246-0713.pdfDATE:March 19, 2018 Municipality NORTHAMPTON
(city/town)
RE: NOTIFICATION OF WETLANDS PROTECTION ACT FILE NUMBER
The Department of Environmental Protection has received a Notice of Intent filed in accordance with the
Wetlands Protection Act (M.G.L. c. 131, §40):
Applicant:
Address:
LOCUS:
MASSDOT
10 PARK PLAZA
INTERSTATE 91 INTERCHANGE AT RT. 9 AND DAMON ROAD
Owner:
Address:
This project has been assigned the following file # :WE 246-0713
Although a file # is being issued, please note the following:
Commissioner
MARTIN SUUBERG
Secretary
MATTHEW A. BEATON
Lieutenant Governor
KARYN E. POLITO
Governor
CHARLES D. BAKER
A FILE NUMBER ONLY INDICATES THAT THE APPLICATION CONTAINS THE MINIMAL
SUBMITTAL REQUIREMENTS AND IS ADMINISTRATIVELY COMPLETE - NOT THAT
THE INFORMATION IN THE APPLICATION IS ADEQUATE FOR ISSUANCE OF AN ORDER
OF CONDITIONS.
436 DWIGHT STREET, SPRINGFIELD, MA 01103 413-784-1100
WESTERN REGIONAL OFFICE
DEPARTMENT OF ENVIRONMENTAL PROTECTION
EXECUTIVE OFFICE OF ENERGY & ENVIRONMENTAL AFFAIRS
COMMONWEALTH OF MASSACHUSETTS
BOSTON, MA 02116
[1] Please explain the significant post construction runoff vs. pre, for Design Point G and why this is or is not an
issue.
[2] A CB provides 25%TSS and a sediment forebay provides 25%. An infiltration basin requires that total of 44%
TSS removal prior to the water entering the basin for HSG A or B soils. One only gets a total of 80% for an
infiltration basin. One does not add the pretreatment TSS removal to the 80%.
[3] Are the soils test pit locations shown on the plan and if so, were they taken in the area of the basins as
required?
[4] There should be a statement somewhere in the stormwater report, that the soils found onsite are, or are not, as
those reported in the NRCS soil survey especially regarding HSG information. Please review figure 2.3.1, page 8,
Determining HSG, from Volume 3, Chapter 1 of the Stormwater Handbook.
[5] All Stormwater BMP's must be designed, constructed, operated and maintained per the Stormwater Handbook
Volume 2 Chapter 2 in order to receive any presumptive TSS removal credit. It is recommended that the relevant
This information is available in alternate format. Call Donald M. Gomes, ADA Coordinator at 617-556-1057. TDD# 1-866-539-7622 or 1-617-574-6868.
http://www.mass.gov/dep
Printed on Recycled Paper
MASSDOT
10 PARK PLAZA
BOSTON, MA 02116
sections of the handbook pertaining to each individual BMP be cut and pasted into the Stormwater report, to assist
in Commission review of the stormwater management system.
[6] The Commission should wait to close the public hearing until NHESP has issued its Determination.
If you have any questions regarding this letter, please contact: MARK STINSON @ (413)-755-2257
Cc: Northampton Conservation Commission, CITY HALL, 210 MAIN STREEET RM 11, Northampton, MA, 01060
Natural Heritage & Endangered Species Program, Div of Fisheries & Wildlife Route 135, North Drive,
Westborough, MA, 01581
Representative: TranSystems, 101 Arch Street, BOSTON, MA, 02110
This information is available in alternate format. Call Donald M. Gomes, ADA Coordinator at 617-556-1057. TDD# 1-866-539-7622 or 1-617-574-6868.
http://www.mass.gov/dep
Printed on Recycled Paper