April 2, 2019: The Low Impact Hydropower Institute has received a complete application for Low Impact Certification of the Gorham Hydroelectric Project.  LIHI is seeking public comment on this application.  Specifically, we are interested in knowing whether you think the Project meets the LIHI Low Impact Certification Criteria, as revised in the 2nd Edition Handbook.  Please review the program and criteria in LIHI’s revised Handbook and then review the Project’s application materials below.

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 “Gorham Project Comments” in the subject line, or by mail addressed to the Low Impact Hydropower Institute, 329 Massachusetts Avenue, Suite 6, Lexington, MA 02420.  Comments must be received on or before 5 pm Eastern time on June 1, 2019 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 Gorham Hydroelectric Project (Project) is located on the Androscoggin River in northern New Hampshire in Coos County, and in the town of Gorham. The Project is one of seven hydroelectric projects within an 11-mile reach of the Androscoggin River between Berlin and Shelburne, New Hampshire. There are five hydroelectric projects within 8-river-miles upstream of the Gorham Project; the Shelburne Project is approximately 2.8-river-miles downstream of the Gorham Project. The Gorham Project is owned by HSE Hydro NH, LLC and operated by Central Rivers Power NH, LLC.

Project Name Gorham
Owner Central Rivers Power NH, LLC
State New Hampshire
Location River mile 118.5 on the Androscoggin River in Gorham NH
Installed Capacity 2.15 MW
Average Annual Generation 10,727 MWh
Facility Type Run of river
FERC No. 2288

The Gorham Project consists of an impoundment, dam, powerhouse, tailrace channel, transmission lines, transformers, and appurtenant facilities. The general Project area extends from the dam downstream approximately 2,070 feet and upstream approximately 4,700 feet.  The Project operates as an un-manned, run-of-river facility with no impoundment fluctuations. A continuous minimum flow of 200 cfs is released from the dam.

The dam is a timber crib, L-shaped dam, 417 feet long and about 20 feet high, with three sections, each topped with flashboards of varying heights. An earthen power canal conveys water from the impoundment to the powerhouse and is approximately 415 feet long by 60 feet wide and 20 feet deep.  The powerhouse contains two 400-kW Allis-Chalmers generators driven by two 583-horsepower (hp) S. Morgan Smith vertical, Francis-type turbines, and two 675-kW Allis-Chalmers generators driven by two 1,000-hp Allis-Chalmers vertical, propeller-type turbines, totaling a maximum hydraulic capacity of about 2,800 cfs, at an operating head of approximately 18 feet.