HomeMy WebLinkAboutWPO201700037 Review Comments WPO VSMP 2017-12-20Phone (434) 296-5832
COUNTY OF ALBEMARLE
Department of Community Development
401 McIntire Road, Room 227
Charlottesville, Virginia 22902-4596
VSMP Permit plan review
Fax (434) 972-4126
Project title:
Brookhill Section 1 Block 4A and Block 8A
Project file number:
WP0201700037
Plan preparer:
Bohler Engineering — Ryan Yauger [ryauger@bohlereng.com]
Owner or rep.:
Riverbend Development — Alan Taylor [alan@riverbenddev.com]
Plan received date:
19 April 2017
Rev. 1 received date:
01 Aug 2017
Rev. 2 received date:
28 Sept 2017
Rev. 3 received date:
30 Oct 2017
Rev. 4 received date:
11 Nov 2017
Date of comments:
02 June 2017
Rev. 1 comments:
08 Sept 2017
Rev. 2 comments:
27 Oct 2017
Rev. 3 comments:
8 Nov 2017
Rev. 4 comments:
20 Dec 2017
Reviewers:
Geoff Elsie
Emily Cox
Frank Pohl
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
submission and approval/recordation of the SWM agreement. 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. SWPPP was not provided with this submission. Provide two copies of a SWPPP. Rev. 1: SWPPP
provided. Please provide two copies of the SWPPP at plan approval. Rev. 2: Comment addressed.
Ensure the plan sheets are updated with any revisions before approval.
2. Ensure that the SWPPP contains a signed registration statement and a signed certification (section
1 and 9 of this template) -
http://www.albemarle.orgLupload/images/forms_center/departments/Community Development/for
ms/Engineering—and WPO _Forms/Stormwater_Pollution _ Prevention_ Plan_ SWPPP template.pdf
Rev. 1: Comment not addressed. Rev. 2: Comment addressed.
Engineering Review Comments
Page 2 of 6
B. Pollution Prevention Plan (PPP)
The PPP content requirements can be found in County Code section 17-404.
1. PPP was not provided with this submission. Provide two copies of a PPP and ensure it contains
everything as outlined in County Code section 17-404. Rev. 1: Comment addressed. If any
changes are made with the next submission, ensure it is updated. Rev. 2: Comment addressed.
Ensure the plan sheets are updated with any revisions 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.
[General] Consider re -naming plan to be Section 1, Block 4 and Block 8, PHASE A(or however
you are intending to break down the sections/blocks/phase submissions). Rev. 1: Comment
addressed.
2. Please provide the date & source of the topographic information. Rev. 1: Comment addressed.
3. [Cover Sheet] Remove WPO Plan title and re -name it VSMP Plan. Also, include
WPO201700037 in the title. Rev. 1: Comment addressed.
4. [Cover Sheet] Remove the signature block. Rev. 1: Comment addressed.
5. [Cover Sheet] Include the approved ZMA (#201500007) in the references block. Rev. 1:
Comment addressed.
6. [General] Ensure all items from the approved ZMA and Stormwater Master Plan are accurately
shown throughout the entire plan - floodplain, steep slopes, greenway, open space, buffers,
cemeteries, etc (There is no RPA buffer in Albemarle County). Note that no additional disturbance
will be allowed in any buffers, etc. than what is shown on the approved ZMA. Rev. 1: These items
are still insufficiently shown. They need to be shown on all sheets to ensure no grading is incurring
in buffers, etc. There are also buffers along Polo Grounds Road and Route 29. Ensure the only
grading/disturbance that occurs is what is allowed by the Code of Development and approved
ZMA. Rev. 2: Comment addressed.
7. [C-600(and throughout plan] The proposed driveway is not shown on the ZMA or overlot grading
plan. Please remove or provide note if it is temporary/will be removed. Rev. 1: Comment
addressed.
8. [Phase IV E&S] Please clarify the sediment basin and pond nomenclature. (Example.... sheet C-
613 says sediment basin 10, however it is actually POND 10, as presented in the calculations and
drainage area calculations). Rev 1: Comment addressed.
9. [C-621] Provide drainage divide map for the channels and culvert calculations. Rev. 1: Comment
addressed.
10. [C-902] There are two SWM 10-3 channels labeled. Please clarify. Rev. 1: Comment addressed.
11. [C-902] Please clarify drainage areas (Example Drainage area 4B is going to Pond 4?). Rev. 1:
Comment addressed.
12. Please provide all SWM stage/storage curves/routings, etc. These may be provided in a
calculations booklet. Rev. 1: Comment addressed.
13. Please explain the purpose of the WPO condition vs. the ultimate condition. If WPO & ultimate
are different phases, provide details & calculations for each phase. Rev. 1: Comment addressed.
14. Please provide the emergency spillway designs for the ponds. Rev. 1: Please clarify. The sediment
basin calculations say without spillway and have N/A, however spillways are shown on the plans
for all of the ponds. Also, on Sheet C-627, the detail for pond 4 says with spillway, but the
calculations say N/A. Rev. 2: The overall sheet C-603 still shows the spillways. Please remove.
Engineering Review Comments
Page 3 of 6
Rev. 3: Comment addressed.
15. [C-903] There is a note on the left side of the page that differs from the note on Sheet C-907
regarding Pond 4. Please clarify. Rev 1: Comment still valid. Sheet C-906 still has a note that says
this pond 4 is for quantity only, not quality. However, Sheet C-900 says all ponds are used for
quantity and quality. Please remove this note on Sheet C-906. Rev. 2: This note is still shown on
sheet C-907. Please remove. Rev. 3: Comment addressed.
16. Please check all drainage areas. (Example: DA 4B treated appears to be incorrect). Rev. 1:
Comment addressed.
17. [C-907] This VRRM spreadsheet needs to be correlated with the overall SWM master plan for the
Brookhill development. Please revise. Also, provide the tracking spreadsheet from the SWM
master plan to update with this plan. Rev. 1: Comment addressed.
18. [C-907] The VRRM spreadsheet references facilities that were not shown on this plan
(bioretention, infiltration, etc.). Please show all proposed facilities and their designs on this plan.
Please also show their maintenance schedules (based on Section 9 of the DEQ specification for
each type of facility). Rev. 1: Please clarify the drainage areas used in the VRRM spreadsheet
(what do A, B, C and D correspond to?). Rev. 2: Drainage areas were clarified for B, D, C, and E,
however drainage area A was missing. It appears that the summary was repeated, instead of
including drainage area A. Rev. 3: Comment addressed.
19. Please show a SWM facility easement around each proposed facility. Rev. l: Comment addressed.
20. Stormwater Management Facilities Maintenance agreements will need to be completed and
recorded. The County's Management Analyst (Ana Kilmer) 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. Rev. 1: Comment still valid. Rev. 2: Comment not
addressed. This must be recorded before plan approval. Rev. 3 & 4: Comment still valid.
21. A SWM deed and easement plat will need to be recorded before plan approval. Rev. 1: The
County Engineer has decided that this plat can be completed with each final WPO submission that
show the ultimate development conditions on site. Rev. 2 Comment addressed.
22. Rev. 1: [C-903] Culvert 2 calculations show a 15" pipe, but the plans call for an 18" pipe. Please
clarify. The length is also different (52' vs 57'). Rev. 2: Comment addressed.
23. Rev 1: [C-900] Please show the drainage area to POI 5 to illustrate how it is meeting the I% rule.
Rev. 2: Comment addressed.
24. Rev. 1: [C-902] Please clarify the drainage areas to culvert 1, 2, and 3. Rev. 2: Comment
addressed.
25. Rev. 1: [C-903, C-904] There are calculations for culverts 4, 10 and 11. Please clarify their
locations and drainage areas on the plans. Rev. 2: Comment addressed.
26. Rev. 1: Per page 10 of DEQ Spec No. 14 for wet ponds, side slopes should be 4:1 or 5:1. The
proposed 2:1 is not acceptable for the final condition of the pond. Rev. 2: Comment addressed.
27. Rev. 1: Per page 11 of DEQ Spec No. 14 for wet ponds, provide a landscape planting plan. Rev. 2:
Comment addressed.
28. Rev. 1: Per page 16 of DEQ Spec No. 14 for wet ponds, the bottom elevation of the wet pond
should be lower than the elevation of the temporary sediment basin. Rev. 2: Comment addressed.
29. Rev. 1: As requested in previous comment 18, please show the maintenance schedules for the
proposed SWM facilities. (section 9 of the DEQ spec.). Rev. 2: Comment addressed.
