COMERFORD

How COMERFORD compares

With 140 MW of capacity, COMERFORD ranks 7th among the 59 operating power plants Bywatts maps in New Hampshire and is the largest of the 33 operating Hydro plants in the state. It accounts for about 32% of New Hampshire's operating Hydro capacity and 3.0% of all operating capacity in the state. Nationally it is the 128th-largest of the 1,243 operating Hydro plants in the database. Commissioned in 1930, it is older than 84% of the 58 operating New Hampshire plants with a recorded commissioning year. Its operator, TRANSCANADA HYDRO NORTHEAST INC., runs 3 operating plants in New Hampshire totaling 291 MW. It shares Grafton County with 11 other operating plants, including S C MOORE and GROTON WIND LLC.

EIA-860 lists 4 generators at the site with 168 MW of nameplate capacity, all conventional hydroelectric technology (this page's HIFLD capacity figure is 140 MW). Net generation was 400 GWh in 2024 (a 27% capacity factor), up 24% from 2022.

Grid neighborhood

The nearest named substation is LITTLETON (115 kV), about 5.8 miles away; the closest transmission line found within 10 miles is a 230 kV line owned by PUBLIC SERVICE CO OF NH, under 0.1 miles away. Another 14 operating power plants totaling 276 MW sit within 25 miles; the largest is S C MOORE (140 MW, Hydro).

Computed by Bywatts from HIFLD power plant, substation and transmission line records and EIA-860/923 survey data; distances are straight-line. Sources and methodology