CT River Greenway & Lane_Permit_20121011STORMW ATER MANAGEMENT PERMIT
APPLICATION DECISION
City of Northampton
Department of Public Works
Project I Site Name: CT River Greenway & Lane Business Park
Project Street or Location I Assessor ID: Damon Road I Lane Plant Road
Applicant Name: City of Northampton
Applicant Address/Phone: 210 Main Street, Northampton. MA 01060
Owner Name: Lane Construction
Owner Address/Phone: 90 Fieldstone Ct Cheshire CT 06410
Application Submission Date:-=8"-/8=-/=2-=-0=12"---------------------
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.
_L 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. Connecticut River Greenway: Lane Business Park & Northampton Community
Boathouse, Site Plans, Sheets El, E2, E3, Sl, S2, S3, S4, SS, S6, Dl, D2 Dated
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October 5, 2012 and revised October 9, 2012, stamped by Mark B. Darnold, P.E.,
The Berkshire Design Group, Inc.
b. MA DEP Checklist for Stormwater Report stamped by Mark B. Darnold, P.E.,
The Berkshire Design Group, Inc, 9/3/2012.
c. Stormwater Drainage Report and Revised Drainage Calculations, CT River
Greenway, Rev 9/23/2012, prepared by The Berkshire Design Group, Inc.
d. Letter to Northampton DPW Re: CT River Greenway & Lane Business Park
Response to Stormwater Permit Comments, from Brian Darnold, EIT, The
Berkshire Design Group, Inc., dated September 5, 2012.
e. Letter to Northampton DPW Re: CT River Greenway & Lane Business Park
DPW Site Plan Review Comments, from Brian Darnold, EIT, The Berkshire
Design Group, Inc., dated October 9, 2012, with attached documents including
revised HydroCAD drainage calculations, Peak Flow Table, and Subcatchment
Plans dated 10/9/2012.
f. CT River Greenway & Lane Business Park, Conceptual Phase 1 Delineation,
Sheet SKI, Dated 9/5/2012, prepared by The Berkshire Design Group, Inc.
g. Connecticut River Greenway & Lane Business Park, Estimated Poor Grass/Soft
Gravel area Map, Dated 91712012, prepared by The Berkshire Design Group, Inc.
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. At the completion of each phase of work, including construction of storm water
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 will function as designed. All changes to the approved stormwater facilities shall be
documented by a professional engineer of record in the Commonwealth of Massachusetts
and approved by the DPW prior to submission of as-built plans and the certification
statement described above.
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 15' of each year (see Specific Condition 1 below).
5. If construction of the proposed storm water 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.
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Specific Permit Conditions:
1. Prior to issuance of a Building Permit for each phase of the project, the owner or
applicant for each phase of the project shall record an executed Stormwater Operation,
Maintenance, and Inspection Agreements that are 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 each Agreement. The draft Proposed Stormwater
Management System Operation & Maintenance Plan for Post-Construction submitted as
part of the Stormwater Drainage Report referenced above must be revised to the
satisfaction of the Northampton DPW including but not limited to the following items:
inspection and maintenance schedule for the level lip spreaders, inspection and repair of
erosion along roadways, and cleaning of the Stormceptors at least once per year. The
DPW can provide additional guidance on required revisions to the maintenance schedule.
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 NP DES Stormwater Construction General Permit during
each phase of the project. A copy of the final NOI and Stormwater Pollution Prevention
Plan (SWPPP) shall be submitted to the Northampton DPW for approval prior to the start
of construction and prior to issuance of a building permit for each phase of the project.
3. Construction plans and specifications for each phase of the project shall be submitted to
the DPW for approval prior to issuance of Building Permits and prior to the start of any
construction. A summary of any revisions to the approved plans should be submitted in
writing.
4. The construction plans must include armoring on slopes greater than 2 to 1 for approval
by the DPW.
5. The construction plans must include specification of the riprap stone size and dimensions
of the proposed riprapped area in the wetland swale and along the driveway for approval
by the DPW. Information must also be provided to the DPW showing that the riprap has
been sized for the expected velocities.
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6. The construction plans must include a high point at the top of the driveway to the dock to
keep drainage going down the driveway from the large paved area to the west.
7. Prior to the start of construction or issuance of a building permit, the applicant must
provide drainage easements for all drainage structures crossing adjacent properties that
stipulates ownership, specifies responsibility for maintenance of the structures, and sets
up provisions for financial guarantees to maintain the structures. The DPW must review
and approve all proposed drainage easements prior to recording at the land records of the
Registry of Deeds.
8. The plans and specifications approved by this Permit include conceptual roadways,
parking areas, and buildings for three commercial buildings. During building and other
permitting applications for these buildings, the applicant for each phase must submit
plans and specifications for approval to the Northampton DPW. If the overall size of the
impervious surface footprint proposed for each building is greater than the area specified
in the approved plans and drainage calculations or if the drainage system is changed in a
substantive way, the applicant shall be required to request and receive approval by the
DPW of an amendment to this Stormwater Management Permit and document the
amended changes with revised plans, specifications, and drainage calculations.
9. The proposed stormwater management system is designed to mitigate peak stormwater
flows. If, after construction of the proposed system, the system is found to increase
storm water flows to adjacent properties or to the municipal storm drain system, the owner
shall redesign and reconstruct the drainage system to prevent any increased stormwater
flows to adjacent properties or the municipal storm drain system.
10. All components of the proposed stormwater system shall be constructed as proposed and
stabilized prior to receiving drainage flows from the proposed development. No
construction phase stormwater flows shall be discharged to the infiltration system.
11. The Recharge Calculations have not been updated to be consistent with the increase of
impervious area specified in the revised Drainage Calculations dated 10/9/2012. The
proposed infiltration trench may need to be enlarged or an additional structure proposed
to meet the required recharge volume. Within 30 days of the issuance of this permit, the
Recharge Calculations dated 9/21/2012 must be revised and the proposed infiltration
system revised on the plans as necessary and resubmitted to the DPW for approval.
g Board c/o Office of Planning and Development
Bu' ing Department
Conservation Commission c/o Office of Planning and Development
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