Double check labels are on correct side of grading approved with
WPO201700037 note. Rev. 2: Comment addressed.
5. [General] Show proposed construction entrance, washout, and staging area locations. Rev.
1: Provide construction entrance detail (paved with wash rack). Rev. 2: Comment
Engineering Review Comments
Page 5 of 6
addressed.
6. [C-200] Adjacent to the planned intersection of Route -29 and Road -A, re -grade depression where
culvert inlet is located in previously approved WP0201700037. Unwanted ponding may occur.
Ensure positive drainage to new culvert inlet location. Rev. 1: Comment addressed.
7. [C-201] It appears the orientation of the construction road servicing pond 11 changes from
what is presented in phase III WP0201700037. Please detail this change. Rev. 1: Show
proposed temporary driveway that is proposed with WP0201700037. Rev. 2: Comment
addressed.
8. [C-202] Show/callout salamander crossings. Rev. 1: Comment addressed.
9. [C-206] Provide manufactures detail for Gutter buddy. Variance will be need for DEQ
approval. Rev. 1: Provide manufacturer's specification for the SWPPP Book with a request
to use them. Detail is not sufficient. Rev. 2: Comment addressed.
10. Rev. 1: [C-201] Provide a note for phasing. Site fence is shown through grading of the pond.
Rev. 2: Comment addressed.
11. Rev. 1: [C-200, C-2021 Ensure all facilities are within perimeter controls (dumpster, staging
area, toilets etc). Rev. 2: Comment addressed.
Level spreaders and grading improvements are shown offsite. Provide information showing
permission to do this work. Rev. 2: Comment still valid. Rev. 3: Comment still valid.
Approval contingent on receipt of this letter/agreement.
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
Engineering Review Comments
Page 6 of 6
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=cdengwno
Emily Cox
Albemarle County
Community Development — Engineering
ecox@albemarle.org
(434) 296-5832 ext. 3565
COUNTY 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: Brookhill VSMP for Road Improvement Plan
Project file number: WP0201800013
Plan preparer:
Ryan Yauger, Bohler Engineering [ryauger@bohlereng.com]
Owner or rep.:
Alan Taylor, Riverbend Dev. [Alan@riverbenddev.com]
Plan received date:
February 21st, 2018
Rev. 1 date:
June 121, 2018
Rev. 2: date:
Sept Th, 2018
Date of comments:
March 71, 2018
Rev. 1 comments:
12 July, 2018
Rev. 2: comments:
Sept 25, 2018
Reviewers:
Bobby Jocz
Emily Cox (Rev. 1 &2)
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.
Rev 1: SWPPP not provided. Comment response not provided for any of the SWPPP
comments below. Rev. 2: SWPPP must be updated with approved plans on site.
1. [Cover Sheet] Provide WPO number [WP020800013] on cover sheet title.
2. [Cover Sheet] Ensure title matches Plan Name, missing `Brookhill" at the beginning.
3. [Cover Sheet] Include DEQ General Construction Permit VAR number. Provide table relating area
of disturbance for this project to that of overall permit coverage.
4. [Cover Sheet] Provide FDP and FEMA Case #. Ensure level spreader and grading/improvements
within floodplain match approved CLOMR.
5. [SWPPP] SWPPP document must be updated to reflect additional area of disturbance. Provide
updated SWPPP documents reflecting the Road Improvement Plan changes. Note: there is no need
to submit the entire SWPPP document, only relevant updated sheets.
B. Pollution Prevention Plan (PPP)
The PPP content requirements can be found in County Code section 17-404.
Rev 1: PPP not provided. Comment response not provided for the PPP comment below.
Engineering Review Comments
Page 2 of 6
Rev. 2: PPP must be updated with approved plans on site.
1. [SWPPP] PPP must be updated to reflect additional development. Provide updated PPP
documents reflecting the Road Improvement VSMP Plan changes.
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.
[General] Topo must be field verified by designer within the past year. Please provide most recent
date of field verification. Rev. 1: Provide date on plans that topography was field verified.