30. Rev 1: Per 9VAC25-870-66, all concentrated flows must be discharged into a conveyance system.
Even if the Energy Balance is used, stormwater must still be released into a channel. Please
ensure you are meeting this regulation. (For example, pond 4 outfall does not appear to go to a
channel). Rev. 2: Ensure that the proposed channel extends to the existing channel. (example,
Pond 10 appears to stop short). Rev. 3: Comment addressed.
31. Rev 1: Provide profiles and calculations for all drainage pipes. (example, the pipes leaving pond
Engineering Review Comments
Page 4 of 6
11). Rev. 2: 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 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. Show all existing easements (access, drainage, sight, sanitary easements, etc.) with deed book
references, locations and dimensions. Rev. 1: Comment not addressed. Ensure DB & PG is shown
for all easements. Rev. 2: Comment addressed.
2. Show temporary seeding, permanent seeding and dust control symbols on all E&S sheets. Rev. 1:
Comment addressed.
3. Site specific details for Temporary Slope Drain (TSD) sizing need to be provided. Rev. 1:
Comment addressed. However, please add the TSD to your E&S legend and ensure TSD is labeled
at all locations. Rev. 2: Comment addressed.
4. Naming of Sediment Basins needs to be consistent, Phase IV sequence does not match plans. Rev.
1: Comment addressed.
5. Sheet C-604, adjust Clearing Limits to capture Diversion Dike. Rev. 1: Comment addressed.
6. Combine Phase 1 and Phase 2 Erosion and Sediment Control Plan into one phase to simplify
overall phasing. Rev. 1: Comment addressed.
7. Confirm that Culvert & Culvert Inlet Protection is not needed at the Construction Entrance located
at the Borrow Area. Rev. 1: Comment addressed.
8. Details for the proposed Turf Ditch are needed. Rev. 1: Comment addressed.
9. Paved Construction Entrances (not stone) are needed for projects in the development areas over 10
acres. (See Engineering Design Standards Manual section 3F for detail). Ensure that all references
to a stone CE are removed from the plan. Rev. 1: Comment addressed.
10. Adjust grading on plan to allow Silt Fence to be installed 5 to 7 feet (minimum) beyond base of a
slope per VESCH requirement. Rev. 1: Provide note on plans regarding the need to use super silt
fence a minimum of 4ft below the base of any fill slopes. Rev. 2: Comment addressed.
11. Provide copies of additional permits that have been obtained (ACOE, DEQ, etc). Rev. 1:
Comment still valid. Rev. 2. Plan cannot be approved until all applicable permits are
obtained and provided to the County. Rev. 3 & 4: Comment addressed. Provide copy of
CLOMR letter once received.
12. Provide right-of-way diversions at construction entrances. Rev. 1: Comment addressed.
13. Provide outlet protection designs for all outlet protection locations. Rev. 1: Outlet protection sizing
was provided for ponds and diversion dikes, but not for pipes. Example, sheet C-623, OP is
specified, but design is not shown. Rev. 2: Comment addressed.
14. Please explain the 25' clearing buffer. Rev. 1: Provide note on the plans explaining this buffer is to
install initial perimeter controls. Rev. 2: Comment addressed.
15. Provide drainage area maps for the sediment basins. Rev. 1: Comment addressed.
16. Ensure that the entire site has perimeter controls. (Example Sheet C-613 — provide perimeter
control silt fence). Rev. 1: Comment addressed.
17. The Phase IV Sequence of Construction on sheets C-611 to C-615 does not appear to match the
plans. Please revise. Rev. 1: Comment addressed.
18. Please clearly outline the sequence of construction on sheet C-103. Include the names of basins
and ponds to be installed/converted, etc. Also, why is Phase II proposing the removal of all
facilities and then a new pre -con for Phase III? Rev. 1: Comment mostly addressed. Sheet C-103
still mentions basin 4A in the Phase III sequence. Rev. 2: Comment addressed.
19. The basin ID on sheet C-620 appears to be incorrect. It says I IA, but it should be 10. Rev. 1:
Engineering Review Comments
Page 5 of 6
Comment addressed.
20. Crownvetch is allowed per VESCH, but recommend using a noninvasive species (see page 3 of
this document):
http://www.deq.vir ig�nia.gov/Portals/0/DEQ/Water/Publications/NativelnvasiveFAQ.pdf
Rev 1: Crownvetch is still referenced on a few sheets. (C-610 is one). Rev. 2: Comment
addressed.
21. Rev 1: [C-102] The note in the detail for the driveway says it will be used in Phase II, please
correct to Phase I. The note also states that a final design will be provided once CBRs are received.
This is not necessary. Rev. 2: Comment addressed.
22. Rev. 1: VDOT entrance permit is required for all entrances off of VDOT roads. Rev. 2: VDOT
permit is necessary for construction entrances. Rev. 3: Comment addressed.
23. Rev. 1: [C-602] Provide DD label. Rev. 2: Comment addressed.
24. Rev. 1: [C-602] Ensure existing and proposed contours are labeled. Rev. 2: Comment addressed.
25. Rev. 1: [C-603] Narrative note #4 says construct road, however this was done in Phase 1. Also,
note #9 should say phase II is complete, not phase 1. Rev. 2: Comment addressed.
26. Rev. 1: Specify stone to be placed at the staging areas. Rev. 2: Comment addressed.
27. Rev. 1: [C-615, C-623] There is a symbol that does not appear in the legend. It looks like a
ditch/swale. Please clarify. Provide calculations if it is a channel for water. Rev. 2: Comment
addressed.
28. Rev. 1: Add temporary slope drain to your legend where applicable. Rev. 2: Comment addressed.
29. Rev. 1: [C-620] Show inlet and outlet protection for the driveway culvert. Rev. 2: Comment
addressed.
30. Rev. 1: [C-623] There is another symbol not provided in the legend which leads to rip -rap. Please
clarify. If it is a channel, provide the calculations. Rev. 2: Comment addressed.
31. Rev. 1: Ponds 10 and 11 calculations show baffles are required, however they are not shown on
the plan view. Rev. 2: Comment addressed.
32. Rev. 1: Please differentiate clean water diversions vs. regular diversion dikes. (CWD vs DD).
Ensure CWD is shown in the legend and details. Rev. 2: Comment addressed.
33. Rev. 1: [C-605] There appears to be a channel/swale to direct water to pond 11. Please show
calculations to ensure it can handle the flow and there is no erosive velocity. Rev. 2: Comment
addressed.
34. Rev. 1: Ensure all silt fence adjacent to storm pipes is extended up and around the pipe outfall.
Rev. 2: Comment addressed.
35. Rev 1: [C-622 & 623] There are channels shown to rip -rap. These should be sediment traps.
Specify the areas to them, the slopes of the channels, etc. Rev. 2: Comment addressed.
36. Rev. 1: Consider adding sheet numbers to your sheet keys. It would really help with navigating the
plans. Rev. 2: Comment addressed.
37. Rev. 2: Add a note to the plan sheets for basins with baffles that states that the contractor and
inspector will meet and agree on the best location for the baffles in the basins based on site
conditions. Rev. 3: Comment addressed.
38. Rev. 2: The legend and notes on Sheet C-616 are not legible. Rev. 3: Comment addressed.
39. Rev. 2: [C-623] Recommend straightening Swale 5. The curves promote erosion. Rev. 3:
Comment addressed.
40. Rev. 2: Ensure RWD is provided at all travelway crossings. (examples: sheets C-605, C-621, C-
616 and C-620, DD is crossing the gravel access road) Rev. 3: Comment addressed.
41. Rev 2: [C-620] DD is going straight through the staging area. Please revise. Rev. 3: Comment
addressed.
42. Rev 2: [C-609 and C-611] Provide inlet protection for the existing culverts. Rev. 3: Comment
addressed.
Engineering Review Comments
Page 6 of 6
43. Rev. 2: [C-622] There is OP shown with no channel? Please remove. Rev. 3: Comment
addressed.
44. Rev. 2: [C-615] Swale 1 should not start parallel with the contours. Consider starting about 50'
from the current proposed start. Rev. 3: Comment addressed.
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.
