HomeMy WebLinkAbout20190313 Skidmore Swing Bldg Engineering Response 5-20-19 b.,
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May 20, 2019
Timothy Wales, P.R. City Engineer
City of Saratoga Springs
474 Broadway
Saratoga Springs, New York 12866
Re: Skidmore College, Swing Building
Engineering Review
File: 539.050.001 .
Dear Mr. Wales:
Barton & Loguidice, D.P.C. (B&L) has completed a review of the following reports and
information for the Skidmore College, Swing Building project located at 815 North Broadway
proposed by Skidmore College.:
• Application for Site Plan Review with Application Checklists;
• Short Environmental Assessment Form (SEAF), undated, as prepared by Skidmore
College;
• Cost Estimate for Letter of Credit:
• Engineering Report for Water and Sanitary Sewer dated April 4, 2019 as prepared by The
LA Group, P.C.;
• Stormwater Pollution Prevention Plan (SWPPP) dated April 12, 2019 as prepared by The
LA Group, P.C.;
• Plan Set (7 Sheets) dated April 12, 2019 as prepared by The LA Group, P.C.;
This review was conducted on behalf of the City of Saratoga Springs. The above referenced
documents and information were reviewed only with respect to our scope outlined in our task
order/proposal.
General
1. The project site is predominantly an undisturbed, wooded site west of North Broadway
with many mature trees.
2. Existing utilities are close by and able to be connected to. Confirm conditions at existing
manhole, bench and steps, see comment below.
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Tim Wales, City Engineer .
City of Saratoga Springs
May 20, 2019
Page 2 of 3
3. Add NYSDEC stormwater permit to question 2 of SEAF.
4. Add forest to supplement question 14 on the SEAF short form.
5. Some unit costs in the cost estimate seem quite low. Examples are tree clearing for
$5,000 total, Hydrodynamic Separator at $10,000 and concrete sidewalk at $5 per square
foot. Please clarify or revise.
Water and Sanitary Sewer
1. We request confirmation that the new fire sprinkler systems can get the required fire flow
from the system per NFPA standards. Discuss internal plumbing connections to existing
building briefly and show fire flow computations in Engineer's Report. Sprinklers are
proposed for the Swing Building the fire suppression systems must be able to convey the
required fire flow demand based on building construction type, use and occupancy. Can
the existing system and proposed 6-inch connection furnish the required fire flow
reported to be 2,500 GPM as proposed? Have hydrant flow tests taken place?
2. Where will a RPZ backflow preventer be located for this project, inside the building?
Factor in RPZ and all head losses for fire prevention calculations.
3. What is distance from proposed hydrant on north side of building to the building? Should
be 50' or more per NFPA code.
4. Open existing sanitary sewer manhole and assess need to move internal steps if in close
proximity to new pipe from the. Swing Building.
Stormwater
Stormwater Pollution Prevention Plan (SWPPP)
1. Section 3.5 of the SWPPP is inconsistent with question 12a of the SEAF. Please clarify.
2. Add in existing wet pond to section 3.6 as this will treat quality and quantity prior to
discharging to City of Saratoga Springs system.
3. Add provision for City Engineer's office inspection and approval for section 4.3 prior to
removing erosion and sediment control measures.
4. In NOT please add in existing facility wet pond under question 9.
5. Add notes in SWPPP maintenance section and also on plans for the requirement to
coordinate and inspect the stormwater practices with City staff one year after completion.
a. We observed some site excavation during a site visit on 6-21-17. Please verify
levels and intent of disturbances are consistent with NYSDEC requirements and
NOI. Has the NOT been filed yet?
otNe
Tim Wales, City Engineer
City of Saratoga Springs
May 20, 2019
Page 3 of 3
Plans
I. The plan set would benefit with a key map that indicates where the site is on tha campus
wide location plan in our opinion.
L-3
1 Label the width of clearing for the water and sewer service pipelines. Ensure at least 10'
of clearance to trees at ground level.
2. Label all sloped areas to receive stabilization per erosion control matting.
3. How is drainage channel from SE corner of building to existing wet pond? This channel
if fairly deep. There are some elevations (3) along this route. Are there check dams
proposed at these? Label all means of stabilization and velocity controls.
4. Grading for expanding wet pond will receive this drainage channel and should reflect
stabilization of a formed channel all the way down to permanent pool elevation.
L-6
i. Show project specific elevations and dimensions for detail 9, Hydrodynamic Separator.
If you have any questions, please feel free to contact our office.
Sincerely yours,
BARTON & LOGUIDICE, D.P.C.
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Bradley D. Grant
Senior Project Manager
BDGitms
Cc via e-mail-Kari Donahue