Rev. 2: Comment addressed.
2. [General] Show preserved and managed slopes. Rev. 1: Comment addressed.
3. [General] Provide greater contrast/differentiation between approved/'existing" topography and
proposed grading for current plan. Rev. 1: Comment addressed.
4. [General] Identify and label all SWM facility easements. Rev. 1: Any facility being used for
quality or quantity should be within an easement titled, "SWM facility easement". These
need to be platted and recorded with a SWM Deed. Rev. 2: Easement should not go through
preserved slopes.
5. [General] Due to changes in pond riser design for ponds 10 and 11, provide updated SWM
stage/storage curves/routings etc. These may be provided in separate calculations booklet or
electronic submittal. Rev. 1: Calculations not provided. Rev. 2: Comment addressed.
6. [C-106] Ensure all items from the approved ZMA and Stormwater Master Plan are accurately
shown throughout the entire plan. It appears the extent of the stream buffers shown on sheet C-106
do not match that as shown on the approved ZMA. Rev. 1: Comment addressed.
7. [C-202] Provide dimensions for level spreaders (Length). Ensure easement around structure is
labeled. Rev. 1: Level spreaders must meet all requirements of DEQ specification 2.
Specifically, Table 2.2, and Sections 5.1 and 6.3 :
https://www.vwrrc.vt.edu/swc/documents/2013/DEQ%20BMP%20SPec%2ONo%202 SHE
ET%20FLOW Final%20Draft vI-9 03012011.pdf
Rev. 2: The pipe going to LS-10 should be 15". If needed, use a weir inside the pipe. 6"
pipes are hard to maintain and are prone to clogging. Also, clarify the SWM easements.
The pipes leading to the level spreader (any in the treatment train) must be in an easement
(outside of ROW).
8. [C-203] Drainage label area B32 is repeated. Please correct. Rev. 1: Comment addressed.
9. [C-900] Drainage areas do not match those shown on approved plan WP0201700037 sheet C-901
(predevelopment drainage map). Please correct/explain inconsistencies. Remove proposed
stormsewer layer from pre -development drainage area map. Rev. 1: Comment addressed.
10. [C-900] Pre -development curve number for POI-10 inconsistent between what is presented in
stormwater narrative and energy balance table on sheet C-901. Please correct. Rev. 1: Comment
addressed.
11. [C-900] Provide note that for WPO calculations conditions pre -development drainage areas
are presented as exist prior to land disturbance approved in WP0201700037. Rev. 1: The
plan number for the note is WP0201700037, not 201300037. Rev. 2: Comment addressed.
12. [C-901 ] Drainage area callouts missing for: area of pond 10 (if being consistent with pond 11), and
area south of Untreated DA (To POI-11) encompassing portions of Route 29. Rev. 1: Comment
addressed.
Engineering Review Comments
Page 3 of 6
13. [C-903] VRRM spreadsheet analysis for Drainage Area-D includes more than just the ROW area.
6.13 acres are indicated as included in this DA where 5.02 acres are shown for ROW area on sheet
C-901. Please clarify/correct. Rev. 1: Comment addressed.
14. [C-904] Provide phosphorous removal achieved with proposed plan for Pond 10. Update Plan #s.
Rev. 1: Comment addressed.
15. [C-905] Check Stormwater outfall table for correct figures. The POI-10 CN for the post
development Iyr storm is listed to be 82. In previous sections (energy balance table) this is
identified to be 68. Please correct/clarify. Rev. 1: Comment addressed.
16. [C-905] Culvert reports should note related POI. In addition, the culvert report for POI-11
incorrectly references the involved structures. It should state culvert A40-Al as shown on
the drainage area maps. Rev. 1: B71 to B70 appears to be missing. Also, reference approved
plan where DA to culverts is shown. For any DA that have changed, show their DA on this
plan. Rev. 2: Please clarify all drainage areas. For example, A40-A42 says POI-11, however,
the remaining culvert reports do not match with an approved drainage area. Sheet C-910
does not match (A60-A62 is on Sheet C-905, but not referenced on C-910).
