Lexington, Mass. (October 26, 2017) – On October 26, 2017, the Low Impact Hydropower Institute (LIHI) received a complete application from Ampersand Brooklyn Dam Hydro LLC for the Low Impact Certification of the Brooklyn Dam Hydroelectric Project, FERC Exempt No. P-13806, located on the Upper Ammonoosuc River, near Northumberland, in Coos County, New Hampshire.

LIHI is seeking comment on the Brooklyn Dam application for certification. Comments that are directly tied to specific LIHI criteria (flows, water quality, fish passage, etc.) will be most helpful, but all comments will be considered.  Comments may be submitted to the Institute by e-mail at comments@lowimpacthydro.org with “Brooklyn Dam Project Comments” in the subject line, or by mail addressed to the Low Impact Hydropower Institute, 329 Massachusetts Avenue, Suite 2, Lexington, MA 02420.  Comments must be received at the Institute on or before 5 pm Eastern time on December 26, 2017 to be considered.  All comments will be posted to the web site and the applicant will have an opportunity to respond.  Any response will also be posted.

Project Description

The Brooklyn Dam Project was originally constructed in the 1930’s and was owned and maintained through the years by the Groveton Paper Company.  It was washed out in the 1960’s and was gutted and later served only as a flood control dam.  In 2015, the project completed redevelopment with installation of two new turbines within the existing project works which included the existing 120-ft long, 14-ft high spillway dam, floodgate structure, and powerhouse.

Healthy Rivers,Hydropower










certification,Environmental Safety









Project Name Brooklyn Dam
Owner Ampersand Brooklyn Dam Hydro LLC
State New Hampshire
Location Northumberland, Coos County

River mile 3.2

Upper Ammonoosuc River

Installed Capacity 600 kW
Average Annual Generation 1,500 – 2,800 MWh estimated
Facility Type run-of-river
FERC No. Exempt No. P-13806