HomeMy WebLinkAboutWPO201400010 Review Comments 2014-02-18Review Comments
Project Name: Cale Elem- Sch- Parking Lot Improvements Erosion and Sediment Control P�i -
Date Completed: lWednesday, April 23: 2014
Reviel,ver: I Frank Pohl
D e p a rtm e nt,D i vi 9 i o n..'agency: I -
Lyffice Faciffies Development
Reviews Comments:
Review Status: Approved F-I
Page: 11 County of Albemarle On: F12-17MU
Review Comments
Project Name: Cale Elem_ Sch_ Parking Lot Improvements Erosion and Sediment Control P�
Date Completed: J Friday„ April 11, 2014
Revievrer: Unassigned
Department "Divi9ion1.Agenc : No Division Selected
Reviews Comments:
show critical slopes on all sheets other- ise appro5,able
I
Review status: See Recommendations F-]
I
Rage: 11 Count of Albemarle !On: 121712014
f1l..:r
COUNTY OF ALBEMARLE
Office of Facilities Development
401 Mclntire Road,Room 228
Charlottesville,Virginia 22902-4596
Phone(434)872-4501 Fax(434)972-4091
To: Don Rissmeyer(AMT Engineering)
From: Frank V. Pohl, P.E.— Senior Project Manager(OFD)
Date: March 7, 2014
April 10,2014 (Rev. 1)
Subject: WPO 2014-00010—Cale Elementary School—Parking Lot Improvements
Minor Site Plan Amendment
The County of Albemarle Office of Facilities Development will recommend approval of the plan
referenced above once the following comments have been satisfactorily addressed. The
following comments are those that have been identified at this time. Additional comments or
conditions may be added or eliminated based on further review.
Stormwater Management Plan, E&S Control Plan and Calculations Comments:
1. The approved plan must be included in the plan set, with the specific areas of amendment
clearly outlined by bubbling or circling affected areas. The approved plan must not
otherwise be altered.
Rev. 1: Comment addressed.
2. [18-32.6.6, 14-302] Include an existing conditions plan in the plan set.
Rev. 1: Comment addressed.
3. [18-32.6.6, 14-302] Add description of datum reference to Note 9, General Notes.
Rev. 1: Comment addressed.
4. [18-32.6.6, 14-302] Indicate date of field survey in Note 10, General Notes.
Rev. 1: Comment addressed.
5. [32.5.2(a)] Show present use on abutting parcel to the south.
Rev. 1: Comment Addressed.
6. [32.5.2(a)] Show setback line for parcel to the south.
Rev. 1: Comment addressed.
7. [32.5.2(a)] Add overlay districts to the General Notes (Airport Impact Area and Entrance
Corridor).
Rev. 1: Comment addressed.
8. [32.5.2(a)] Include Comp Plan Use, Primary, Secondary and Land Use information in
General Notes.
Rev. 1: Comment addressed.
9. [32.5.3(d)] Show area of critical slopes as obtain from the County GIS website. If critical
slopes are impacted, a critical slope impact application is required.
Rev. 1: Comment not fully addressed. Please show critical slopes on all plan sheets,
including the Grading Plan and E&S Control Plan.
10. [32.5.2(f)] Indicate the watershed in Note 13, General Notes (Moore's Creek
watershed).
Rev. 1: Comment addressed.
11. [4.12.16.c.6] Parking spaces may be reduced to 16-ft deep where a 2-ft grassed overhang
is provided.
Rev. 1: A minimum 2-ft grass strip must be maintained from the face of curb to
landscaping where parking spaces are 16-ft deep. I suggest adjusting the trees to be
4-ft from the back of curb to allow vehicles to overhang the grass strip without
hitting the trees or the tree's temporary staking.
12. [Design Manual, Section 3.F] The adequate channel analysis provided does not address
all requirements of the Design Standards Manual.
Rev. 1: Comment addressed. However, page 5 of the report did not print correctly.
Please email page 5 and I will insert it into the report.
13. [Design Manual, Section 5] It appears that only detention (water quantity) is being
provided. Water quality shall also be addressed for all additional impervious areas. Please
provide pollutant loading and removal calculations. Facility may need to be revised to
provide treatment.