17. [C-905] Please clarify what "10 Year Storm Calculations" table is referencing. Points do not
correlate to any identified structures/points. Rev. 1: Please clarify what 11 A, B, C and D
refer to. Rev. 2: Comment addressed.
18. [C-905] Provide culvert calculations for all proposed culverts along Polo Grounds Road. Rev. 1:
Comment addressed.
19. [C-905] Level spreader design inadequate. Grading does not appear to be sufficient for
continued spread down length of spreader. Design has potential for clogging/high
maintenance requirements. Please re-evaluate design. Rev. 1: See comment 7. Rev. 2: Will
be addressed with comment 7.
20. [C-906] For the pond 10 profile, ensure label arrows correctly line up to features they identify.
Rev. 1: Comment addressed.
21. [C-906] Length and slope of outfall pipe as indicated differs between plan, profile, and riser detail.
Please correct. Rev. 1: Comment addressed.
22. [C-907] Length of outfall pipe as indicated differs between plan, profile, and riser detail. In
addition, profile view presents conflicting values for the 1 and 100yr WSEs. Rev. 1: Comment
addressed.
23. [C-905 & C-9061 Identify changes made to pond area and/or riser structures from
previously approved plans. Profile views should identify changes by showing updated
structures/grading in pre -constructed condition (bold with no opacity). A note should be
provided outlining additional changes. Rev. 1: Only see a note on Sheet C-906. Rev. 2:
Comment addressed.
24. [C-905 & C-906] Since changes are being made to riser structures and additional
information is provided for drainage areas, provide updated "WPO Conditions" and
structure anti -floatation calculations tables for Ponds 10 and 11. Rev. 1: Since DA changed,
provide pond routings. (see comment 5). Rev. 2: Comment addressed.
25. [C-908] Confirm trash rack design conforms to VDOT standards. Rev. 1: Comment addressed.
26. Rev. 1: Per the code of development (page 23) and the SWM master plan (page 2), SWM
facilities should be located outside of buffer areas, development lots, preserved slopes,
greenway areas, stream buffers and floodplain. Level spreaders appear to be in the stream
buffer and floodplain. It is unclear if Pond I I's emergency overflow is in preserved slopes.
Rev. 2: Comment addressed.
27. Rev. 1: VSMP Plan must be self-contained and cannot account for future development or
designs. The VRRM spreadsheet should only show facilities that have designs within this
plan or another approved plan. This applies for quality and quantity. Rev. 2: Comment
addressed.
Engineering Review Comments
Page 4 of 6
28. Rev. 1: Show maintenance requirements for all SWM facilities on the plan. (Section 9 of the
DEQ specifications). Rev. 2: Comment addressed.
29. Rev. 1: A SWM Maintenance agreement will need to be recorded before plan approval.
Contact Ana Kilmer 434-296-5832 (Ext. 3246) akilmerAalbemarle.org to complete this
process. Rev. 2: Comment still valid. Process has started with Ana.
30. Rev. 1 [C-904] Only provide items in the compliance table that have been designed with this
plan or are designed and approved on another plan. Do not put WP0201800013 in the plan
# column for facilities that are not designed with this plan. Rev. 2: Comment addressed.
31. Rev. 1: Name the plan SR 634 & Brookhill Section 1 Road VSMP Plan or something similar
as discussed with the County Engineer. Rev. 2: Comment addressed.
32. Rev. 1: Create an overall key sheet showing WPO Plan #s and the areas covered. Rev. 2:
Add acreage to this sheet that will match up with the registration statement for the SWPPP.
33. Rev. 1: [C-908] What does BMP detail refer to? Provide more detail. Rev. 2: Provide a
detail for an anti -vortex device for E&S conditions. (plate 3.14-10 of VESCH)
34. Rev. 2: [C-904] Remove note about bonding credits. Credits must be purchased prior to
land disturbance. Plan can be approved, however, grading permit will not be issued until
credits are purchased. Contact Ana Kilmer to complete this process.
