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SP 16-2017 Gutske_3 15 17 Engineering Comments THE Cba � North Country Office �� 375 Bay Road, Queensbury, NY 12804 �"�.J" f��''Y ��� P: (518) 812-0513 F: (518) 812-2205 I www.chazencompanies.com Proud to be l:rnT)1 yee Owned Engineers Hudson Valley Office (845)454-3980 Land Surveyors Capital District Office (518) 273-0055 Planners Environmental Professionals Landscape Architects March 15, 2017 Mr. Craig Brown Zoning Administrator and Code Compliance Officer Town of Queensbury 742 Bay Road Queensbury, New York 12804 Delivered via email only: CraigB@gueensbury.net Re: Michael and Erin Gustke Town of Queensbury, Warren County, New York Chazen Project#91700.09 Queensbury Ref#SP16-2017 Dear Mr. Brown: The Chazen Companies (Chazen) has received a submission package from your office for the above referenced project. The applicant intends to demolish the existing structure and construct a new single family home. Submitted information includes the following: • Site Plans and floor plans prepared by Rucinski Hall Architecture, dated February 14, 2017 (site plan drawing stamp); • Existing Conditions and Topography map prepared by Darrah Land Surveying, PLLC, dated July 11, 2016; • Short EAF; • Town of Queensbury Site Plan Application; Your office has requested that we review the design of stormwater system it relates to compliance to local, state or relevant codes/regulations and general practice. Based upon our review, Chazen offers the following comments for the Town's consideration: Stormwater Management& Erosion and Sediment Control: 1. According to the Site Plan Application the proposed site improvements disturb less than one (1) acre and thus the project is not required to obtain coverage under the NYSDEC SPDES General Permit for Stormwater Discharges from Construction Activity (GP-0-15-002). Comments related to the proposed stormwater management and erosion and sediment control features proposed for the site are offered below: 2. The Applicant should provide the total limits of disturbance on the site plans. The Applicant to clarify if the total land disturbance of 6,660 square feet (Town of Queensbury site plan review Chazen Engineering, Land Surveying&Landscape Architecture Co., D.P.C. Chazen Environmental Services, Inc. The Chazen Companies, Inc. Town of Queensbury Michael&Erin Gustke March 15,2017 Page 2 application) includes land disturbance associated with the future parking area, walking path, and the proposed sewage disposal system. 3. Section 179-6-080 of the Town Code, states that stormwater drainage plans shall analyze the impacts of a project using at least a 25-year return interval storm with regards to both runoff rate and volume for residential projects. Section 179-6-080 prescribes that stormwater management be designed so that post-development runoff rates and volumes are equal to or less than pre-development runoff. The Applicant shall analyze the 25-year storm at a minimum. 4. It does not appear that stormwater calculations are provided. The Applicant shall revise the site plan to include supporting stormwater calculations that show how stormwater will be managed on-site. The Applicant shall include details of the stormwater controls along with maintenance and operation procedures. The design of the stormwater controls shall conform to the NYS Stormwater Design Manual in accordance with town code Chapter 147-9. 5. The Applicant should provide more information on the stream. Is it a perennial or intermittent stream? Is the stream a DEC classified stream? 6. Erosion controls are not depicted on the site plan. The Applicant shall revise the site plan to include erosion and sediment controls and details in accordance with the latest version of the New York State Standards and Specifications for Erosion and Sediment Control (NYS SSESC) in accordance with town code Chapter 147-9. It appears that the proposed land disturbance located to the east of the house is located on slopes approaching 1H:1V. The NYS SSESC states, "Cut and fill slopes that are to be stabilized with grasses shall not be steeper than 2:1. When slopes exceed 2:1, special design and stabilization consideration are required and shall be adequately shown on the plans. Reverse slope benches or diversion shall be provided whenever the vertical interval (height) of any 2:1 slope exceeds 20 feet..." The Applicant shall depict erosion and sediment control features for the land disturbance proposed on steep slopes. The Applicant shall provide details for the erosions and sediment control features as well. The erosion and sediment control design shall conform to the NYS SSESC. 7. The 'future crush stone parking area' does not depict proposed grading, is proposed on slopes of about 68%, and is depicted over a portion of the stream bed. The Applicant shall substantiate the design of the future parking area that includes, but is not limited to, proposed grading and proposed drainage features within the stream. 8. It appears that the proposed drainage channel, located behind the house to the east, may direct stormwater runoff onto the neighboring property (Alicia C. Constantino, Trustee). The Applicant shall revise the design to ensure runoff is not directed to neighboring parcels. 9. It is noted that NYSDOH Appendix 5-13.7, Table 1 states the required minimum separation distances to protect water wells from contamination. The Applicant shall ensure stormwater controls conform to the minimum required separation distances to the proposed well and any neighboring wells. Z:\projects\91700-91799\91700.00-T.Queensbury\91700.09-T.Queensbury-SP16-2017 Michael&Erin Gutske\ENG\Review\91700.09-Michae l Erin Gutske_SP16-2017_2017-03-15_L1.docx Town of Queensbury Michael&Erin Gustke March 15,2017 Page 3 Conclusions and Recommendations It is our opinion that the applicant should provide clarification for the above items and incorporate the changes in subsequent plan submissions. If you have any questions regarding the above, please do not hesitate to contact me at (518) 824-1926. Sincerely, : ' �n^ Sean M. Doty, P.E., LEED AP, CMS4S Principal Manager, Municipal Engineering Services cc: Sunny Sweet,Town Planning Office Administrator(via email) Laura Moore,Town Land Use Planner(via e-mail) Z:\projects\91700-91799\91700.00-T.Queensbury\91700.09-T.Queensbury-SP16-2017 Michael&Erin Gutske\ENG\Review\91700.09-Michae l Erin Gutske_SP16-2017_2017-03-15_L1.docx