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254 Old Wilson Stormwater Permit 2020-01-09i STORMWATER MANAGEMENT PERMIT v APPLICATION DECISION City of Northampton Department of Public Works Project / Site Name: Flag Lot and Cluster Lots, Pine Grove Golf Course Project Street or Location / Assessor ID: Old Wilson Rd / 044-014-001 Applicant Name: Gil Verrillo Applicant Address/Phone: 254 Old Wilson Road, Northampton, MA Application Submission Date: 11/27/2019 (Revisions submitted 12/18/2019) THE FOLLOWING ACTION BY THE NORTHAMPTON DEPARTMENT OF PUBLIC WORKS HAS BEEN TAKEN ON THIS APPLICATION BASED ON INFORMATION PRESENTED: Disapproval of the Stormwater Management Permit Application based on a determination within seven days of the receipt of the application that the application is administratively incomplete (see attached documentation). Approval of the Stormwater Management Permit Application. X Approval of the Stormwater Management Permit Application subject to any conditions, modifications or restrictions required by the Department of Public Works (see below) Disapproval of the Stormwater Management Permit Application based upon a determination that the proposed plan, as submitted, does not meet the purposes set forth in the Northampton Stormwater Management. Standard Permit Conditions: 1. All clearing, grading, drainage, construction, and development shall be conducted in strict accordance with the following plans and information submitted with the application and as amended by any conditions attached to this permit: a. Site Plans, Pine Grove Gold Course, Flag Lot and Cluster Lots, Old Wilson Road, Northampton, MA, Sheets C.1, C.2, C.3, CA, C.5 and C.6, Revised Dated 1/7/2020, Stamped by Jeffrey Squire, RLA and Christopher M. Chamberland, P.E., Berkshire Design Group. M: Stormwater Management Permits\Old Wilson Rd 254\254 Old Wilson Rd Stormwater Permit.docx Pagel of 4 b. Stormwater Management Report for Pine Grove Golf Course, 254 Old Wilson Rd, Northampton, MA, dated 11/20/2019, Stamped by Christopher M. Chamberland, P.E., Berkshire Design Group. c. Stormwater Management Report Supplement for Pine Grove Golf Course, 254 Old Wilson Rd, Northampton, MA, Analysis of 5 -lot Subdivision, 12/18/2019 Letter from Lucy Conley, P.E., Berkshire Design Group, Figure 6, 5 -Lot Drainage dated 12/18/2019 and HydroCAD Hydraulic Analysis for 5 -Lot Area dated 12/18/2019, prepared by Berkshire Design Group. 2. The Northampton Department of Public Works (DPW) or its authorized representative shall be provided access to the property to conduct inspections before, during, and after construction activities as necessary. The applicant shall arrange with the DPW to schedule the following inspections: Initial Inspection, Erosion Control Inspection, Bury Inspection, and Final Inspection. The DPW may also conduct random inspections to ensure effective control of erosion and sedimentation during all phases of construction. 3. The applicant shall retain a Project Engineer (the design engineer or another professional engineer of record in the Commonwealth of Massachusetts) to document the construction of the proposed stormwater system and site development during all phases of the project. The Project Engineer through routine inspections and surveys shall check elevations, inverts, grading, layout, impervious areas and other critical aspects of the stormwater system as they are being constructed during all phases of the project. All proposed changes to the approved stormwater facilities and site development shall be documented by the Project Engineer and submitted to the DPW for review and approval by the DPW prior to construction. At the completion of the work, including construction of all stormwater management facilities and landscaping, the applicant shall submit to the DPW as -built plans stamped by a professional engineer of record in the Commonwealth of Massachusetts and a statement from a professional engineer of record in the Commonwealth of Massachusetts certifying that the materials and construction of the stormwater management system was constructed in accordance with the approved plans and functions as designed. The as -built plans must include surveyed information documenting the as -built elevations, inverts, grading, layout, impervious areas and other critical aspects of the stormwater management system. 4. Annual Reports that are stamped by a Registered Professional Engineer documenting the actions completed as required by the Operation, Maintenance and Inspection Agreement shall be submitted to the Northampton Department of Public Works by October 1St of each year (see Specific Condition 1 below). 5. If construction of the proposed stormwater system has not started within five years of the issue date of this permit, then the permit will expire and a new permit will be required. Construction is defined as clearing, grading, excavation, filling, and installation of drainage structures on the lots specified in this permit. M:1Stormwater Management Permits Old Wilson Rd_254\254 Old Wilson Rd—Stormwater Permit.docx Page 2 of 4 Specific Permit Conditions: Prior to start of construction and issuance of any Building Permits, the applicant shall record an executed Stormwater Operation, Maintenance, and Inspection Agreement that is binding on all subsequent owners of land served by the private stormwater management facility by recording it in the land records of the Registry of Deeds. The maintenance schedule and responsibility for maintenance of all components of the proposed stormwater management system must be adequately specified in Attachment A to this Agreement. The draft Post Construction Inspection & Maintenance Schedule submitted as part of the Drainage Report must be revised to the satisfaction of the DPW for use as Attachment A to the Agreement. The DPW can provide additional guidance on required revisions to the maintenance schedule. Attachment B to the Agreement must specify all stormwater management easements that have been provided for off-site stormwater control, stormwater management structures, access for facility maintenance and preservation of stormwater runoff conveyance including flood routes for the 100 -year storm event. The final agreement shall be approved by the Northampton DPW and signed by the owner and the Mayor of Northampton. The final agreement shall be recorded at the Registry of Deeds at the owner's expense. Section 281-8 of the Northampton Stormwater Management Ordinance provides additional guidance for the requirements of this agreement. 2. This project will be required to submit one or more Notice of Intent (NOI) to the U.S. EPA for coverage under the NPDES Stormwater Construction General Permit. A copy of the final NOI and Stormwater Pollution Prevention Plan (SWPPP) shall be submitted to the Northampton DPW for review and approval prior to the start of construction and prior to issuance of a building permit. 3. Construction plans and specifications shall be submitted to the DPW for approval prior to issuance of a building permit and prior to the start of construction. 4. The Within 60 days of the issuance to this permit, plans and documents must be submitted to the DPW for review and approval to address the following issues: a. A Demolition Plan must be provided that clearly specifies all the structures, paved area and utilities to be removed and describe how these areas will be stabilized. b. An Erosion and Sediment Control Plan must be provided that includes protection and stabilization of all areas to be disturbed including during demolition. c. Revised drywell detail that includes specification for gravel around the proposed drywell. 5. Drywells have been specified for roof runoff from each proposed building. Prior to the installation of each drywell, the Project Engineer must confirm the soil conditions (soil types, soil textures, estimated seasonal high groundwater elevation and extent of any restrictive soils) in the area of each dry well and determine if the proposed dry well design is suitable. The Project Engineer shall provide documentation to the DPW of the soil and groundwater conditions and the final dry well design for each building. M:IStormwater Management Permits Old Wilson Rd_254\254 Old Wilson Rd Stormwater Permit.docx Page 3 of 4 6. The proposed development and stormwater management system is designed to mitigate peak stormwater flows. If, after construction of the proposed system, the system is found to increase stormwater flows or pollutants in these flows to adjacent properties, roadways and stormwater systems, the owner shall redesign and reconstruct the stormwater management system to prevent any increased stormwater flows or pollutants in these flows to adjacent properties, roadways and stormwater systems. Signature of City Engineer Date cc. Planning Board c/o Office of Planning and Development Building Department M: Stormwater Management Permits Old Wilson Rd 254\254 Old Wilson Rd _ Stormwater Permit.docx Page 4 of 4