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. orv,/deptforms. asp?department=cdengno
Phone (434) 296-5832
COUNTY OF ALBEMARLE
Department of Community Development
401 McIntire Road, Room 227
Charlottesville, Virginia 22902-4596
VSMP Permit plan review
Fax (434) 972-4126
Project title:
Brookhill Section 1 Block 4A and Block 8A
Project file number:
WP0201700037
Plan preparer:
Bohler Engineering — Ryan Yauger [ryauger@bohlereng.com]
Owner or rep.:
Riverbend Development — Alan Taylor [alan@riverbenddev.eom]
Plan received date:
19 April 2017
Rev. 1 received date:
01 Aug 2017
Rev. 2 received date:
28 Sept 2017
Rev. 3 received date:
30 Oct 2017
Date of comments:
02 June 2017
Rev. 1 comments:
08 Sept 2017
Rev. 2 comments:
27 Oct 2017
Rev. 3 comments:
8 Nov 2017
Reviewers:
Geoff Elsie
Emily Cox
Frank Pohl
County Code section 17-410 and Virginia Code §621-44.15:34 requires the VSMP authority to
act on any VSMP permit by issuing a project approval or denial. This project is approved pending
submission and approval/recordation of the SWM agreement. 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.
SWPPP was not provided with this submission. Provide two copies of a SWPPP. Rev. 1: SWPPP
provided. Please provide two copies of the SWPPP at plan approval. Rev. 2: Comment addressed.
Ensure the plan sheets are updated with any revisions before approval.
Ensure that the SWPPP contains a signed registration statement and a signed certification (section
1 and 9 of this template) -
httn://www.albemarle.ora/ui3load/ima2es/forms center/departments/Community Development/for
ms/Enaineerina and WPO Forms/Stormwater Pollution Prevention Plan SWPPP template.pdf
Rev. 1: Comment not addressed. Rev. 2: Comment addressed.
B. Pollution Prevention Plan (PPP)
The PPP content requirements can be found in County Code section 17-404.
Engineering Review Comments
Page 2 of 6
PPP was not provided with this submission. Provide two copies of a PPP and ensure it contains
everything as outlined in County Code section 17-404. Rev. 1: Comment addressed. If any
changes are made with the next submission, ensure it is updated. Rev. 2: Comment addressed.
Ensure the plan sheets are updated with any revisions 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
stonnwater management plan content requirements can be found in County Code section 17-403.
[General] Consider re -naming plan to be Section 1, Block 4 and Block 8, PHASE A(or however
you are intending to break down the sections/blocks/phase submissions). Rev. 1: Comment
addressed.
2. Please provide the date & source of the topographic information. Rev. 1: Comment addressed.
3. [Cover Sheet] Remove WPO Plan title and re -name it VSMP Plan. Also, include
WPO201700037 in the title. Rev. 1: Comment addressed.
4. [Cover Sheet] Remove the signature block. Rev. 1: Comment addressed.
5. [Cover Sheet] Include the approved ZMA (#201500007) in the references block. Rev. l:
Comment addressed.
6. [General] Ensure all items from the approved ZMA and Stormwater Master Plan are accurately
shown throughout the entire plan - floodplain, steep slopes, greenway, open space, buffers,
cemeteries, etc (There is no RPA buffer in Albemarle County). Note that no additional disturbance
will be allowed in any buffers, etc. than what is shown on the approved ZMA. Rev. 1: These items
are still insufficiently shown. They need to be shown on all sheets to ensure no grading is incurring
in buffers, etc. There are also buffers along Polo Grounds Road and Route 29. Ensure the only
grading/disturbance that occurs is what is allowed by the Code of Development and approved
ZMA. Rev. 2: Comment addressed.
7. [C-600(and throughout plan] The proposed driveway is not shown on the ZMA or overlot grading
plan. Please remove or provide note if it is temporary/will be removed. Rev. 1: Comment
addressed.
8. [Phase IV E&S] Please clarify the sediment basin and pond nomenclature. (Example.... sheet C-
613 says sediment basin 10, however it is actually POND 10, as presented in the calculations and
drainage area calculations). Rev l: Comment addressed.
9. [C-621] Provide drainage divide map for the channels and culvert calculations. Rev. 1: Comment
addressed.
10. [C-902] There are two SWM 10-3 channels labeled. Please clarify. Rev. 1: Comment addressed.
11. [C-902] Please clarify drainage areas (Example Drainage area 413 is going to Pond 4?). Rev. l:
Comment addressed.
12. Please provide all SWM stage/storage curves/routings, etc. These may be provided in a
calculations booklet. Rev. 1: Comment addressed.
13. Please explain the purpose of the WPO condition vs. the ultimate condition. If WPO & ultimate
are different phases, provide details & calculations for each phase. Rev. 1: Comment addressed.
14. Please provide the emergency spillway designs for the ponds. Rev. 1: Please clarify. The sediment
basin calculations say without spillway and have N/A, however spillways are shown on the plans
for all of the ponds. Also, on Sheet C-627, the detail for pond 4 says with spillway, but the
calculations say N/A. Rev. 2: The overall sheet C-603 still shows the spillways. Please remove.
Rev. 3: Comment addressed.
15. [C-903] There is a note on the left side of the page that differs from the note on Sheet C-907
Engineering Review Comments
Page 3 of 6
regarding Pond 4. Please clarify. Rev 1: Comment still valid. Sheet C-906 still has a note that says
this pond 4 is for quantity only, not quality. However, Sheet C-900 says all ponds are used for
quantity and quality. Please remove this note on Sheet C-906. Rev. 2: This note is still shown on
sheet C-907. Please remove. Rev. 3: Comment addressed.
16. Please check all drainage areas. (Example: DA 4B treated appears to be incorrect). Rev. 1:
Comment addressed.
17. [C-907] This VRRM spreadsheet needs to be correlated with the overall SWM master plan for the
Brookhill development. Please revise. Also, provide the tracking spreadsheet from the SWM
master plan to update with this plan. Rev. 1: Comment addressed.
18. [C-907] The VRRM spreadsheet references facilities that were not shown on this plan
(bioretention, infiltration, etc.). Please show all proposed facilities and their designs on this plan.
Please also show their maintenance schedules (based on Section 9 of the DEQ specification for
each type of facility). Rev. 1: Please clarify the drainage areas used in the VRRM spreadsheet
(what do A, B, C and D correspond to?). Rev. 2: Drainage areas were clarified for B, D, C, and E,
however drainage area A was missing. It appears that the summary was repeated, instead of
including drainage area A. Rev. 3: Comment addressed.
19. Please show a SWM facility easement around each proposed facility. Rev. 1: Comment addressed.
21. A SWM deed and easement plat will need to be recorded before plan approval. Rev. 1: The
County Engineer has decided that this plat can be completed with each final WPO submission that
show the ultimate development conditions on site. Rev. 2 Comment addressed.
22. Rev. 1: [C-903] Culvert 2 calculations show a 15" pipe, but the plans call for an 18" pipe. Please
clarify. The length is also different (52' vs 57'). Rev. 2: Comment addressed.
23. Rev l: [C-900] Please show the drainage area to POI 5 to illustrate how it is meeting the 1% rule.
Rev. 2: Comment addressed.
24. Rev. 1: [C-902] Please clarify the drainage areas to culvert 1, 2, and 3. Rev. 2: Comment
addressed.
25. Rev. 1: [C-903, C-904] There are calculations for culverts 4, 10 and 11. Please clarify their
locations and drainage areas on the plans. Rev. 2: Comment addressed.
26. Rev. 1: Per page 10 of DEQ Spec No. 1.4 for wet ponds, side slopes should be 4:1 or 5:1. The
proposed 2:1 is not acceptable for the final condition of the pond. Rev. 2: Comment addressed.
27. Rev. 1: Per page 11 of DEQ Spec No. 14 for wet ponds, provide a landscape planting plan. Rev. 2:
Comment addressed.
28. Rev. 1: Per page 16 of DEQ Spec No. 14 for wet ponds, the bottom elevation of the wet pond
should be lower than the elevation of the temporary sediment basin. Rev. 2: Comment addressed.
29. Rev. 1: As requested in previous comment 18, please show the maintenance schedules for the
proposed SWM facilities. (section 9 of the DEQ spec.). Rev. 2: Comment addressed.
30. Rev 1: Per 9VAC25-870-66, all concentrated flows must be discharged into a conveyance system.
Even if the Energy Balance is used, stormwater must still be released into a channel. Please
ensure you are meeting this regulation. (For example, pond 4 outfall does not appear to go to a
channel). Rev. 2: Ensure that the proposed channel extends to the existing channel. (example,
Pond 1.0 appears to stop short). Rev. 3: Comment addressed.
