Engineering_2nd review
North Country Office
100 Glen Street, Glens Falls, NY 12801
P: (518) 812-0513 F: (518) 824-8391
www.chazencompanies.com
Hudson Valley Office (845) 454-3980
Engineers
Environmental Professionals Capital District Office (518) 273-0055
Land Surveyors
Landscape Architects
Planners
May 22, 2012
Mr. Craig Brown
Zoning Administrator and Code Compliance Officer
Town of Queensbury
742 Bay Road
Queensbury New York 12804
Delivered via email only: CraigB@queensbury.net
Re: Ben Aronson Site Plan Review
Town of Queensbury, Warren County, New York
Chazen Project # 91204.08
Queensbury Ref No: Site Plan 21-2012
Dear Mr. Brown:
The Chazen Companies (Chazen) has received the latest submission package from your office for the
above referenced project. Based upon our review of the informati
comments for the Towns consideration:
Stormwater Management & Erosion and Sediment Control:
1.In response to Comment 2 of Chazens April 3, 2012 letter, the applicant indicates that it is their
opinion is that drywells can be used to in parking lot applicati
pretreatment device. Our office does not take exception to this
application; however, the pretreatment device shall be in conformance with the require
the NYSDEC SWMDM. As such, and as previously commented, the prop
to be used for pretreatment, shall be modified to meet the design specifications for bioretention
filtering system found in Section 6.4 of the NYS SWDM (Section 5.3.7 of the NYS SWMDM s
that rain gardens cannot be used to treat parking lot or roadway
modified to include the elements of a bioretention facility). Specifically, this design should include
2.5-4 feet for planting soil as the filter medium. Our office takes no exception to a storage course
below the planting medium.
2.In response to Comment 7 of Chazens April 3, 2012 letter, the Applicant states that the time of
concentration (Tc) is based on the longest flow path within the subcatchment to the design point.
However, the Tc is actually measured from the most hydraulically
subcatchment to the end of the subcatchment or when a stormwater control device is located
within a subcatchment, the Tc should end at the control device.
Subcatchments S2 and S3 the Tc should end at the respective sto
flow that is discharged to the design points from the control devices should be modeled as
Town of Queensbury
Site Plan 21-2012 Ben Aronson
May 22, 2012
Page 2
secondary outlets of the control devices and through subsequent
shall revise.
Conclusions and Recommendations
It is our opinion that the applicant should provide clarification for the above it
changes in subsequent plan submissions.
If you have any questions regarding the above, please do not hes-1926.
Sincerely,
Sean M. Doty, P.E., LEED AP
Senior Project Engineer
cc: Pam Whiting, Town Planning Office Administrator (via email)
Keith Oborne, Town Planner (via email)
Joel Bianchi, P.E., Senior Director - Municipal Engineering (via email)
File
R:\9\91200-91299\91204.00 -Town of Queensbury PB Engineer\91204.08 -SP 21-2012-Ben Aronson -Jarrett\SP 21-2012 Ben Aronson 05-22-12.docx