The URL can be used to link to this page

Home My WebLink About20171240 Henry St Condos Chazen Response 7-22-19 THE CAPITAL DISTRICT OFFICE Ch azri civil��nd pEsngineersurveyors 547 River Street Planners Troy, NY 12180 COMPANIES® Environmental&Safety Professionals L�andscape Architects P: 518.273.0055 or 888.539.9073 Prod to be Employee owned Transportation Planners&Engineers www.chazencompanies.com July 22, 2019 Ms. Susan Barden, AICP City Principal Planner City of Saratoga Springs 474 Broadway, Saratoga Springs, New York 12866 Re: City Designated Engineer Services for Technical Review of SWPPP and Site Plans—2nd Submittal Henry Street Condominiums Site Plan 120/128 Henry Street City of Saratoga Springs, Saratoga County, New York City Project No. 17.080 Chazen Project No. 31704.18 Dear Susan: The Chazen Companies (Chazen) have completed our review of the following materials received: • New Water Service Connection Agreement&Application Form, unsigned, dated April 20, 2017. • Stormwater Pollution Prevention Plan, prepared by The LA Group, dated December 11, 2017 and last revised February 12, 2019. • Site drawings entitled "Henry Street Condominiums- 120 Henry Street", dated December 11, 2017 and last revised June 18, 2019, prepared by The LA Group (unless noted otherwise), consisting of the following 11 sheets: o Cover Sheet o Survey Map, entitled "Subdivision Plat—120 Henry Street" prepared by ABD Engineers LLP, last revised October 24, 2018. o L-1 Site Demolition and Preparation Plan o L-2 Site Layout and Materials Plan o L-3 Site Grading Plan o L-4 Site Utility Plans o L-5 Site Details o L-6 Site Details o L-7 Storm Details& Utility Profiles o L-8 Utility Details o A1.4A Green Roof Planting Plan Following are our observations / comments. Comments follow the original numbering in our January 5, 2017 letter. Comments that have been satisfactorily addressed are not repeated; new comments/clarifications are presented in bold. HUDSON VALLEY•CAPITAL DISTRICT• NORTH COUNTRY•WESTCHESTER • NASHVILLE,TN Chazen Engineering, Land Surveying& Landscape Architecture Co., D.P.C. (New York) Chazen Engineering Consultants, LLC(Tennessee) PB No.17.080—Henry Street Condominiums—2nd Submittal Review July 22,2019 Page 2 of 4 Site Plans: 4. The SWPPP identifies that inlet protection measures will be employed for the project however none are shown on the site plans. Please add these to the plan to protect the public storm sewer system near the project site. Though inlet protection has been added, the plans still show stormwater structures on Henry Street that are absent of inlet protection. Please add additional inlet protection to adequately protect the storm sewer system. 6. Please indicate proposed dimensions of the modified parking spaces on the north side of the Four Seasons lot and confirm that they will meet parking space dimensions required by City Code. a. The parking spaces appear to be less than 18'. b. Also, the two-way drive is only 19'when 24' is required. c. Please provide a maneuvering plan showing how the reduction in the drive width allows delivery trucks to access the existing loading dock. The applicant has indicated that the parking spaces will be 15' and the deficiencies identified are preexisting conditions resulting from the approved subdivision.The intent of subdivision approval is not to permit the creation of code violations where they previously did not exist, as is the case with the parking space dimensions.The parking on the Four Seasons lot must remain compliant with City parking requirements; please revise.The driveway width may be considered a preexisting condition if it is not further reduced by this project, however, the applicant is still encouraged to examine the driveway width and maneuvering provisions on the Four Seasons lot and look for opportunities to achieve compliance with this project. 16. It appears that construction easements will be necessary to accommodate grading on the neighboring property owned by McTygue (to the north). Please provide. The applicant has indicated that construction easements will not be required, however,the grading plan shows contours directly abutting the property boundary and this work, as shown,will require a construction easement. 19. Please provide a Lighting Illumination Plan. The applicant indicated that a Lighting Plan has already been reviewed extensively by the City during the SEQRA process.Chazen has not received a copy of the Lighting Plan. Please provide a copy so that we can complete our review. 21. Accessible parking space details must be included in the plans and submitted for review (striping, signage, parking and loading zone dimensions, etc.). The applicant has indicated that the accessible parking spaces will be reviewed and accepted as part of the building permit application, as they are inside the building. The plan set is currently absent of PB No.17.080—Henry Street Condominiums—2nd Submittal Review July 22,2019 Page 3 of 4 sufficient detail for anyone to review accessible parking space striping, signage, etc. Please add the requested detailing. Water Services Connection Agreement: 26. The estimated water generation for the project must be added to the Water Services Connection Agreement and the agreement must be signed. Although the estimated water generation was added to the document,the agreement is still absent of any signature. Please sign. SWPPP: 28. The applicant also requests a waiver from maintaining or reducing 10-year and 100-year storm peak rates of runoff. The submitted HydroCAD model analyzes the green roof as a subcatchment rather than a storage area, so any storage in this system is not accounted for in the calculations. The model should be updated to account for the storage afforded by the green roof system. If the green roof system does not adequately attenuate peak flows, a supplemental detention system such as an underground detention system could be constructed within the parking garage or elsewhere. Please revise the SWPPP accordingly. The applicant has indicated that modeling the green roof with storage does not substantially improve runoff rates for the site.The applicant has indicated that they have presented downstream analysis in accordance with Section 4.10 of the Stormwater Management Design Manual (SMDM) in lieu of maintaining or reducing rates. Per Section 4.10 of the SWMDM,the exemption of extreme flood requirements can be waived by the results of a downstream analysis only if peak flow rates increase by less than 5%of the pre-developed condition for the design storm and if all downstream structures have been evaluated for capacity.The submitted SWPPP reflects post-development peak flow rates that are substantially greater than 5%of the pre-development rates.Additionally, no evidence has been submitted substantiating that the downstream twin box culverts have sufficient capacity to handle the projected increase in flow. There are no obvious site constraints that prevent the implementation of a supplemental detention system designed to attenuate peak flows. Please revise the SWPPP to include such a practice or otherwise achieve compliance with the SMDM. PB No.17.080—Henry Street Condominiums—2nd Submittal Review July 22,2019 Page 4 of 4 In order to expedite and simplify the review of revised materials we would appreciate if the next submission be accompanied by a response letter that describes the revised materials and how our comments were/were not integrated. If you have any comments, questions or need additional information, please do not hesitate to contact this office at 518-273-0055. Sincerely, Jennifer Nechamen, P.E. Project Engineer James J. Connors, P.E., Principal Sr. Director, Engineering Services cc: James J. Connors, P.E., Chazen File