31. Rev 1: Provide profiles and calculations for all drainage pipes. (example, the pipes leaving pond
I1). Rev. 2: Comment addressed.
Engineering Review Comments
Page 4 of 6
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. Show all existing easements (access, drainage, sight, sanitary easements, etc.) with deed book
references, locations and dimensions. Rev. 1: Comment not addressed. Ensure DB & PG is shown
for all easements. Rev. 2: Comment addressed.
2. Show temporary seeding, permanent seeding and dust control symbols on all E&S sheets. Rev. l:
Comment addressed.
3. Site specific details for Temporary Slope Drain (TSD) sizing need to be provided. Rev. 1:
Comment addressed. However, please add the TSD to your E&S legend and ensure TSD is labeled
at all locations. Rev. 2: Comment addressed.
4. Naming of Sediment Basins needs to be consistent, Phase IV sequence does not match plans. Rev.
1: Comment addressed.
5. Sheet C-604, adjust Clearing Limits to capture Diversion Dike. Rev. l: Comment addressed.
6. Combine Phase 1 and Phase 2 Erosion and Sediment Control Plan into one phase to simplify
overall phasing. Rev. 1: Comment addressed.
7. Confirm that Culvert & Culvert Inlet Protection is not needed at the Construction Entrance located
at the Borrow Area. Rev. 1: Comment addressed.
8. Details for the proposed Turf Ditch are needed. Rev. 1: Comment addressed.
9. Paved Construction Entrances (not stone) are needed for projects in the development areas over 10
acres. (See Engineering Design Standards Manual section 3F for detail). Ensure that all references
to a stone CE are removed from the plan. Rev. 1: Comment addressed.
10. Adjust grading on plan to allow Silt Fence to be installed 5 to 7 feet (minimum) beyond base of a
slope per VESCH requirement. Rev. 1: Provide note on plans regarding the need to use super silt
fence a minimum of 4ft below the base of any fill slopes. Rev. 2: Comment addressed.
11. Provide copies of additional permits that have been obtained (ACOS, DEQ, etc). Rev. 1:
Comment still valid. Rev. 2. Plan cannot be approved until all applicable permits are
obtained and provided to the County. Rev. 3: Comment addressed. Provide copy of
CLOMR letter once received.
12. Provide right-of-way diversions at construction entrances. Rev. l: Comment addressed.
13. Provide outlet protection designs for all outlet protection locations. Rev. 1: Outlet protection sizing
was provided for ponds and diversion dikes, but not for pipes. Example, sheet C-623, OP is
specified, but design is not shown. Rev. 2: Comment addressed.
14. Please explain the 25' clearing buffer. Rev. 1: Provide note on the plans explaining this buffer is to
install initial perimeter controls. Rev. 2: Comment addressed.
15. Provide drainage area maps for the sediment basins. Rev. 1: Comment addressed.
16. Ensure that the entire site has perimeter controls. (Example Sheet C-613 — provide perimeter
control silt fence). Rev. 1: Comment addressed.
17. The Phase IV Sequence of Construction on sheets C-611 to C-615 does not appear to match the
plans. Please revise. Rev. l: Comment addressed.
18. Please clearly outline the sequence of construction on sheet C-103. Include the names of basins
and ponds to be installed/converted, etc. Also, why is Phase II proposing the removal of all
facilities and then a new pre -con for Phase III? Rev. 1: Comment mostly addressed. Sheet C-103
still mentions basin 4A in the Phase III sequence. Rev. 2: Comment addressed.
19. The basin ID on sheet C-620 appears to be incorrect. It says 11A, but it should be 10. Rev. 1:
Comment addressed.
20. Crownvetch is allowed per VESCH, but recommend using a noninvasive species (see page 3 of
Engineering Review Comments
Page 5 of 6
this :
Rev l: Crovnvetchimstill referenced onafew sheets. (C-610ioone). Rev. 2: Comment
addressed.
21. Rev l: [C- 1021 The note inthe detail for the driveway says itwill beused bnPhase O,please
correct 10Phase [ The note also states that ufinal design will ho provided once CQkaare received.
This ianot necessary. Rev. 2: Comment addressed.
22. Rev. |: \7[)OTentrance permit iorequired for all entrances off of\/[)0Troads. Rev. 2: \7DOT
permit iunecessary for construction entrances. Rev, 3: Comment addressed.
23.Rev. |:[C -6O2] Provide [)[) label. Rev. 2:Comment addressed.
24. Rev. 1: [C-602] Ensure existing and proposed contours are labeled. Rev. 2: Comment addressed.
25. Rev. |: [C-603] Narrative note #4 says construct road, however this was done in Phase |. /\len.
note #9should say phase {Iiucomplete, not phase |. Rev. 2: Comment addressed.
26. Rev. 1: Specify stone to be placed at the staging areas. Rev. 2: Comment addressed.
27, Rev. |: [[-6|5,C-623] There ivasymbol that does not appear inthe legend. Ulooks like u
dituh/avvu|*.Please clarify. Provide calculations ifitiauchannel for water. Rev. 2: Coounmo1
addressed.
28. Rev. |: Add temporary slope drain toyour legend where applicable. Rev. 2: Comment addressed.
29. Rev. 1: [C-620] Show inlet and outlet protection for the driveway culvert. Rev. 2: Comment
addressed.
30. Rev. 1: [C-623] There is another symbol not provided in the legend which leads to rip -rap. Please
clarify. lfiiimuchannel, provide the calculations. Rev. 2: Comment addressed.
31. Rev. 1: Ponds 10 and I I calculations show baffles are required, however they are not shown on
the plan view. Rev. 2: Comment addressed.
3%,Rev. \: Please differentiate clean water diversions vs. regular diversion dikes. (CWD vs DD).
Buaoze CVVD is shown in the legend and details. Rev. 2: Comment addressed.
33,Rev. \:[C-605] There appears 1ohcaohaunoKnp/u|etodirect water {opond \\. Please show
oo|oo|o1ioum to ensure i|can handle the flow and there is no erosive velocity. Rev. 2: Comment
addressed.
34, Rev. ]: Ensure all silt fence adjacent Comtorrnpipes imez|uodcdupandorouoddhepipe outfall.
Rev. 2:Comment addressed.
35,Rev I: [C -6226L623] There are channels shown (od -rap.Tbemembou|dbeaedicneo|trapa.
Specify the areas to them, the slopes of the channels, etc. Rev. 2: Comment addressed.
36. Rev. 1: Consider adding sheet numbers to your sheet keys. It would really help with navigating the
plans. Rev. 2: Comment addressed.
37. Rev. 2: Add a note to the plan sheets for basins with baffles that states that the contractor and
inspector will meet and agree on the best location for the baffles in the basins based on site
conditions. Rev. 3:Comment addressed.
30. Rev. 2: The legend and notes on Sheet C-616 are not legible. Rev. 3: Comment addressed.
39, Rev. 2: [C-623] Recommend straightening Swale 5. The curves promote erosion. QKcv, 3:
Comment addressed.
40, Rev. 2:Ensure BWDimprovided a(all travebwaycrossings. (examples: sheets C-605,C-62l,C-
h|6and [-620.Z)[)incrossing the gravel access road) Rev. 3: Comment addressed.
48,Rev 2:|C-62OlI)I]iagoing straight through the staging area. Please revise. Rev. 3: Comment
addressed.
42, Rev 2: [C-609 and C-61 I ] Provide inlet protection for the existing culverts. Rev. 3: Comment
addressed.
43. Bev. 2: [C-622] There ia0P shown with oochannel? Please remove. Rev. 3: Comment
addressed.
Engineering Review Comments
Page 6 of 6
44. Rev. 2: [C-615] Swale 1 should not start parallel with the contours. Consider starting about 50'
from the current proposed start. Rev. 3: Comment addressed.
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.
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=cdengwpo
Phone (434) 296-5832
Project title:
Project file number:
Plan preparer:
Owner or rep.:
Plan received date:
Rev. 1 received date:
Rev. 2 received date:
Date of comments:
Rev. 1 comments:
Rev. 2 comments:
Reviewers:
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 Section 1 Block 4A and Block 8A
WP0201700037
Bohler Engineering — Ryan Yauger [ryauger@bohlereng.com]
Riverbend Development — Alan Taylor [alan@riverbenddev.eom]
19 April 2017
01 Aug 2017
28 Sept 2017
02 June 2017
08 Sept 2017
27 Oct 2017
Geoff Elsie
Emily Cox
Frank Pohl
County Code section 17-410 and Virginia Code §621-44.15:34 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.
