HomeMy WebLinkAboutWPO202000026 Correspondence 2020-06-03W1 ROUDABUSH, GALE & ASSOCIATES, INC.,,
ENGINEERS, SURVEYORS AND LAND PLANNERS
Date: Monday, June 1, 2020
To: John Anderson
From: Roudabush. Gale & Associates, Logan O'Day, EIT
RE: WPO-2020-00026— VESCP Comment Response Letter
Dear Mr. Anderson,
We have received your comments dated 05/18/2020 and have provided the following
responses
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. Provide SWPPP, given potential for erosion. Use Albemarle County SWPPP template.
RESPONSE: A SWPPP containing all the required information has been provided with this submittal.
B. Pollution Prevention Plan (PPP) —See above.
The PPP content requirements can be found in County Code section 17-404.
1. Please ensure PPP Exhibit identifies:
i. Rain gauge
ii. Construction entrance that drains to a trapping measure
RESPONSE: A PPP with all the required information, including the two notes provided above, has been
provided with this submittal.
C. Stormwater Management Plan (SWMP) — NA: VESCP only
RESPONSE: Comment noted
D. Erosion and Sediment Control Plan (ESCP)
Sheet 1
2. Revise sheet index to list sheet 4 as Phase II.
RESPONSE: Sheet 4 is now listed as ESC Phase II in sheet index
3. Revise plan title to include ref. to WP02020-00026.
914 Monticello Road, Charlottesville, VA 22902 172 South Pantops Drive, Charlottesville, VA 22901
Yancev Farm Pad 2 - VESCP Comment Response Letter Paae 2 of 3
RESPONSE: Plan title has been revised to include reference to WPO2020-00026
4. Include title sheet Note that the fill activity is subject to 18-5.1.28.
RESPONSE: Title sheet note added stating that fill activity is subject to
18-5.1.28.
5. Include Note that the land disturbance activity is subject to 17-300 (VESCP).
RESPONSE: Note added stating that land disturbance activity is subject to
17-300 (VESCP).
6. Include Note that Engineering has determined the activity is not subject to 17-302 (VSMP).
RESPONSE: Note has been added stating that Engineering has determined the
activity is not subject to 17-302 (VSMP).
7. An ESC Plan bond is required. Please submit bond estimate request form at earliest
convenience.
RESPONSE: An ESC Plan bond estimate request will be submitted upon tentative
plan approval.
Sheet 3
8. Silt fence bars entry to fill site; provide break in SF so haul trucks may enter.
RESPONSE: There is an entry point to the site provided and labeled on Sheets 3 and 4.
9. Similarly, provide break in silt fence at base of 18' sediment trap weir.
RESPONSE: Both sediment traps proposed in this submittal have a break in silt fence
at the outlet weir.
10. Provide site specific sediment trap profile. This is a substantial sediment trap. VESCH
typical/generic detail (sheet 6) is inadequate.
RESPONSE: The revised plan includes two sediment traps that have been simplified to
rectangular shapes. The standard detail provided in the notes and details sheets should now
be sufficient for construction of both sediment traps.
11. Where proposed grade ties to existing grade, there are new permanent channels. Evaluate
channel capacity/velocity against 2-, 10-yr events, respectively. Evaluate permanent
channels for erosion. Provide /specify stabilization matting /blanket, if needed, for
permanent channels created by proposed final grade. (blue arrows; images below)
RESPONSE: New permanent channels have been designed and evaluated for erosion
and capacity (see sheet 5).
12. Acquire temporary off -site construction easement, TMP 71-21, if needed.
RESPONSE: The site has been shifted to the north to avoid impact on TMP 71-21 so
that no construction easement should be necessary.
13. Revise design (as needed) to ensure no off -site erosive impact, or construction impact to
TMP 71-21, unless easement acquired to allow off -site construction. Runoff may not impact
adjacent parcels. Evaluate. Furnish calculations.
RESPONSE: The proposed grading has been shifted to the north and no longer
proposes any grading on areas that drain to TMP 71-21.
14. Provide channel cross-section/s for permanent channels (north / south) created by
proposed final grade, sheet 4.
RESPONSE: Cross -sections for permanent channels created by proposed final
914 Monticello Road, Charlottesville, VA 22902 172 South Pantops Drive, Charlottesville, VA 22901
Yancev Farm Pad 2 - VESCP Comment Response Letter Paae 3 of 3
grade are provided on sheet 5.
Sheet 4
15. Phase II diversion dike (DD) is impermissible as a permanent measure (it is a temporary ESC
measure). Provide, instead, a permanent grass -lined or stabilized channel capable of
withstanding 2-yr event runoff, capable of containing 10-yr event volume.
RESPONSE: A permanent stabilized channel have been provided to replace the
Phase II diversion dike.
16. Certain sections of SF in Phase II lie upslope of final graded -disturbed areas, and are not
strictly needed (comment applies to sheet 3, as well).
RESPONSE: Unnecessary sections of silt fence have been removed.
17. Revise legend to include WR. Do not recognize this symbol in the VESCH.
RESPONSE: Wash -rack has been added to legend.
18. Sheet 5: Few if any references to Stormwater Management on this sheet are necessary;
majority of references may be removed. Also, item 5, above.
RESPONSE: Any stormwater management references have been removed. MS-19
references remain.
19. Include code text at 18-5.1.28, Borrow, fill or waste areas (below), on the plans (except 18-
5.1.28.b.6., since an Erosion and Sediment Control plan is required).
Ensure text is readable. Link to text:
https://library.municode.com/va/aIbemarle_county/codes/code_of ordinances?nodeId=CO
ALCOVI CH18Z0 S 5SURE S5.ISURE 55.1.28BOFIWAAR
RESPONSE: Code text at 18-5.1.28 added to plans on Sheet 6
We thank you for taking the time to review these plans and trust the above adequately
addresses your comments. However, please let me know if you have any questions or require
additional information.
Sincerely,
Logan O'Day, EIT
914 Monticello Road, Charlottesville, VA 22902 172 South Pantops Drive, Charlottesville, VA 22901