Garvins Falls Hydro

Originally built in 1901 by PSNH predecessor Manchester Traction & Light Company, Garvins Falls Hydro is located on the Merrimack River. The plant had only two turbine generators when built; two more were added in 1925. In 1988, the waste gate at the end of the power canal was modified to permit passage of downstream fish. The site has a picnic area as well as a canoe portage around the dam.

Facts at a Glance:

• Turbine/generators: 4
• Unit 1 & 2 gen. capacity (each): 3.25 MW
• Unit 3 gen. capacity: 2.4 MW
• Unit 4 gen. capacity: 3.2 MW
• Total gen. capacity: 12.1 MW
• Unit 1, 2 & 4 turbine horsepower (each): 4,700
• Unit 3 turbine horsepower: 3,500
• Max. gross head: 33 feet
• Reservoir volume: 2,700 acre-feet
• Reservoir size: 640 acres
• Dam height: 20 feet