SWPPP was not provided with this submission. Provide two copies of a SWPPP. Rev. 1: SWPPP
provided. Please provide two copies of the SWPPP at plan approval. Rev. 2: Comment
addressed. Ensure the plan sheets are updated with any revisions before approval.
Ensure that the SWPPP contains a signed registration statement and a signed certification (section
1 and 9 of this template) -
http://www.albemarle.org%upload/images/forms center/departments/Community Development/for
ms/Engineering �and �WPO ®Forms/Stormwater�Pollution ®Prevention �Plan � SWPPP template.pdf
Rev. 1: Comment not addressed. Rev. 2: Comment addressed.
B. Pollution Prevention Plan (PPP)
The PPP content requirements can be found in County Code section 17-404.
1. PPP was not provided with this submission. Provide two copies of a PPP and ensure it contains
everything as outlined in County Code section 17-404. Rev. 1: Comment addressed. If any
Engineering Review Comments
Page 2 of 6
changes are made with the next submission, ensure it is updated. Rev. 2: Comment addressed.
Ensure the plan sheets are updated with any revisions 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.
L [General] Consider re -naming plan to be Section 1, Block 4 and Block 8, PHASE A(or however
you are intending to break down the sections/blocks/phase submissions). Rev. 1: Comment
addressed.
2. Please provide the date & source of the topographic information. Rev. 1: Comment addressed.
3. [Cover Sheet] Remove WPO Plan title and re -name it VSMP Plan. Also, include
WPO201700037 in the title. Rev. l: Comment addressed.
4. [Cover Sheet] Remove the signature block. Rev. 1: Comment addressed.
5. [Cover Sheet] Include the approved ZMA (#201500007) in the references block. Rev. 1:
Comment addressed.
6. [General] Ensure all items from the approved ZMA and Stormwater Master Plan are accurately
shown throughout the entire plan - floodplain, steep slopes, greenway, open space, buffers,
cemeteries, etc (There is no RPA buffer in Albemarle County). Note that no additional disturbance
will be allowed in any buffers, etc. than what is shown on the approved ZMA. Rev. 1: These items
are still insufficiently shown. They need to be shown on all sheets to ensure no grading is incurring
in buffers, etc. There are also buffers along Polo Grounds Road and Route 29. Ensure the only
grading/disturbance that occurs is what is allowed by the Code of Development and approved
ZMA. Rev. 2: Comment addressed.
7. [C-600(and throughout plan] The proposed driveway is not shown on the ZMA or overlot grading
plan. Please remove or provide note if it is temporary/will be removed. Rev. 1: Comment
addressed.
8. [Phase IV E&S] Please clarify the sediment basin and pond nomenclature. (Example.... sheet C-
613 says sediment basin 10, however it is actually POND 10, as presented in the calculations and
drainage area calculations). Rev 1: Comment addressed.
9. [C-621] Provide drainage divide map for the channels and culvert calculations. Rev. 1: Comment
addressed.
10. [C-902] There are two SWM 10-3 channels labeled. Please clarify. Rev. 1: Comment addressed.
11. [C-902] Please clarify drainage areas (Example Drainage area 413 is going to Pond 4?). Rev. 1:
Comment addressed.
12. Please provide all SWM stage/storage curves/routings, etc. These may be provided in a
calculations booklet. Rev. l: Comment addressed.
13. Please explain the purpose of the WPO condition vs. the ultimate condition. If WPO & ultimate
are different phases, provide details & calculations for each phase. Rev. 1: Comment addressed.
14. Please provide the emergency spillway designs for the ponds. Rev. 1: Please clarify. The sediment
basin calculations say without spillway and have N/A, however spillways are shown on the plans
for all of the ponds. Also, on Sheet C-627, the detail for pond 4 says with spillway, but the
calculations say N/A. Rev. 2: The overall sheet C-603 still shows the spillways. Please
remove.
15. [C-903] There is a note on the left side of the page that differs from the note on Sheet C-907
regarding Pond 4. Please clarify. Rev 1: Comment still valid. Sheet C-906 still has a note that says
this pond 4 is for quantity only, not quality. However, Sheet C-900 says all ponds are used for
quantity and quality. Please remove this note on Sheet C-906. Rev. 2: This note is still shown on
Engineering Review Comments
Page 3 of 6
sheet C-907. Please remove.
16. Please check all drainage areas. (Example: DA 4B treated appears to be incorrect). Rev. 1:
Comment addressed.
17. [C-907] This VRRM spreadsheet needs to be correlated with the overall SWM master plan for the
Brookhill development. Please revise. Also, provide the tracking spreadsheet from the SWM
master plan to update with this plan. Rev. 1: Comment addressed.
18. [C-907] The VRRM spreadsheet references facilities that were not shown on this plan
(bioretention, infiltration, etc.). Please show all proposed facilities and their designs on this plan.
Please also show their maintenance schedules (based on Section 9 of the DEQ specification for
each type of facility). Rev. 1: Please clarify the drainage areas used in the VRRM spreadsheet
(what do A, B, C and D correspond to?). Rev. 2: Drainage areas were clarified for B, D, C,
and E, however drainage area A was missing. It appears that the summary was repeated,
instead of including drainage area A.
19. Please show a SWM facility easement around each proposed facility. Rev. l: Comment
addressed.
20. Stormwater Management Facilities Maintenance agreements will need to be completed and
recorded. The County's Management Analyst (Ana Kilmer) 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. Rev. 1: Comment still valid. Rev. 2: Comment not
addressed. This must be recorded before plan approval.
21. A SWM deed and easement plat will need to be recorded before plan approval. Rev. 1: The
County Engineer has decided that this plat can be completed with each final WPO submission that
show the ultimate development conditions on site. Rev. 2 Comment addressed.
22. Rev. 1: [C-903] Culvert 2 calculations show a 15" pipe, but the plans call for an 18" pipe. Please
clarify. The length is also different (52' vs 57'). Rev. 2: Comment addressed.
23. Rev l: [C-900] Please show the drainage area to POI 5 to illustrate how it is meeting the 1% rule.
Rev. 2: Rev. 2: Comment addressed.
24. Rev. 1: [C-902] Please clarify the drainage areas to culvert 1, 2, and 3. Rev. 2: Comment
addressed.
25. Rev. 1: [C-903, C-904] There are calculations for culverts 4, 10 and 11. Please clarify their
locations and drainage areas on the plans. Rev. 2: Comment addressed.
26. Rev. 1: Per page 10 of DEQ Spec No. 1.4 for wet ponds, side slopes should be 4:1 or 5:1. The
proposed 2:1 is not acceptable for the final condition of the pond. Rev. 2: Comment addressed.
27. Rev. 1: Per page 11 of DEQ Spec No. 14 for wet ponds, provide a landscape planting plan. Rev.
2: Comment addressed.
28. Rev. 1: Per page 16 of DEQ Spec No. 14 for wet ponds, the bottom elevation of the wet pond
should be lower than the elevation of the temporary sediment basin. Rev. 2: Comment
addressed.
29. Rev. 1: As requested in previous comment 18, please show the maintenance schedules for the
proposed SWM facilities. (section 9 of the DEQ spec.). Rev. 2: Comment addressed.
30. Rev 1: Per 9VAC25-870-66, all concentrated flows must be discharged into a conveyance system.
Even if the Energy Balance is used, stormwater must still be released into a channel. Please
ensure you are meeting this regulation. (For example, pond 4 outfall does not appear to go to a
channel). Rev. 2: Ensure that the proposed channel extends to the existing channel.
(example, Pond 10 appears to stop short).
31. Rev 1: Provide profiles and calculations for all drainage pipes. (example, the pipes leaving pond
11). Rev. 2: Comment addressed.
Engineering Review Comments
Page 4 of 6
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.
Show all existing easements (access, drainage, sight, sanitary easements, etc.) with deed book
references, locations and dimensions. Rev. 1: Comment not addressed. Ensure DB & PG is shown
for all easements. Rev. 2: Comment addressed.
2. Show temporary seeding, permanent seeding and dust control symbols on all E&S sheets. Rev. 1:
Comment addressed.
3. Site specific details for Temporary Slope Drain (TSD) sizing need to be provided. Rev. 1:
Comment addressed. However, please add the TSD to your E&S legend and ensure TSD is labeled
at all locations. Rev. 2: Comment addressed.