35. Rev. 2: [C-906 & 907] Riser detail references a trash rack on Sheet C-911. Please update.
36. Rev. 2: [C-907] There is no existing RPA buffer. It is a proposed greenway/open space.
Please re -label.
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. [General] provide outlet protection designs for all outlet protection locations. Rev. 1: Comment
addressed.
2. [General] Label stormwater management ponds and level spreaders. Rev. 1: Comment
addressed.
3. [General] Ensure labels for E&S measures do not obscure drainage area/inlet labels. Rev. 1:
Comment addressed.
4. [General] Ensure all existing E&S measures previously installed under WP0201700037 that
are meant to remain through this phase are shown on plans (i.e. Wetland protection/tree
protection fencing, etc.). Provide shading/labeling to indicate that these are existing
measures. Rev. 1: Double check labels are on correct side of grading approved with
WP0201700037 note. Rev. 2: Comment addressed.
5. [General] Show proposed construction entrance, washout, and staging area locations. Rev.
1: Provide construction entrance detail (paved with wash rack). Rev. 2: Comment
addressed.
6. [C-200] Adjacent to the planned intersection of Route-29 and Road -A, re -grade depression where
culvert inlet is located in previously approved WP0201700037. Unwanted ponding may occur.
Ensure positive drainage to new culvert inlet location. Rev. 1: Comment addressed.
7. [C-201] It appears the orientation of the construction road servicing pond 11 changes from
what is presented in phase III WP0201700037. Please detail this change. Rev. 1: Show
proposed temporary driveway that is proposed with WP0201700037. Rev. 2: Comment
addressed.
8. [C-202] Show/callout salamander crossings. Rev. 1: Comment addressed.
9. [C-206] Provide manufactures detail for Gutter buddy. Variance will be need for DEQ
approval. Rev. 1: Provide manufacturer's specification for the SWPPP Book with a request
Engineering Review Comments
Page 5 of 6
to use them. Detail is not sufficient. Rev. 2: Comment addressed.
10. Rev. 1: [C-201] Provide a note for phasing. Site fence is shown through grading of the pond.
Rev. 2: Comment addressed.
11. Rev. 1: [C-200, C-202] Ensure all facilities are within perimeter controls (dumpster, staging
area, toilets etc). Rev. 2: Comment addressed.
12. Level spreaders and grading improvements are shown offsite. Provide information showing
permission to do this work. Rev. 2: Comment still valid.
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
work may begin.
County forms can be found on the county website forms center under engineering;
http://www.albemarle. org/deptforms.asp?department=cdengwno
Bobby Jocz
Albemarle County
Community Development — Engineering
Engineering Review Comments
Page 6 of 6
r ocz@albemarle.org
(434) 296-5832 ext. 3283
COUNTY 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: Brookhill VSMP for Road Improvement Plan
Project file number: WP0201800013
Plan preparer:
Ryan Yauger, Bohler Engineering [ryauger@bohlereng.com]
Owner or rep.:
Alan Taylor, Riverbend Dev. [Alan@riverbenddev.com]
Plan received date:
February 21st, 2018
Rev. 1 date:
June 121, 2018
Date of comments:
March T", 2018
Rev. 1 comments:
12 July, 2018
Reviewers:
Bobby Jocz
Emily Cox (Rev. 1)
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.
*Rev 1: SWPPP not provided. Comment response not provided for any of the SWPPP
comments below.
1. [Cover Sheet] Provide WPO number [WP020800013] on cover sheet title.
2. [Cover Sheet] Ensure title matches Plan Name, missing `Brookhill" at the beginning.
3. [Cover Sheet] Include DEQ General Construction Permit VAR number. Provide table relating area
of disturbance for this project to that of overall permit coverage.
4. [Cover Sheet] Provide FDP and FEMA Case #. Ensure level spreader and grading/improvements
within floodplain match approved CLOMR.
