38A-050 (20) STORMWATER MANAGEMENT PERMIT
. AMENDMENT OF PERMIT
City of Northampton'
Department of Public Works n
j i
Project/ Site Name: The Village at Host)ital Hill, Soujh Campus
Project Street or Location-/Assessor
Applicant Name: Hospital Hill Development, LLC c/o MassDevelopment
Applicant Address/Phone:1441 Main St., Springfield, MA 01103/413-731-8848
Date of Original Permit Decision:_1/13/2005
THE FOLLOWING ACTION BY THE NORTHAMPTON DEPARTMENT OF PUBLIC
WORKS HAS BEEN TAKEN ON THIS APPLICATION BASED ON INFORMATION
PRESENTED:
X Amendment for Lot 12A only to the previously approved Northampton
Stormwater Management Permit issued 1/13/2005 (Permit) subject to any
conditions, modifications or restrictions (see below) required by the
Department of Public Works (DPW) that are in addition to the original
conditions, modifications or restrictions as required by the Permit.
Standard Permit Amendment 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 Plan for Light Industrial Development at The Village at Hospital Hill,
Northampton, MA, Sheets 1-10, dated 6/21/2007, stamped by Robert Eric
Mellstrom, P.E., Stantec Consulting Services, Inc..
b. Letter to Northampton Department of Public Works re. Stormwater Permit
Amendment, The Village at Hospital Hill South Campus Lot 12A, from Richard
Henderson, Executive Vice President, MassDevelopment, dated July 24, 2007.
c. Letter to Northampton Department of Public Works re. Stormwater Permit, The
Village at Hospital Hill South Campus Lot 12A, from Richard Henderson,
Executive Vice President, MassDevelopment, dated July 17, 2007.
d. Letter to Northampton Department of Public Works re. Stormwater Permit, South
Campus The Village at Hospital Hill, from Richard Henderson, Executive Vice
President, MassDevelopment, dated July 24, 2007.
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e. Drainage Plan and Profile, Sheet 5A, South Campus Detention Pond 5, dated
7/2007, prepared by Tighe and Bond Consulting Engineers.
Specific Permit Amendment Conditions:
1. 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 issuance of a building permit.
2. The original Permit specified the following condition (number 3): The drainage from the
proposed 45,000 sq.ft. building on Lot 12A has not been discussed or included in the
drainage calculations. The applicant will be required to submit a separate application
for a Northampton Stormwater Management Permit for this building. The DPW has
waived the requirement for a separate application for a Northampton Stormwater
Management Permit for development in the 45,000 square foot (sf) area specified in
Condition 3 of the Permit. The DPW shall require that within 60 days of issuance of this
amendment to the Permit, the Applicant shall submit revised drainage calculations for the
drainage areas flowing to Detention Basin 5 and to Earle Street showing no increase in
the peak discharge to Drain Point 5 for all design storms and including the 45,000 sf area
excluded in the original drainage calculations. These revised calculations will serve as the
new baseline for review of future development proposals in drainage area 5. Based on the
area specifications in the revised drainage calculations, a revised impervious area
accounting table shall be completed and approved by the DPW and the applicant. The
DPW has prepared a summary table for the South Campus based on the Revised
Stormwater Management Calculations For South Campus Site Plan Submission, dated
April 8,2005 by Beals and Thomas, Inc., pages P-34 to P-41 (see attached Table 1) as
guidance for this table. The three tables attached to the Letter from MassDevelopment
dated July 23, 2007 summarizing impervious areas by Lot do not appear to match the
overall areas specified in the Revised Stormwater Management Calculations For South
Campus Site Plan Submission. The DPW proposes the use of these area numbers as
defined in Table 1 as the accurate reference point to track build out until the drainage
calculations are revised to include the 45,000 sf area on Lot 12A as discussed above.
3. The operation and maintenance of the proposed 24" drain line across Lot 12B from MH-
55 to the Lot 12A property line must be clearly specified and included in drainage
easements and the final Stormwater Operation, Maintenance, and Inspection Agreement
(to be executed by the applicant as specified in Condition 8 of the Permit) as the
responsibility of The Village at Hospital Hill Owners Association.
4. If the drainage structures proposed as part of the Site Plan Permit requested by VCA, Inc
as specified in the Plans referenced above will be owned and maintained by the property
owner of Lot 12A and not by the proposed owners association for The Village at Hospital
Hill, then, prior to issuance of a Building Permit for development on Lot 12A, a separate
Stormwater Operation, Maintenance, and Inspection Agreement that is binding on all
subsequent owners of land served by the private stormwater management facility must be
executed and recorded in the land records of the Registry of Deeds. 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
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provides additional guidance for the requirements of this agreement. If the drainage
structures proposed as part of the Site Plan Permit requested by VCA, Inc as specified in
the Plans referenced above will be owned and maintained by the proposed owners
association for The Village at Hospital Hill, then,prior to issuance of a Building Permit
for development on Lot 12A, the Stormwater Operation, Maintenance, and Inspection
Agreement that is binding on all subsequent owners of land served by the private
stormwater management facility must be amended, executed, and recorded by the
applicant in the land records of the Registry of Deeds. 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.
Lv',/� -1 1vqr�
Signat V
of City ineer 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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Table 1
Summary of Drainage Areas for Site Build-Out
The Village at Hospital Hill South Campus
Drainage Areas in Acres Impervious Pervious Total
Areas in Approved Drainage Calculations'
To Detention Basin 52 3.394 3.025 6.419
To Detention Basin 6 2.77 1.384 4.154
To Underground Infiltration 2.19 0.91 3.1
To Underground Detention 0.78 0.15 0.93
To Uncontrolled Runoff 0.76 5.81 6.57
Total South Cam us 1 9.894 11.2791 21.173
Site Plan Proposals: -
VCA Site Plan Proposal for Lot 12A (To Detention
Basin 5) 1.4 1.46 2.86
Remaining Approved Build Out Areas:
To Detention Basin 5 1.994 1.565 3.559
To Detention Basin 6 2.77 1.384 4.154
To Underground Infiltration 2.19 0.91 3.1
To Underground Detention 0.78 0.15 0.93
To Uncontrolled Runoff 0.761 5.81 6.57
Total South Campus 8.4941 9.819 18.313
1 Revised Stormwater Management Calculations for South Campus Site Plan Submission, Beals and Thomas,
Inc., April 8, 2005, pages P-34 to P-41.
2 Area to Detention Basin 5 does not include 1.03 Acres (45,000 sf) on Lot 12A which was not included in
the 4/8/05 Drainage Calculations.