4. Naming of Sediment Basins needs to be consistent, Phase IV sequence does not match plans. Rev.
1: Comment addressed.
5. Sheet C-604, adjust Clearing Limits to capture Diversion Dike. Rev. 1: Comment addressed.
6. Combine Phase 1 and Phase 2 Erosion and Sediment Control Plan into one phase to simplify
overall phasing. Rev. 1: Comment addressed.
7. Confirm that Culvert & Culvert Inlet Protection is not needed at the Construction Entrance located
at the Borrow Area. Rev. 1: Comment addressed.
8. Details for the proposed Turf Ditch are needed. Rev. 1: Comment addressed.
9. Paved Construction Entrances (not stone) are needed for projects in the development areas over 10
acres. (See Engineering Design Standards Manual section 3F for detail). Ensure that all references
to a stone CE are removed from the plan. Rev. 1: Comment addressed.
10. Adjust grading on plan to allow Silt Fence to be installed 5 to 7 feet (minimum) beyond base of a
slope per VESCH requirement. Rev. 1: Provide note on plans regarding the need to use super silt
fence a minimum of 411 below the base of any fill slopes. Rev. 2: Comment addressed.
11. Provide copies of additional permits that have been obtained (ACOS, DEQ, etc). Rev. 1:
Comment still valid. Rev. 2. Plan cannot be approved until all applicable permits are
obtained and provided to the County.
12. Provide right-of-way diversions at construction entrances. Rev. 1: Comment addressed.
13. Provide outlet protection designs for all outlet protection locations. Rev. 1: Outlet protection sizing
was provided for ponds and diversion dikes, but not for pipes. Example, sheet C-623, OP is
specified, but design is not shown. Rev. 2: Comment addressed.
14. Please explain the 25' clearing buffer. Rev. 1: Provide note on the plans explaining this buffer is to
install initial perimeter controls. Rev. 2: Comment addressed.
15. Provide drainage area maps for the sediment basins. Rev. 1: Comment addressed.
16. Ensure that the entire site has perimeter controls. (Example Sheet C-613 — provide perimeter
control silt fence). Rev. 1: Comment addressed.
17. The Phase IV Sequence of Construction on sheets C-611 to C-615 does not appear to match the
plans. Please revise. Rev. 1: Comment addressed.
18. Please clearly outline the sequence of construction on sheet C-103. Include the names of basins
and ponds to be installed/converted, etc. Also, why is Phase II proposing the removal of all
facilities and then a new pre -con for Phase III? Rev. 1: Comment mostly addressed. Sheet C-103
still mentions basin 4A in the Phase III sequence. Rev. 2: Comment addressed.
19. The basin ID on sheet C-620 appears to be incorrect. It says I IA, but it should be 10. Rev. 1:
Comment addressed.
20. Crownvetch is allowed per VESCH, but recommend using a noninvasive species (see page 3 of
this document):
bttp://www.deq.virginia.gov/Portals/O/DEQ/Water/Publications/NativelnvasiveFAQ.pdf
Engineering Review Comments
Page 5 of 6
Rev l: Crownvetch is still referenced on a few sheets. (C-610 is one). Rev. 2: Comment
addressed.
21. Rev 1: [C-1021 The note in the detail for the driveway says it will be used in Phase 11, please
correct to Phase I. The note also states that a final design will be provided once CBRs are received.
This is not necessary. Rev. 2: Comment addressed.
22. Rev. 1: VDOT entrance permit is required for all entrances off of VDOT roads. Rev. 2: VDOT
permit is necessary for construction entrances.
23. Rev. 1: [C-602] Provide DD label. Rev. 2: Comment addressed.
24. Rev. 1: [C-602] Ensure existing and proposed contours are labeled. Rev. 2: Comment addressed.
25. Rev. 1: [C-603] Narrative note #4 says construct road, however this was done in Phase 1. Also,
note #9 should say phase 11 is complete, not phase 1. Rev. 2: Comment addressed.
26. Rev. 1: Specify stone to be placed at the staging areas. Rev. 2: Comment addressed.
27. Rev. 1: [C-615, C-623] There is a symbol that does not appear in the legend. It looks like a
ditch/swale. Please clarify. Provide calculations if it is a channel for water. Rev. 2: Comment
addressed.
28. Rev. 1: Add temporary slope drain to your legend where applicable. Rev. 2: Comment
addressed.
29. Rev. 1: [C-620] Show inlet and outlet protection for the driveway culvert. Rev. 2: Comment
addressed.
30. Rev. 1: [C-623] There is another symbol not provided in the legend which leads to rip -rap. Please
clarify. If it is a channel, provide the calculations. Rev. 2: Comment addressed.
31. Rev. 1: Ponds 10 and 11 calculations show baffles are required, however they are not shown on
the plan view. Rev. 2: Comment addressed.
32. Rev. 1: Please differentiate clean water diversions vs. regular diversion dikes. (CWD vs DD).
Ensure CWD is shown in the legend and details. Rev. 2: Comment addressed.
33. Rev. 1: [C-605] There appears to be a channel/swale to direct water to pond 11. Please show
calculations to ensure it can handle the flow and there is no erosive velocity. Rev. 2: Comment
addressed.
34. Rev. 1: Ensure all silt fence adjacent to storm pipes is extended up and around the pipe outfall.
Rev. 2: Comment addressed.
35. Rev 1: [C-622 & 623] There are channels shown to rip -rap. These should be sediment traps.
Specify the areas to them, the slopes of the channels, etc. Rev. 2: Comment addressed.
36. Rev. 1: Consider adding sheet numbers to your sheet keys. It would really help with navigating the
plans. Rev. 2: Comment addressed.
37. Rev. 2: Add a note to the plan sheets for basins with baffles that states that the contractor
and inspector will meet and agree on the best location for the baffles in the basins based on
site conditions.
38. Rev. 2: The legend and notes on Sheet C-61.6 are not legible.
39. Rev. 2: [C-623] Recommend straightening Swale 5. The curves promote erosion.
40. Rev. 2: Ensure RWD is provided at all travelway crossings. (examples: sheets C-605, C-621,
C-616 and C-620, DD is crossing the gravel access road)
41. Rev 2: [C-620] DD is going straight through the staging area. Please revise.
42. Rev 2: [C-609 and C-6111 Provide inlet protection for the existing culverts.
43. Rev. 2: [C-622] There is OP shown with no channel? Please remove.
44. Rev. 2: [C-615] Swale 1 should not start parallel with the contours. Consider starting about
50' from the current proposed start.
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
Engineering Review Comments
Page 6 of 6
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.
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/deptfonns.asp?department=cdengwpo
SOF Aign.
COUNTY OF ALBEMARLE
ah Department of Community Development
401 McIntire Road, Room 227
Charlottesville, Virginia 22902-4596
Phone (434) 296-5832 Fax (434) 972-4126
Project title:
Project file number:
Plan preparer:
Owner or rep.:
Plan received date:
Plan received date:
Date of comments:
Rev. 1 comments:
Reviewers:
VSMP Permit plan review
Brookhill Section 1 Block 4A and Block 8A
WP0201700037
Bohler Engineering — Ryan Yauger [ryauger@bohlereng.com]
Riverbend Development — Alan Taylor [alan@riverbenddev.com]
19 April 2017
01 Aug 2017
02 June 2017
08 Sept 2017
Geoff Elsie
Emily Cox
Frank Pohl
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. SWPPP was not provided with this submission. Provide two copies of a SWPPP. Rev. 1: SWPPP
provided. Please provide two copies of the SWPPP at plan approval.
2. Ensure that the SWPPP contains a signed registration statement and a signed certification (section
1 and 9 of this template) -
htto://www.albemarle.ore/unload/imaizes/forms center/departments/Community Development/for
ms/EnLyineerina and WPO Forms/Stormwater Pollution Prevention Plan SWPPP template.pdf
Rev. 1: Comment not addressed.
B. Pollution Prevention Plan (PPP)
The PPP content requirements can be found in County Code section 17-404.
PPP was not provided with this submission. Provide two copies of a PPP and ensure it contains
everything as outlined in County Code section 17-404. Rev. 1: Comment addressed. If any
changes are made with the next submission, ensure it is updated.
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.
Engineering Review Comments
Page 2 of 6
1. [General] Consider re -naming plan to be Section 1, Block 4 and Block 8, PHASE A(or however
you are intending to break down the sections/blocks/phase submissions). Rev. 1: Comment
addressed.
