Coles Meadow Rd_Rockridge_PermitCity of Northampton
Department of Public Works
STORMW ATER MANAGEMENT PERMIT
APPLICATION DECISION
Project I Site Name: Residential Addition to Rockridge Retirement Facility
Project Street or Location I Assessor ID: 25 & 37 Coles Meadow Road I 13-073-001
Owner Name: Deaconess Abundant Life Communities
Owner Address/Phone: 80 Deaconess Rd, Concord, MA 01742 I 413-570-2851
Application Submission Date:"""""2"--/~l 3~/=20~1"-'5'---------------------
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. Proposed Addition to Rockridge Retirement Facility, 25-37 Coles Meadow Rd,
Northampton, MA, Site Plans, Sheets C-1, EC-1, P-1, L-1 , L-2, GR-1, GR-2, GR-3,
UT-1, ES-1, PH-1, D-1 to D-7, GN-1, A-1, L-1, L-2, Stamp Date 2/10/2015,
Stamped by Jesse M. Moreno, P.E., Proterra Design Group, LLC.
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b. Limited Stormwater Hydrology Report for Proposed Addition to Rockridge
Retirement Facility Northampton, MA (including full drainage calculations),
Revised 10/1012013, Prepared by Pro Terra Design Group, LLC.
c. MA DEP Checklist for Stormwater Report, Dated 2/10/2015, Certified and stamped
by Jesse M. Moreno, P.E., Proterra Design Group, LLC.
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 design engineer should be retained by the owner to witness construction and document
that storm water systems are constructed as designed. At the completion of the work,
including construction of 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
will function as designed. All changes to the approved stormwater facilities shall be
documented during construction 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. The preparation of as-built plans requires routine
inspections and surveying of stormwater system components while they are being
constructed.
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:
1. Prior to the start of construction or 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 storm water management
system must be adequately specified in Attachment A to this Agreement. The Long-Term
BMPs: Maintenance section of the Recommended Construction & Long Term Stormwater
Pollution Prevention Plan and Operation & Maintenance Plan submitted in the Limited
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Stormwater Hydrology Report can be used as Attachment A to the Agreement per approval
by the Northampton DPW. A template for the agreement is provided by the DPW and any
changes to this template shall be approved by the Northampton DPW. The approved
agreement shall be signed by the owner and the Mayor of Northampton. Chapter 281 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 approval prior to the start of construction and prior to issuance of a
building permit.
3. 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
stormwater 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.
4. Detail 2/D-1 for Porous Pavement Section is a detail for the use of porous pavers not porous
pavement. It does not specify the depth or materials for the bedding, base and subbase
layers. A revised detail should be included with the construction plans for approval by the
DPW with detailed specifications that are consistent with the recommendations of the
Massachusetts Stormwater Handbook.
5. The drainage calculations included a CN value of 70 and 75 for the areas of porous pavers.
Prior to the start of construction, applicable references describing how these values were
determined for the proposed porous pavers shall be submitted to the DPW for approval.
6. The test pit information submitted for the proposed subsurface infiltration system is not
adequate to determine the seasonal high groundwater elevation at the proposed locations of
the subsurface systems. One test pit and soil information are required for each stormwater
storage location and at each location where porous pavers are proposed. Prior to the start of
construction or issuance of a building permit, a Certified Soil Evaluator or Certified
Professional Soil Scientist must complete these test pits and submit in writing to the DPW
documentation of the soil types, soil textures, the estimated seasonal high groundwater
elevation and extent of any restrictive soils in the area of the systems. The results from these
test pits must show that the bottom of the proposed infiltrating systems have at least 4 feet of
separation to the seasonal high ground water level.
7. Prior to the start of construction, construction plans, stamped by an engineer of record in the
commonwealth of Massachusetts, shall be submitted to the DPW for approval.
8. Prior to the start of construction of the proposed subsurface infiltration systems, the
applicant shall notify the DPW of the expected start date of construction of these structures
for inspection by the DPW.
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I Si a! re of City Engineer -S/ ~k S"
cc. J1anning Board c/o Office of Planning and Development
Building Department
Conservation Commission c/o Office of Planning and Development
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