HomeMy WebLinkAbout20190098 Saratoga Honda Vehicle Expansion Correspondance E
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March 28, 2019
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Mr. Timothy W. Wales, P.E.
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City Engineer
City of Saratoga Springs
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City Hall—474 Broadway
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Saratoga Springs, NY 1286603
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RE: City of Saratoga Springs—Site Plan Review—PB App. No. 20190098
Saratoga Honda Expansion
Dear Mr. Wales:
We have completed our review of the following documents submitted by The LA Group
Landscape Architecture & Engineering, P.C.: Stormwater Management Pollution Prevention
Plan, Site Plans, Complete Streets Checklist, Application for Site Plan Approval, and SEQR
Environmental Assessment Form.
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This review was conducted on behalf of the City of Saratoga Springs for the proposed Saratoga M
Honda Expansion. Our comments are as follows:
SWPPP Review
SWPPP Report
1. Page 1, Section 2.2 — Changes to the SWPPP must be approved by the City prior to any
construction.
2. Page 2, Section 3.5, 2nd paragraph — Please review wording. Our recommendation is that
an updated letter by obtained from OPRHP as the last letter was dated 4/9/2014 —
approximately 5 years ago and regulations, etc. may have changed.
3. Page 7, Section 5.4—The Peak flows indicated in the Table do not match the calculations.
4. Page 10, Section 8 -Section references "items" but there are only "bullets".
5. Please show concrete washout locations, staging areas, etc.
6. The area under existing and proposed conditions should be the same.
7. Subarea 1.1s — Please explain how the Time of Concentration is the same under existing
and proposed conditions when the path has changed? Please verify the CN number for
existing and proposed conditions.
8. Subarea 1.1s—Please explain how the time of concentration path was chosen.
Tim Wales, P.E.
PB No. 20190098
March 28, 2019
Page 2 of 3
9. Please explain why the size of the infiltration area has been reduced in area?
10. Please provide infiltration tests results. Please insure that the tests have been completed in
conformance with the guidelines noted in the NYS Stormwater Management Design
Manual.
11. As noted in the NYS Stormwater Management Design Manual, infiltration must be
separated by at least 3 feet vertically from seasonal high-water table. Please verify.
12. Post Development Subarea 3.3s — Why is the Time of Concentration for Proposed
Conditions less than the Tc for Existing Conditions?
13. Is the pocket pond suppose to hold water permanently up to an elevation of 305'? If so, is
the pond lined?
14. For storms larger than the 100-year storm, how will stormwater runoff overflow the
infiltration basin? Should an emergency overflow be installed?
15. Since pervious pavement will be installed over the existing pocket pond and infiltration
area, please discuss what soil will be removed and what material will be installed within
these areas.
16. Modeling of the culvert in HydroCad indicates 45LF while the Record Drawings indicate
85LF. Please verify.
PLANS
Sheet L-1.0
17. What is the purpose of the "Woods Road".
18. Silt Fence should be installed parallel to contours and not just along property lines.
19. The vegetation within the pocket pond and infiltration basin should be denoted as being
removed.
20. How will the infiltration basin be protected from stormwater runoff during construction?
Sheet L-3.0
21. Please provide areas for contours associated with the pocket pond/infiltration area. A post
construction survey will be required to verify the practices were constructed in
conformance with the plans.
Sheet L-6.0
22. Please insure all details meet the City's requirements.
23. Please include a concrete washout detail.
24. Please provide a detail for porous pavement in the areas of the pocket pond/infiltration
C� Tim Wales, P.E.
PB No. 20190098
March 28, 2019
Page 3 of 3
basin. What material will be placed below the 16" depth shown in the detail provided?
25. Stone overflow weir—please define the width.
26. Please define the stone size of Stone Fill(Light).
Should you have any questions, please do not hesitate to contact us.
Very truly yours,
CPL
dahL—L JyyaLt
Matthew T. Smullen, P.E.
Principal