2. Please provide the date & source of the topographic information. Rev. 1: Comment addressed.
3. [Cover Sheet] Remove WPO Plan title and re -name it VSMP Plan. Also, include
WPO201700037 in the title. Rev. 1: Comment addressed.
4. [Cover Sheet] Remove the signature block. Rev. 1: Comment addressed.
5. [Cover Sheet] Include the approved ZMA (#201500007) in the references block. Rev. 1:
Comment addressed.
6. [General] Ensure all items from the approved ZMA and Stormwater Master Plan are accurately
shown throughout the entire plan - floodplain, steep slopes, greenway, open space, buffers,
cemeteries, etc (There is no RPA buffer in Albemarle County). Note that no additional disturbance
will be allowed in any buffers, etc. than what is shown on the approved ZMA. Rev. 1: These
items are still insufficiently shown. They need to be shown on all sheets to ensure no grading
is incurring in buffers, etc. There are also buffers along Polo Grounds Road and Route 29.
Ensure the only grading/disturbance that occurs is what is allowed by the Code of
Development and approved ZMA.
7. [C-600(and throughout plan] The proposed driveway is not shown on the ZMA or overlot grading
plan. Please remove or provide note if it is temporary/will be removed. Rev. 1: Comment
addressed.
8. [Phase IV E&S] Please clarify the sediment basin and pond nomenclature. (Example.... sheet C-
613 says sediment basin 10, however it is actually POND 10, as presented in the calculations and
drainage area calculations). Rev 1: Comment addressed.
9. [C-621] Provide drainage divide map for the channels and culvert calculations. Rev. 1: Comment
addressed.
10. [C-902] There are two SWM 10-3 channels labeled. Please clarify. Rev. 1: Comment addressed.
11. [C-902] Please clarify drainage areas (Example Drainage area 4B is going to Pond 4?). Rev. 1:
Comment addressed.
12. Please provide all SWM stage/storage curves/routings, etc. These may be provided in a
calculations booklet. Rev. 1: Comment addressed.
13. Please explain the purpose of the WPO condition vs. the ultimate condition. If WPO & ultimate
are different phases, provide details & calculations for each phase. Rev. 1: Comment addressed.
14. Please provide the emergency spillway designs for the ponds. Rev. 1: Please clarify. The
sediment basin calculations say without spillway and have N/A, however spillways are
shown on the plans for all of the ponds. Also, on Sheet C-627, the detail for pond 4 says
with spillway, but the calculations say N/A.
15. [C-903] There is a note on the left side of the page that differs from the note on Sheet C-907
regarding Pond 4. Please clarify. Rev 1: Comment still valid. Sheet C-906 still has a note that
says this pond 4 is for quantity only, not quality. However, Sheet C-900 says all ponds are
used for quantity and quality. Please remove this note on Sheet C-906.
16. Please check all drainage areas. (Example: DA 4B treated appears to be incorrect). Rev. 1:
Comment addressed.
17. [C-907] This VRRM spreadsheet needs to be correlated with the overall SWM master plan for the
Brookhill development. Please revise. Also, provide the tracking spreadsheet from the SWM
master plan to update with this plan. Rev. 1: Comment addressed.
18. [C-907] The VRRM spreadsheet references facilities that were not shown on this plan
(bioretention, infiltration, etc.). Please show all proposed facilities and their designs on this plan.
Please also show their maintenance schedules (based on Section 9 of the DEQ specification for
Engineering Review Comments
Page 3 of 6
each type of facility). Rev. 1: Please clarify the drainage areas used in the VRRM spreadsheet
(what do A, B, C and D correspond to?).
19. Please show a SWM facility easement around each proposed facility. Rev. 1: Comment
addressed.
20. Stormwater Management Facilities Maintenance agreements will need to be completed and
recorded. The County's Management Analyst (Ana Kilmer) 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. Rev. 1: Comment still valid.
21. A SWM deed and easement plat will need to be recorded before plan approval. Rev. 1: The
County Engineer has decided that this plat can be completed with each final WPO
submission that show the ultimate development conditions on site.
22. Rev. 1: [C-903] Culvert 2 calculations show a 15" pipe, but the plans call for an 18" pipe.
Please clarify. The length is also different (52' vs 57').
23. Rev 1: [C-900] Please show the drainage area to POI 5 to illustrate how it is meeting the I%
rule.
24. Rev. 1: [C-902] Please clarify the drainage areas to culvert 1, 2, and 3.
25. Rev. 1: [C-903, C-9041 There are calculations for culverts 4,10 and 11. Please clarify their
locations and drainage areas on the plans.
26. Rev. 1: Per page 10 of DEQ Spec No. 14 for wet ponds, side slopes should be 4:1 or 5:1.
The proposed 2:1 is not acceptable for the final condition of the pond.
27. Rev. 1: Per page 11 of DEQ Spec No. 14 for wet ponds, provide a landscape planting plan.
28. Rev. 1: Per page 16 of DEQ Spec No. 14 for wet ponds, the bottom elevation of the wet pond
should be lower than the elevation of the temporary sediment basin.
29. Rev. 1: As requested in previous comment 18, please show the maintenance schedules for the
proposed SWM facilities. (section 9 of the DEQ spec.).
30. Rev 1: Per 9VAC25-870-66, all concentrated flows must be discharged into a conveyance
system. Even if the Energy Balance is used, stormwater must still be released into a channel.
Please ensure you are meeting this regulation. (For example, pond 4 outfall does not appear
to go to a channel).
31. Rev 1: Provide profiles and calculations for all drainage pipes. (example, the pipes leaving
pond 11).
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. Show all existing easements (access, drainage, sight, sanitary easements, etc.) with deed book
references, locations and dimensions. Rev. 1: Comment not addressed. Ensure DB & PG is
shown for all easements.
2. Show temporary seeding, permanent seeding and dust control symbols on all E&S sheets. Rev. 1:
Comment addressed.
3. Site specific details for Temporary Slope Drain (TSD) sizing need to be provided. Rev. 1:
Comment addressed. However, please add the TSD to your E&S legend and ensure TSD is
labeled at all locations.
4. Naming of Sediment Basins needs to be consistent, Phase IV sequence does not match plans. Rev.
1: Comment addressed.
5. Sheet C-604, adjust Clearing Limits to capture Diversion Dike. Rev. 1: Comment addressed.
6. Combine Phase 1 and Phase 2 Erosion and Sediment Control Plan into one phase to simplify
Engineering Review Comments
Page 4 of 6
overall phasing. Rev. 1: Comment addressed.
7. Confirm that Culvert & Culvert Inlet Protection is not needed at the Construction Entrance located
at the Borrow Area. Rev. 1: Comment addressed.
8. Details for the proposed Turf Ditch are needed. Rev. 1: Comment addressed.
9. Paved Construction Entrances (not stone) are needed for projects in the development areas over 10
acres. (See Engineering Design Standards Manual section 3F for detail). Ensure that all references
to a stone CE are removed from the plan. Rev. 1: Comment addressed.
10. Adjust grading on plan to allow Silt Fence to be installed 5 to 7 feet (minimum) beyond base of a
slope per VESCH requirement. Rev. 1: Provide note on plans regarding the need to use super
silt fence a minimum of 4ft below the base of any fill slopes.
11. Provide copies of additional permits that have been obtained (ACOE, DEQ, etc). Rev. 1:
Comment still valid.
12. Provide right-of-way diversions at construction entrances. Rev. 1: Comment addressed.
13. Provide outlet protection designs for all outlet protection locations. Rev. 1: Outlet protection
sizing was provided for ponds and diversion dikes, but not for pipes. Example, sheet C-623,
OP is specified, but design is not shown.
14. Please explain the 25' clearing buffer. Rev. 1: Provide note on the plans explaining this buffer
is to install initial perimeter controls.
15. Provide drainage area maps for the sediment basins. Rev. 1: Comment addressed.
16. Ensure that the entire site has perimeter controls. (Example Sheet C-613 — provide perimeter
control silt fence). Rev. 1: Comment addressed.
17. The Phase IV Sequence of Construction on sheets C-611 to C-615 does not appear to match the
plans. Please revise. Rev. 1: Comment addressed.
18. Please clearly outline the sequence of construction on sheet C-103. Include the names of basins
and ponds to be installed/converted, etc. Also, why is Phase II proposing the removal of all
facilities and then a new pre -con for Phase III? Rev. 1: Comment mostly addressed. Sheet C-
103 still mentions basin 4A in the Phase III sequence.