5. [SWPPP] SWPPP document must be updated to reflect additional area of disturbance. Provide
updated SWPPP documents reflecting the Road Improvement Plan changes. Note: there is no need
to submit the entire SWPPP document, only relevant updated sheets.
B. Pollution Prevention Plan (PPP)
The PPP content requirements can be found in County Code section 17-404.
*Rev 1: PPP not provided. Comment response not provided for the PPP comment below.
1. [SWPPP] PPP must be updated to reflect additional development. Provide updated PPP
documents reflecting the Road Improvement VSMP Plan changes.
Engineering Review Comments
Page 2 of 5
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. [General] Topo must be field verified by designer within the past year. Please provide most recent
date of field verification. Rev. 1: Provide date on plans that topography was field verified.
2. [General] Show preserved and managed slopes. Rev. 1: Comment addressed.
3. [General] Provide greater contrast/differentiation between approved/"existing" topography and
proposed grading for current plan. Rev. 1: Comment addressed.
4. [General] Identify and label all SWM facility easements. Rev. 1: Any facility being used for
quality or quantity should be within an easement titled, "SWM facility easement'. These
need to be platted and recorded with a SWM Deed.
5. [General] Due to changes in pond riser design for ponds 10 and 11, provide updated SWM
stage/storage curves/routings etc. These may be provided in separate calculations booklet or
electronic submittal. Rev. 1: Calculations not provided.
6. [C-106] Ensure all items from the approved ZMA and Stormwater Master Plan are accurately
shown throughout the entire plan. It appears the extent of the stream buffers shown on sheet C-106
do not match that as shown on the approved ZMA. Rev. 1: Comment addressed.
7. [C-202] Provide dimensions for level spreaders (Length). Ensure easement around structure is
labeled. Rev. 1: Level spreaders must meet all requirements of DEQ specification 2.
Specifically, Table 2.2, and Sections 5.1 and 6.3 :
https://www.vwrre.vt.edu/swc/documents/2013/DEQ%20BMP%2OSpec%2ONo %202_SHE
ET%20FLOW_Final%20Draft v1-9_03012011.pdf
8. [C-203] Drainage label area B32 is repeated. Please correct. Rev. 1: Comment addressed.
9. [C-900] Drainage areas do not match those shown on approved plan WP0201700037 sheet C-901
(predevelopment drainage map). Please correct/explain inconsistencies. Remove proposed
stormsewer layer from pre -development drainage area map. Rev. 1: Comment addressed.
10. [C-900] Pre -development curve number for POI-10 inconsistent between what is presented in
stormwater narrative and energy balance table on sheet C-901. Please correct. Rev. 1: Comment
addressed.
11. [C-900] Provide note that for WPO calculations conditions pre -development drainage areas
are presented as exist prior to land disturbance approved in WP0201700037. Rev. 1: The
plan number for the note is WP0201700037, not 201300037.
12. [C-901 ] Drainage area callouts missing for: area of pond 10 (if being consistent with pond 11), and
area south of Untreated DA (To POI-11) encompassing portions of Route 29. Rev. 1: Comment
addressed.
13. [C-903] VRRM spreadsheet analysis for Drainage Area-D includes more than just the ROW area.
6.13 acres are indicated as included in this DA where 5.02 acres are shown for ROW area on sheet
C-901. Please clarify/correct. Rev. 1: Comment addressed.
14. [C-904] Provide phosphorous removal achieved with proposed plan for Pond 10. Update Plan #s.
Rev. 1: Comment addressed.
15. [C-905] Check Stormwater outfall table for correct figures. The POI-10 CN for the post
development lyr storm is listed to be 82. In previous sections (energy balance table) this is
identified to be 68. Please correct/clarify. Rev. 1: Comment addressed.
