Stormwater Permit North Street Condominiums_SP09003
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City of Northampton
Department of Public Works
STORMWATER MANAGEMENT PERMIT
APPLICATION DECISION
Project / Site Name: North Street Condominiums
Project Street or Location / Assessor ID: North St & Northern Ave. / 25C-017, 25C-012
Applicant Name: Tofino Associates, Inc. and Northern Avenue Homes, Inc.
Applicant Address/Phone: 31 Campus Plaza Rd., Hadley, MA / 413-256-0321
Application Submission Date: 11/1
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:
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. Notice of Intent Plans For: North Street Condominiums, Sheets L , L2a, L2b,
L3a, L3b, L4, L5, EC I, dated 4/14/2009, stamped by Mark B. Darnold, P.E., The
Berkshire Design Group, Inc.
b. Stormwater Drainage Report for North Street Condominiums, Northampton, MA,
dated April 14, 2009, prepared and stamped by Mark B. Darnold, P.E., The
Berkshire Design Group, Inc.
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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 the work, including construction of stormwater management
facilities and landscaping, the applicant shall submit a statement to the DPW 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
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 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.
Specific Permit Conditions:
Prior to issuance of a Building Permit, 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. This agreement shall be
approved by the Northampton DPW and signed by the owner and the Mayor of
Northampton. Section 22-85 of the Northampton Stormwater Management Ordinance
provides additional guidance for the requirements of this agreement.
a. The Operation, Maintenance, and Inspection Agreement shall include additional
requirements that the owner provide documentation that the rain gardens and dry
wells continue to function as designed. Regular inspection and maintenance of
these structures shall be included in the Stormwater Operation, Maintenance, and
Inspection Agreement. Ponded water inside the rain gardens or dry wells after 72
hours can indicate that the bottom of the rain gardens or dry well is clogged. The
owner is required to repair, replace, or reconstruct the rain gardens or dry wells if
they fail to operate as designed. A system fails to operate as designed when water
is standing 72 hours or longer following a storm event greater than 1 inch over 24
hours.
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b. The Operation, Maintenance, and Inspection Agreement shall include additional
requirements to clean sediment and debris out of the permeable pavers in the
proposed snow melt trenches.
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 approval prior to the start of construction and prior to issuance
of a building permit.
3. All detention basins, rain gardens, outlets, and other non-piped components of the
proposed stormwater system shall be constructed and stabilized prior to receiving
drainage flows from the proposed development.
4. The DPW shall require from the applicant a cash escrow, irrevocable letter of credit, or
other means of security acceptable to the DPW prior to the start of construction or
issuance of any building permit. The amount of the security shall not be less than the total
estimated construction cost of the stormwater management facility. The guarantee shall
include provisions relative to forfeiture for failure to complete work specified in the
approved stormwater management plan, compliance with all of the provisions of the
Northampton Stormwater Management Ordinance and other applicable laws and
regulations, and any time limitations. The guarantee shall not be fully released without a
final inspection of the completed work by the City Engineer, submission of "As-built"
plans, and certification of completion by the Department of Public Works of the
stormwater management facilities being in compliance with the approved plans and the
provisions of the Northampton Stormwater Management Ordinance.
5. If existing fill composed of asphalt, brick, concrete, and construction debris is present
under or adjacent to any proposed rain gardens or dry wells, the debris or waste must be
removed in accordance with all applicable Solid and Hazardous Waste Regulations (see
310 CMR 19.000 and 40.0000) and replaced with clean material suitable for infiltration.
The DPW must be notified during excavation of fill material so that a site inspection can
be scheduled.
6. The proposed detention basin, rain gardens, and dry wells have been designed with a
specific volume capacity as well as expected infiltration rates as documented in the
approved drainage calculations. If after construction of the proposed drainage structures,
the basins and dry wells are found to hold water for an extended time period (greater than
72 hours) after a storm event so that the volume capacity or actual infiltration draw-down
of the basins or dry wells has been reduced from that specified in the drainage
calculations, the owner shall redesign and reconstruct the drainage system to meet the
requirements of the Northampton Stormwater Management Ordinance.
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7. Prior to the start of construction, the applicant shall submit to the Northampton DPW for
approval revised site plans that include all revisions required by the Northampton
Planning Board and Northampton DPW.
I A 1, A ç 6
sture oft , r g neer Date
cc. Planning Board c/o Office of Planning and Development
Building Department
Conservation Commission c/o Office of Planning and Development
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