19. The basin ID on sheet C-620 appears to be incorrect. It says 11 A, but it should be 10. Rev. 1:
Comment addressed.
20. Crownvetch is allowed per VESCH, but recommend using a noninvasive species (see page 3 of
this document):
http://www.deg.vir ig nia.gov/Portals/0/DEQ/Water/Publications/NativelnvasiveFAO.pdf
Rev 1: Crownvetch is still referenced on a few sheets. (C-610 is one).
21. Rev 1: [C-102] The note in the detail for the driveway says it will be used in Phase 11, please
correct to Phase 1. The note also states that a final design will be provided once CBRs are
received. This is not necessary.
22. Rev. 1: VDOT entrance permit is required for all entrances off of VDOT roads.
23. Rev. 1: [C-602] Provide DD label.
24. Rev. 1: [C-602] Ensure existing and proposed contours are labeled.
25. Rev. 1: [C-603] Narrative note #4 says construct road, however this was done in Phase 1.
Also, note #9 should say phase 11 is complete, not phase 1.
26. Rev. 1: Specify stone to be placed at the staging areas.
27. Rev. 1: [C-615, C-6231 There is a symbol that does not appear in the legend. It looks like a
ditch/swale. Please clarify. Provide calculations if it is a channel for water.
28. Rev. 1: Add temporary slope drain to your legend where applicable.
29. Rev. 1: [C-620] Show inlet and outlet protection for the driveway culvert.
30. Rev. 1: [C-623] There is another symbol not provided in the legend which leads to rip -rap.
Please clarify. If it is a channel, provide the calculations.
31. Rev. 1: Ponds 10 and 11 calculations show baffles are required, however they are not shown
Engineering Review Comments
Page 5 of 6
on the plan view.
32. Rev. 1: Please differentiate clean water diversions vs. regular diversion dikes. (CWD vs DD).
Ensure CWD is shown in the legend and details.
33. Rev. 1: [C-605] There appears to be a channel/swale to direct water to pond 11. Please show
calculations to ensure it can handle the flow and there is no erosive velocity.
34. Rev. 1: Ensure all silt fence adjacent to storm pipes is extended up and around the pipe
outfall.
35. Rev 1: [C-622 & 623] There are channels shown to rip -rap. These should be sediment
traps. Specify the areas to them, the slopes of the channels, etc.
36. Rev. 1: Consider adding sheet numbers to your sheet keys. It would really help with
navigating the plans.
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.
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
Engineering Review Comments
Page 6 of 6
SOF Aign.
COUNTY OF ALBEMARLE
ah 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 Section 1 Block 4A and Block 8A
Project file number: WP0201700037
Plan preparer: Bohler Engineering — Ryan Yauger [ryauger@bohlereng.com]
Owner or rep.: Riverbend Development — Alan Taylor [alan@riverbenddev.com]
Plan received date: 19 April 2017
Date of comments: 02 June 2017
Reviewers: Geoff Elsie
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. SWPPP was not provided with this submission. Provide two copies of a SWPPP.
2. Ensure that the SWPPP contains a signed registration statement and a signed certification (section
1 and 9 of this template) -
http://www.albemarle.ore/ul)load/imaiies/forms center/departments/Community Development/for
ms/En in�g and _WPO _Forms/Stormwater Pollution_ Prevention Plan SWPPP template.pdf
B. Pollution Prevention Plan (PPP)
The PPP content requirements can be found in County Code section 17-404.
1. PPP was not provided with this submission. Provide two copies of a PPP and ensure it contains
everything as outlined in County Code section 17-404.
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] Consider re -naming plan to be Section 1, Block 4 and Block 8, PHASE A(or however
you are intending to break down the sections/blocks/phase submissions).
2. Please provide the date & source of the topographic information.
3. [Cover Sheet] Remove WPO Plan title and re -name it VSMP Plan. Also, include
WP0201700037 in the title.
4. [Cover Sheet] Remove the signature block.
Engineering Review Comments
Page 2 of 4
5. [Cover Sheet] Include the approved ZMA (#201500007) in the references block.
6. [General] Ensure all items from the approved ZMA and Stormwater Master Plan are accurately
shown throughout the entire plan - floodplain, steep slopes, greenway, open space, buffers,
cemeteries, etc (There is no RPA buffer in Albemarle County). Note that no additional disturbance
will be allowed in any buffers, etc. than what is shown on the approved ZMA.
7. [C-600(and throughout plan] The proposed driveway is not shown on the ZMA or overlot grading
plan. Please remove or provide note if it is temporary/will be removed.
8. [Phase IV E&S] Please clarify the sediment basin and pond nomenclature. (Example.... sheet C-
613 says sediment basin 10, however it is actually POND 10, as presented in the calculations and
drainage area calculations).
9. [C-621 ] Provide drainage divide map for the channels and culvert calculations.
10. [C-902] There are two SWM 10-3 channels labeled. Please clarify.
11. [C-902] Please clarify drainage areas (Example Drainage area 4B is going to Pond 4?).
12. Please provide all SWM stage/storage curves/routings, etc. These may be provided in a
calculations booklet.
13. Please explain the purpose of the WPO condition vs. the ultimate condition. If WPO & ultimate
are different phases, provide details & calculations for each phase.
14. Please provide the emergency spillway designs for the ponds.
15. [C-903] There is a note on the left side of the page that differs from the note on Sheet C-907
regarding Pond 4. Please clarify.
16. Please check all drainage areas. (Example: DA 4B treated appears to be incorrect).
17. [C-907] This VRRM spreadsheet needs to be correlated with the overall SWM master plan for the
Brookhill development. Please revise. Also, provide the tracking spreadsheet from the SWM
master plan to update with this plan.
18. [C-907] The VRRM spreadsheet references facilities that were not shown on this plan
(bioretention, infiltration, etc.). Please show all proposed facilities and their designs on this plan.
Please also show their maintenance schedules (based on Section 9 of the DEQ specification for
each type of facility).
19. Please show a SWM facility easement around each proposed facility.
20. Stormwater Management Facilities Maintenance agreements will need to be completed and
recorded. The County's Management Analyst (Ana Kilmer) 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.
21. A SWM deed and easement plat will need to be recorded before plan approval.
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. Show all existing easements (access, drainage, sight, sanitary easements, etc.) with deed book
references, locations and dimensions.
2. Show temporary seeding, permanent seeding and dust control symbols on all E&S sheets.
3. Site specific details for Temporary Slope Drain (TSD) sizing need to be provided.
4. Naming of Sediment Basins needs to be consistent, Phase IV sequence does not match plans.
5. Sheet C-604, adjust Clearing Limits to capture Diversion Dike.
6. Combine Phase 1 and Phase 2 Erosion and Sediment Control Plan into one phase to simplify
overall phasing.
7. Confirm that Culvert & Culvert Inlet Protection is not needed at the Construction Entrance located
at the Borrow Area.
Engineering Review Comments
Page 3 of 4
8. Details for the proposed Turf Ditch are needed.
9. Paved Construction Entrances (not stone) are needed for projects in the development areas over 10
acres. (See Engineering Design Standards Manual section 317 for detail). Ensure that all references
to a stone CE are removed from the plan.
10. Adjust grading on plan to allow Silt Fence to be installed 5 to 7 feet (minimum) beyond base of a
slope per VESCH requirement.
11. Provide copies of additional permits that have been obtained (ALOE, DEQ, etc).
12. Provide right-of-way diversions at construction entrances.
13. Provide outlet protection designs for all outlet protection locations.
14. Please explain the 25' clearing buffer.
15. Provide drainage area maps for the sediment basins.
16. Ensure that the entire site has perimeter controls. (Example Sheet C-613 — provide perimeter
control silt fence).
17. The Phase IV Sequence of Construction on sheets C-611 to C-615 does not appear to match the
plans. Please revise.
18. Please clearly outline the sequence of construction on sheet C-103. Include the names of basins
and ponds to be installed/converted, etc. Also, why is Phase II proposing the removal of all
facilities and then a new pre -con for Phase III?
19. The basin ID on sheet C-620 appears to be incorrect. It says I IA, but it should be 10.
20. Crownvetch is allowed per VESCH, but recommend using a noninvasive species (see page 3 of
this document):
http://www.deq.vir i� nia.gov/Portals/0/DEQ/Water/Publications/NativelnvasiveFAQ.pdf
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.
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
Engineering Review Comments
Page 4 of 4
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;
hqp://www.albemarle.org/deptforyns.asp?department--cdengno