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Engineering comments 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 February 10, 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: Cellco Partnership d/b/a Verizon Wireless Lands of Town of Queensbury Town of Queensbury, Warren County, New York Chazen Project # 91204.04 Queensbury Ref No: Site Plan 7-2012 Dear Mr. Brown: The Chazen Companies (Chazen) has received the latest submissionto technical comments offered by Chazen on January 12, 2012. Based upon our review, C for the Towns consideration: Stormwater Management & Erosion and Sediment Control: 1.In response to comment 1 of Chazens January 12, 2012 letter, the Applicant has provided stormwater calculations for the 50-yr storm interval in conformance with Section 179-6-080 of the Town code. However, the results of these calculations indicate that the proposed improvements will result in a very small increase in stormwater runoff from existing to proposed conditions, and therefore does not meet the above referenced cod that this increase is negligible and has indicated that post-construction stormwater controls are not necessary. As such, the Applicant must request a waiver from the pos-development runoff requirements. Due to the highly permeable soils on-site and the minimal increase in stormwater runoff, we would not take acceptance to the Planning Board granting said waiver. 2.In response to comment 5 of Chazens January 12, 2012 letter, the Applicant has indicated that the proposed roadside swale will be vegetated as grass and no further lining of the swale is proposed. It is noted that this swale is quite steep, and that armoring the swale may be necessary. It is requested that the Applicant provide flow calculations for the runoff that is expected to in the swale, based on a 100-year return interval storm, and provide channel Town of Queensbury Cellco Partnership February 7, 2012 Page 2 armoring as necessary. Also, the Applicant could consider incorporating the temporary check dams to be used in the swale during construction, be made permanent as they would promote the infiltration of stormwater within the swale. Conclusions and Recommendations It is our opinion that the applicant should provide clarificatio changes in subsequent submissions. If you have any questions regarding the above, please do not hesitate to me at (518) 824-1926. 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\91204.04 -SP 7-2012-Cellco Partnership -1127 West Mountain Road\Cellco SP7-2012_02-10-12_L2.doc