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13 MW Hydro operating in Somerset, ME — ISO New England Inc.
13 MW
Nameplate Capacity
2
Generators
units
Conventional Hydroelectric
Technology
1939
Operating Since
Coordinates
44.9587, -69.8704
County
Somerset, ME
Nearby Plants
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Brookfield White Pine Hydro LLC | — | — |
| Owner(s) | Brookfield White Pine Hydro LLC | — | — |
| Status | Operating | — | — |
Williams Hydro is a 13 MW hydroelectric power plant located in Somerset County, Maine. The plant began operating in 1939 and is owned and operated by Brookfield White Pine Hydro LLC. It utilizes conventional hydroelectric technology with two generators, drawing power from water (WAT) as its primary fuel source. Williams Hydro operates within the ISO New England Inc. balancing authority and the Northeast Power Coordinating Council (NPCC) NERC region.
In the most recent year with available data, Williams Hydro generated 80,159 MWh of electricity, achieving a capacity factor of 70.2%. The plant is ranked as the 16th largest out of 51 power plants in the state of Maine, and 586th out of 1464 nationally. Recent news coverage related to the plant includes topics such as industry trends, regulatory matters, potential hazards, and grid operations.
Generated from EIA, GEM, and public data sources
ISO/RTO
ISO-NE
Market
ISO/RTO Member
NERC Region
NPCC — Northeast Power Coordinating Council
Balancing Authority
7.0K MWh
Latest Month
80.2K MWh
Annual Generation
70.2%
Capacity Factor
2013
$2,294/kW
Est. Construction Cost
Total estimated cost: $29.8M
Point of Interconnection
Nearest Substation
Williams Hydro Substation · 115 kV
Substation Distance
0.071 km
Operator
Central Maine Power Company
Coord Source
OSM spatial
Market Position
ISO/RTO Market
ISO-NE
LMP Node
UN.WILLIAM 6.9 WILL
Pricing Hub
.Z.MAINE
Location Type
NETWORK NODE
Node Source
Curated node match
Last updated 2026-03-26
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ask pi about Williams HydroISO New England Inc. (ISNE)
Grid Voltage
115.0 kV
Regulatory Status
NR — Non-Regulated
Entity Type
Independent Power Producer
Sector
IPP Non-CHP