16. [C-905] Culvert reports should note related POI. In addition, the culvert report for POI-11
incorrectly references the involved structures. It should state culvert A40-Al as shown on
Engineering Review Comments
Page 3 of 5
the drainage area maps. Rev. 1: B71 to B70 appears to be missing. Also, reference approved
plan where DA to culverts is shown. For any DA that have changed, show their DA on this
plan.
17. [C-905] Please clarify what "10 Year Storm Calculations" table is referencing. Points do not
correlate to any identified structures/points. Rev. 1: Please clarify what 11 A, B, C and D
refer to.
18. [C-905] Provide culvert calculations for all proposed culverts along Polo Grounds Road. Rev. 1:
Comment addressed.
19. [C-905] Level spreader design inadequate. Grading does not appear to be sufficient for
continued spread down length of spreader. Design has potential for clogging/high
maintenance requirements. Please re-evaluate design. Rev. 1: See comment 7.
20. [C-906] For the pond 10 profile, ensure label arrows correctly line up to features they identify.
Rev. 1: Comment addressed.
21. [C-906] Length and slope of outfall pipe as indicated differs between plan, profile, and riser detail.
Please correct. Rev. 1: Comment addressed.
22. [C-907] Length of outfall pipe as indicated differs between plan, profile, and riser detail. In
addition, profile view presents conflicting values for the 1 and 100yr WSEs. Rev. 1: Comment
addressed.
23. [C-905 & C-906] Identify changes made to pond area and/or riser structures from
previously approved plans. Profile views should identify changes by showing updated
structures/grading in pre -constructed condition (bold with no opacity). A note should be
provided outlining additional changes. Rev. 1: Only see a note on Sheet C-906.
24. [C-905 & C-906] Since changes are being made to riser structures and additional
information is provided for drainage areas, provide updated "WPO Conditions" and
structure anti -floatation calculations tables for Ponds 10 and 11. Rev. 1: Since DA changed,
provide pond routings. (see comment 5).
25. [C-908] Confirm trash rack design conforms to VDOT standards. Rev. 1: Commc..L auu1,_3n,_U.
26. Rev. 1: Per the code of development (page 23) and the SWM master plan (page 2), SWM
facilities should be located outside of buffer areas, development lots, preserved slopes,
greenway areas, stream buffers and floodplain. Level spreaders appear to be in the stream
buffer and floodplain. It is unclear if Pond 11's emergency overflow is in preserved slopes.
27. Rev. 1: VSMP Plan must be self-contained and cannot account for future development or
designs. The VRRM spreadsheet should only show facilities that have designs within this
plan or another approved plan. This applies for quality and quantity.
28. Rev. 1: Show maintenance requirements for all SWM facilities on the plan. (Section 9 of the
DEQ specifications).
29. Rev. 1: A SWM Maintenance agreement will need to be recorded before plan approval.
Contact Ana Kilmer 434-296-5832 (Ext. 3246) akilmerAalbemarle.org to complete this
process.
30. Rev. 1 [C-904] Only provide items in the compliance table that have been designed with this
plan or are designed and approved on another plan. Do not put WP0201800013 in the plan
# column for facilities that are not designed with this plan.
31. Rev. 1: Name the plan SR 634 & Brookhill Section 1 Road VSMP Plan or something similar
as discussed with the County Engineer.
32. Rev. 1: Create an overall key sheet showing WPO Plan #s and the areas covered.
33. Rev. 1: [C-908] What does BMP detail refer to? Provide more detail.
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
Engineering Review Comments
Page 4 of 5
plan content requirements can be found in County Code section 17-402.
1. [General] provide outlet protection designs for all outlet protection locations. Rev. 1: Comment
addressed.
2. [General] Label stormwater management ponds and level spreaders. Rev. 1: Comment
addressed.
3. [General] Ensure labels for E&S measures do not obscure drainage area/inlet labels. Rev. 1:
Comment addressed.
4. [General] Ensure all existing E&S measures previously installed under WP0201700037 that
are meant to remain through this phase are shown on plans (i.e. Wetland protection/tree
protection fencing, etc.). Provide shading/labeling to indicate that these are existing
measures. Rev. 1: Double check labels are on correct side of grading approved with
WP0201700037 note.