Rev. 1: Comment addressed.
14. [Design Manual, Section 8] Proposed slopes steeper than 3:1 shall have low maintenance
(not grass) ground cover specified on the plans. Proposed slopes shall not exceed 2:1.
Please indicate slopes within detention facilities on the plan.
Rev. 1: Comment addressed.
Now
15. Please indicate slopes within detention facilities on the plan.
Rev. 1: Comment addressed.
16.Provide a stage-storage table with water quality volume for each facility on the drawings.
Rev. 1: Comment addressed.
17. Provide a summary table indicating pre/post flow rates and velocities for the design storm
events for each facility on the drawings.
Rev. 1: Comment addressed.
18. Indicate Curve Number and Time of Concentration on drainage maps.
Rev. 1: Comment addressed.
19. E&S plan shall be a separate set of plans. Please submit separate plan sets for the site
plan application and the E&S Control application.
Rev. 1 Comment addressed.
20. Provide an existing conditions plan as part of the E&S Plan.
Rev. 1: Comment addressed.
21. Provide cross sections of SWM facilities, to include: dimensions, storm staging for 2- and
10-yr events, treatment stage elevation, width of embankment, side slopes, freeboard, etc.
Rev. 1: Comment addressed.
22. For embankments over 3-ft high,the top of back should have a minimum width of 8-ft.
This applies to the detention facilities.
Rev. 1: Comment addressed.
23. Inverts from the ponds appears to be below the elevation shown (i.e. pipe inv. elevation =
576.82 and contour=578.00). Show grading at headwalls/riprap.
Rev. 1: Comment addressed.
24. Confirm benchmark elevation (384.61?).
Rev. 1: Comment addressed.
25. Submit letter of approval from the County ARB once received.
Rev. 1: Comment addressed.
26. It appears that the sediment trap weir has an elevation of less than 580 when looking at
the contours. However, the sizing chart states the top elevation of weir is 581.
Now
Rev. 1: Comment addressed.
27. The overflow weir from the sediment trap should include outlet protection.
Rev. 1: Comment addressed.
28. Consider moving the locating of the silt trap to where future pond will be. Once the hole
is excavated it can be used for both the silt trap and the future SWM facility. This is just a
suggestion.
Rev. 1: Comment addressed.
29. Identify what"RR"means on the E&S Control Plan.
Rev. 1: Comment addressed.
30. Change direction of Diversion Dike on E&S Control Plan.
Rev. 1: Comment addressed.
31. Submit ARB approval letter showing the landscaping plan meets County requirements.
Rev. 1: Comment addressed.
• Frank Pohl
From: Frank Pohl
Sent: Friday, March 07, 2014 5:35 PM
To: Blake Abplanalp; 'drissmeyer @amtengineering.com'
Cc: Trevor Henry; Glenn Brooks
Subject: Cale Elementary Comments
Attachments: Cale_WPO_ReviewComments-03-07-14.pdf
Blake/Don,
Refer to attached comments. Let me know when you'd like to meet to review.
Thanks,
Frank
Frank V. Pohl, PE, LEED AP BD+C
Senior Project Manager
Office of Facilities Development
County of Albemarle
401 McIntire Road, Room 228
Charlottesville, Virginia 22902-4596
T (434) 872-4501 ext. 9-7914
F (434) 972-4091
C (434)466-7458
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COUNTY OF ALBEMARLE
Office of Facilities Development
401 McIntire Road,Room 228
Charlottesville,Virginia 22902-4596
Phone(434)872-4501 Fax(434)972-4091
March 7, 2014
To: Blake Abplanalp, Senior Project Manager(OFD)
From: Frank V. Pohl, P.E.—Senior Project Manager(OFD)
Date: March 7, 2014
Subject: WPO 2014-00010—Cale Elementary School —Parking Lot Improvements
Minor Site Plan Amendment
The County of Albemarle Office of Facilities Development will recommend approval of the plan
referenced above once the following comments have been satisfactorily addressed (The
following comments are those that have been identified at this time. Additional comments or
conditions may be added or eliminated based on further review.): [Each
Stormwater Management Plan, E&S Control Plan and Calculations Comments:
1. The approved plan must be included in the plan set, with the specific areas of amendment
clearly outlined by bubbling or circling affected areas. The approved plan must not
otherwise be altered.
