Berlin Gorham — Plant Summary
- EIA Plant ID
- 54639
- Capacity
- 44.3 MW
- Primary Fuel
- Hydro
- Technology
- Batteries, Conventional Hydroelectric
- Status
- Operating
- Location
- Coos, NH
- Operating Since
- 1914
- Generators
- 22
- Operator
- Great Lakes Hydro America LLC
- Parent Company
- —
- Annual Generation
- 133,480 MWh
- Capacity Factor
- 34.3%
- Balancing Authority
- ISO New England Inc.
- ISO/RTO
- ISONE
- NERC Region
- NPCC
Berlin Gorham
OperatingBESSHydroHybrid
Ranked #3 of 32 Hydro plants in NH#320 of 1454 nationally
44.3 MW Batteries (14 MW) + Conventional Hydroelectric (30 MW) operating in Coos, NH — ISO New England Inc.
EIAWD
44.3 MW
Nameplate Capacity
22
Generators
units
Hybrid (2)
Technology
Batteries + Conventional Hydroelectric
1914
Operating Since
Location
Coordinates
44.3889, -71.1645
County
Coos, NH
Nearby Plants
- GorhamHydro2.2 MW · 0.1 km
- Brassua Hydroelectric ProjectHydro3.6 MW · 2.8 km
- CascadeDistillate Oil7.2 MW · 6.9 km
Ownership & Operator
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Great Lakes Hydro America LLC | — | — |
| Owner(s) | Great Lakes Hydro America LLC | — | — |
| Status | Operating | — | — |
Ownership Chain
No GEM tracker match for this plant — ownership chain unavailable.
About
The Berlin Gorham power plant is located in Coos County, New Hampshire. The facility, which began operating in 1914, has a total capacity of 44.3 MW across 22 generators and is owned and operated by Great Lakes Hydro America LLC. The plant is a hybrid facility utilizing both conventional hydroelectric generation and battery storage. The primary fuel source is water (WAT). Berlin Gorham ranks 3rd out of 32 power plants in New Hampshire and 324th out of 1464 plants nationally.
The plant includes a battery energy storage system (BESS) with a capacity of 14 MWh and a duration of 1 hour, utilizing lithium-ion battery chemistry (LIB). The latest annual generation data indicates an output of 133,480 MWh, resulting in a capacity factor of 34.3%. Berlin Gorham operates within the ISO New England Inc. balancing authority and the Northeast Power Coordinating Council (NPCC) NERC region.
Generated from EIA, GEM, and public data sources
Engineering & Generators
Grid Context
NERC Region
NPCC
Balancing Authority
ISO New England Inc.
Grid Voltage
22 kV
Regulatory Status
NR
Entity Type
Independent Power Producer
Sector
IPP Non-CHP
Generation
9.5K MWh
Latest Month
133.5K MWh
Annual Generation
34.3%
Capacity Factor
Jan 2022 – Dec 2024
Financial Data
No financial data available for this plant.
Pricing & Market Data
HIGH confidenceMarket Position
ISO/RTO Market
ISO-NE
LMP Node
—
Pricing Hub
.Z.NEWHAMPSHIRE
Node Source
OSM spatial match
4002 Z_NewHampshireSubstation
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Last updated 2026-03-26
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