5. [General] Show proposed construction entrance, washout, and staging area locations. Rev.
1: Provide construction entrance detail (paved with wash rack).
6. [C-200] Adjacent to the planned intersection of Route-29 and Road -A, re -grade depression where
culvert inlet is located in previously approved WP0201700037. Unwanted ponding may occur.
Ensure positive drainage to new culvert inlet location. Rev. 1: Comment addressed.
7. [C-201] It appears the orientation of the construction road servicing pond 11 changes from
what is presented in phase III WP0201700037. Please detail this change. Rev. 1: Show
proposed temporary driveway that is proposed with WP0201700037.
8. [C-202] Show/callout salamander crossings. Rev. 1: Comment addressed.
9. [C-206] Provide manufactures detail for Gutter buddy. Variance will be need for DEQ
approval. Rev. 1: Provide manufacturer's specification for the SWPPP Book with a request
to use them. Detail is not sufficient.
10. Rev. 1: [C-201] Provide a note for phasing. Site fence is shown through grading of the pond.
11. Rev. 1: [C-200, C-2021 Ensure all facilities are within perimeter controls (dumpster, staging
area, toilets etc).
12. Level spreaders and grading improvements are shown offsite. Provide information showing
permission to do this work.
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
Engineering Review Comments
Page 5 of 5
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;
http://www.albemarle. ore/deDtforms.asD?department=cdenewpo
Bobby Jocz
Albemarle County
Community Development — Engineering
r ocz@albemarle.org
(434) 296-5832 ext. 3283
COUNTY 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: Brookhill VSMP for Road Improvement Plan
Project file number: WP0201800013
Plan preparer: Ryan Yauger, Bohler Engineering [ryauger@bohlereng.com]
Owner or rep.: Alan Taylor, Riverbend Dev [Alan@riverbenddev.com]
Plan received date: February 21st, 2018
Date of comments: March T', 2018
Reviewers: Bobby Jocz
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. [Cover Sheet] Provide WPO number [WP020800013] on cover sheet title.
2. [Cover Sheet] Ensure title matches Plan Name, missing `Brookhill" at the beginning.
3. [Cover Sheet] Include DEQ General Construction Permit VAR number. Provide table relating area
of disturbance for this project to that of overall permit coverage.
4. [Cover Sheet] Provide FDP and FEMA Case #. Ensure level spreader and grading/improvements
within floodplain match approved CLOMR.
5. [SWPPP] SWPPP document must be updated to reflect additional area of disturbance. Provide
updated SWPPP documents reflecting the Road Improvement Plan changes. Note: there is no need
to submit the entire SWPPP document, only relevant updated sheets.
B. Pollution Prevention Plan (PPP)
The PPP content requirements can be found in County Code section 17-404.
1. [SWPPP] PPP must be updated to reflect additional development. Provide updated PPP
documents reflecting the Road Improvement VSMP Plan changes.
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. [General] Topo must be field verified by designer within the past year. Please provide most recent
date of field verification.
Engineering Review Comments
Page 2 of 4
2. [General] Show preserved and managed slopes.
3. [General] Provide greater contrast/differentiation between approved/"existing" topography and
proposed grading for current plan.
4. [General] Identify and label all SWM facility easements.
5. [General] Due to changes in pond riser design for ponds 10 and 11, provide updated SWM
stage/storage curves/routings etc. These may be provided in separate calculations booklet or
electronic submittal.
6. [C-106] Ensure all items from the approved ZMA and Stormwater Master Plan are accurately
shown throughout the entire plan. It appears the extent of the stream buffers shown on sheet C-106
do not match that as shown on the approved ZMA.
7. [C-202] Provide dimensions for level spreaders (Length). Ensure easement around structure is
labeled.
8. [C-203] Drainage label area B32 is repeated. Please correct.