2. [18-32.6.6, 14-302] Include an existing conditions plan in the plan set.
3. [18-32.6.6, 14-302] Add description of datum reference to Note 9, General Notes.
4. [18-32.6.6, 14-302] Indicate date of field survey in Note 10, General Notes.
5. [32.5.2(a)] Show present use on abutting parcel to the south.
6. [32.5.2(a)] Show setback line for parcel to the south.
7. [32.5.2(a)] Add overlay districts to the General Notes (Airport Impact Area and Entrance
Corridor).
8. [32.5.2(a)] Include Comp Plan Use, Primary, Secondary and Land Use information in
General Notes.
9. [32.5.3(d)] Show area of critical slopes as obtain from the County GIS website. If critical
slopes are impacted, a critical slope impact application is required.
10. [32.5.2(f)] Indicate the watershed in Note 13, General Notes (Moore's Creek
watershed).
11. [4.12.16.c.6] Parking spaces may be reduced to 16-ft deep where a 2-ft grassed overhang
is provided.
12. [Design Manual, Section 3.F] The adequate channel analysis provided does not address
all requirements of the Design Standards Manual.
13. [Design Manual, Section 5] It appears that only detention (water quantity)is being
provided. Water quality shall also be addressed for all additional impervious areas. Please
provide pollutant loading and removal calculations. Facility may need to be revised to
provide treatment.
14. [Design Manual, Section 8] Proposed slopes steeper than 3:1 shall have low maintenance
(not grass) ground cover specified on the plans. Proposed slopes shall not exceed 2:1.
Please indicate slopes within detention facilities on the plan.
15. Provide a stage-storage table with water quality volume for each facility on the drawings.
16. Provide a summary table indicating pre/post flow rates and velocities for the design storm
events for each facility on the drawings.
17. Indicate Curve Number and Time of Concentration on drainage maps.
18. E&S plan shall be a separate set of plans. Please submit separate plan sets for the site
plan application and the E&S Control application.
19. Provide an existing conditions plan as part of the E&S Plan.
20. Provide cross sections of SWM facilities, to include: dimensions, storm staging for 2- and
10-yr events, treatment stage elevation, width of embankment, side slopes, freeboard, etc.
21. For embankements over 3-ft high,the top of back should have a minimum width of 8-ft.
This applies to the detention facilities.
22. Inverts from the ponds appears to be below the elevation shown (i.e. pipe inv. elevation =
576.82 and contour= 578.00). Show grading at headwalls/riprap.
23. Confirm benchmark elevation (384.61?).
24. Submit letter of approval from the County ARB once received.
25. It appears that the sediment trap weir has an elevation of less than 580 when looking at
the contours. However, the sizing chart states the top elevation of weir is 581.
26. The overflow weir from the sediment trap should include outlet protection.
27. Consider moving the locating of the silt trap to where future pond will be. Once the hole
is excavated it can be used for both the silt trap and the future SWM facility. This is just a
suggestion.
28. Identify what"RR"means on the E&S Control Plan.
29. Change direction of Diversion Dike on E&S Control Plan.
30. Submit ARB approval letter showing the landscaping plan meets County requirements.
Suggestions:
1. Note that contractor shall remove and replace fencing as needed to install outlet piping.
2. Show asphalt curb on site plan, not just the E&S plan. Add an asphalt curb along the
south side of the basketball court to capture and direct stormwater to inlet.
3. Dimension the concrete pads in front of the sheds.
4. Identify striping requirements (i.e. painted white stripe between parking spaces).
5. Since the slope in the parking area is right at 5%, please add note that slopes shall not
exceed 5%.
Review Comments
Project Name: Cale Elerr<_ ch_ Parking Lot Improvements Erosion and Sediment Control P
Date Completed: ITuesday, February 18, 2014
Re' ie!,ver: Unassigned
Department +Divi9ion1.Agencr: Engineering
Reviews Comments:
This reuiew is being conducted by OFID
Review Status:
Pending
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Page: 1 Count of A.1bemarle 0 n: '12117,'2 114