Summit Oaks at Village Hill_DenialSTORMWATER MANAGEMENT PERMIT
APPLICATION DECISION
City of Northampton
Department of Public Works
Project I Site Name: Summit Oaks at Village Hill
Project Street or Location I Assessor ID: Ford Crossing and Olander Drive
Applicant Name: Berkshire Design Group, c/o Energy Positive Homes, LLC
Applicant Address/Phone: 332 West Main Street, Ayer, MA 01432 I 978-597-0542
Owner Name: Hospital Hill Development LLC
Owner Address/Phone: c/o MA Development Finance Agency, 99 High Street, Boston, MA 01469
Application Submission Date:_,6~/~12=/=2=0~15~-------------------
THE FOLLOWING ACTION BY THE NORTHAMPTON DEPARTMENT OF PUBLIC
WORKS HAS BEEN TAKEN ON THIS APPLICATION BASED ON INFORMATION
PRESENTED:
__x_ Disapproval of the Stormwater Management Permit Application based on a
determination that the application is administratively incomplete (see
attached documentation)
__ Approval of the Stormwater Management Permit Application
__ 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
11/t-s) Ir-, Date
cc. Planning Board c/o Office of Planning and Sustainability
M:\Stormwater Perrnits\Village Hill_ Summit Oaks\Surnrnit Oaks at Village Hill_ Denial.docx
Page l of l
NORTHAMPTON DEPARTMENT OF PUBLIC WORKS
NOTICE OF INCOMPLETE APPLICATION
STORMWATER MANAGEMENT PERMIT
Project / Site Name: Summit Oaks at Village Hill
Project Street or Location / Assessor ID: Ford Crossing and Olander Drive
Applicant Name: Berkshire Design Group c/o Energy Positive Homes. LLC
Applicant Address/Phone: 332 West Main Street. Ayer. MA 01432 I 978-597-0542
Owner Name: Hospital Hill Development LLC
Owner Address/Phone: c/o MA Development Finance Agency. 99 High Street. Boston MA 01469
Application Submission Date:~6~1=2~2=0~1~5~-----------------------
The Northampton Department of Public Works (DPW) is in receipt of the application for a
Stormwater Management Permit for the above referenced project. The application has been
found to be incomplete. The timeline for application review and final action by the
Northampton DPW will begin once a complete application has been submitted. The
application is incomplete for the following reason(s):
__ The Stormwater Management Permit Application is not complete and/ or signed:
_x_ The Permit Review and Inspection Fee is not paid.
• The Stormwater Management Permit review and inspection fee for a residential subdivision and
other residential such as townhouse or retirement development is described as follows: $2,000 or
$2 per linear foot of roadway or common driveway (whichever is greater). A fee of $2,000 was
submitted. The plans for the proposed project plans show a 1, 190 foot subdivision roadway and
an uncalculated length of common drive. The total length of common driveway must be
determined and a fee calculated based on $2 times the total length of subdivision road and
common driveway. The additional fee amount should be submitted.
____x_ The Operation, Maintenance, and Inspection Agreement was not submitted
and/ or is not complete.
• No information has been submitted regarding operation, maintenance and inspection of the
proposed stormwater management system.
____x_ The Stormwater Management Plan and Erosion and Sediment Control Plan are
not complete. The following information has not been submitted and/ or is not
complete:
• Full set of stamped plans
• Completed and stamped MA DEP Checklist for Stormwater Report
• Calculations documenting that the stormwater treatment train(s) meet the 80% TSS
removal requirement
• Erosion and Sediment Control Plan for all phases of constmction
• Post Constiuction Operation and Maintenance Plan
• Additionally the plans and information that have been submitted require revision or
additional information as follows:
o The HydroCAD drainage calculations submitted as part of the Drainage Report
for Village Hill Subdivision, June 3, 2015, stamped by Mark B. Darnold, P.E.,
The Berkshire Design Group, are based on conceptual 1/8 acre lots with 65%
impervious and do not adequately represent the proposed build out of the site as
shown on the proposed plans. The proposed conditions drainage calculations
must be revised to include the actual areas of impervious and other surface types
as represented in the subdivision and site plans.
o The specifications in the drainage calculations must be consistent with the
information in the plans. For example the drainage calculations have an elevation
of the detention basin outlet control structure broad crested weir at 188 feet but
Detail 10 on sheet 8.3 of the subdivision plans specifies: "Lower existing weir
elevation to 189 .00"
o The impe1vious area used to determine the required recharge volume is based on
conceptual 1/8 acre lots with 65% impe1vious. The impe1vious area used to
determine the required recharge volume should be based on the impervious area
shown in the site plans.
o A detail for the proposed dry wells to be constructed for 64 buildings was not
included in the subdivision plans.
o The Grading Notes on Sheet 1.1 includes specification that "all new or adjusted
catch basin rims shall be set \12 inch below finished grade. There is no
corresponding note or information in Detail 11/8.3 for Area Drains describing
the height of the rims for these structures in relation to the surrounding grade.
o Proposed vegetated swales have been designed on both sides of the proposed
subdivision roadway for conveyance of stormwater. No information has been
provided specifying soils in the proposed drainage swales. Based on the
description of the native soil and groundwater conditions, the design of the area
drains and the lack of a proposed underdrain system, the swales may hold water
for extended periods. The pollutant removal capacity of the swales is
undetermined and may be limited. Additionally the DPW has concerns regarding
the higher degree of maintenance required for vegetated swales that may not
drain well and the potential for damage from off-street parking and snow
removal. The design of the swales should be revised to provide better pollutant
removal, improved protection from off-street parking, greater ease of
maintenance and better overall function.
o The drainage system design for the roadways and parking lots in the proposed
cohousing portion of the project do not include any proposed Low Impact
Development drainage features. The design of the drainage systems for these
2
paved areas should be revised to utilize some low impact development features
or an explanation provided as to why LID is not possible.
Please submit the necessary items to the Northampton Department of Public Works as soon as
possible to start the application review process. For additional information contact Doug McDonald
at 413-587-1582 or e-mail at dmcdonald@northamptonrua.gov.
3