9. [C-900] Drainage areas do not match those shown on approved plan WPO201700037 sheet C-901
(predevelopment drainage map). Please correct/explain inconsistencies. Remove proposed
stormsewer layer from pre -development drainage area map.
10. [C-900] Pre -development curve number for POI-10 inconsistent between what is presented in
stormwater narrative and energy balance table on sheet C-901. Please correct.
11. [C-900] Provide note that for WPO calculations conditions pre -development drainage areas are
presented as exist prior to land disturbance approved in WPO201700037.
12. [C-901 ] Drainage area callouts missing for: area of pond 10 (if being consistent with pond 11), and
area south of Untreated DA (To POI-11) encompassing portions of Route 29.
13. [C-903] VRRM spreadsheet analysis for Drainage Area-D includes more than just the ROW area.
6.13 acres are indicated as included in this DA where 5.02 acres are shown for ROW area on sheet
C-901. Please clarify/correct.
14. [C-904] Provide phosphorous removal achieved with proposed plan for Pond 10. Update Plan #s.
15. [C-905] Check Stormwater outfall table for correct figures. The POI-10 CN for the post
development lyr storm is listed to be 82. In previous sections (energy balance table) this is
identified to be 68. Please correct/clarify.
16. [C-905] Culvert reports should note related POI. In addition, the culvert report for POI -I I
incorrectly references the involved structures. It should state culvert A40-Al as shown on the
drainage area maps.
17. [C-905] Please clarify what "10 Year Storm Calculations" table is referencing. Points do not
correlate to any identified structures/points.
18. [C-905] Provide culvert calculations for all proposed culverts along Polo Grounds Road.
19. [C-905] Level spreader design inadequate. Grading does not appear to be sufficient for continued
spread down length of spreader. Design has potential for clogging/high maintenance requirements.
Please re-evaluate design.
20. [C-906] For the pond 10 profile, ensure label arrows correctly line up to features they identify.
21. [C-906] Length and slope of outfall pipe as indicated differs between plan, profile, and riser detail.
Please correct.
22. [C-907] Length of outfall pipe as indicated differs between plan, profile, and riser detail. In
addition, profile view presents conflicting values for the 1 and 100yr WSEs.
23. [C-905 & C-906] Identify changes made to pond area and/or riser structures from previously
approved plans. Profile views should identify changes by showing updated structures/grading in
pre -constructed condition (bold with no opacity). A note should be provided outlining additional
changes.
24. [C-905 & C-906] Since changes are being made to riser structures and additional information is
provided for drainage areas, provide updated "WPO Conditions" and structure anti -floatation
calculations tables for Ponds 10 and 11.
Engineering Review Comments
Page 3 of 4
25. [C-908] Confirm trash rack design conforms to VDOT standards.
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. [General] provide outlet protection designs for all outlet protection locations.
2. [General] Label stormwater management ponds and level spreaders.
3. [General] Ensure labels for E&S measures do not obscure drainage area/inlet labels.
4. [General] Ensure all existing E&S measures previously installed under WPO201700037 that are
meant to remain through this phase are shown on plans (i.e. Wetland protection/tree protection
fencing, etc.). Provide shading/labeling to indicate that these are existing measures.
5. [General] Show proposed construction entrance, washout, and staging area locations.
6. [C-200] Adjacent to the planned intersection of Route-29 and Road -A, re -grade depression where
culvert inlet is located in previously approved WPO201700037. Unwanted ponding may occur.
Ensure positive drainage to new culvert inlet location.
7. [C-201 ] It appears the orientation of the construction road servicing pond 11 changes from what is
presented in phase 111 WPO201700037. Please detail this change.
8. [C-202] Show/callout salamander crossings.
9. [C-206] Provide manufactures detail for Gutter buddy. Variance will be need for DEQ approval.
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.
Engineering Review Comments
Page 4 of 4
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.or /g deptforms.asp?department=cdengMoo
Bobby Jocz
Albemarle County
Community Development — Engineering
rjocz@albemarle.org
(434) 296-5832 ext. 3283