52.5 MW Batteries (8 MW) + Conventional Hydroelectric (45 MW) operating in Oxford, ME — ISO New England Inc.
52.5 MW
Nameplate Capacity
7
Generators
units
Hybrid (2)
Technology
Batteries + Conventional Hydroelectric
1918
Operating Since
Coordinates
44.5486, -70.6283
County
Oxford, ME
Nearby Plants
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Brookfield Power New England | Brookfield Power New England | — |
| Owner(s) | Brookfield Power New England | Brookfield Power New England | — |
| Status | Operating | operating | — |
GEM identifies the owner as Brookfield Power New England
This entity is not yet in the GEM ownership database — chain unavailable.
The Rumford Falls Hydro Facility is a 52.5 MW hydroelectric power plant located in Oxford County, Maine. It began operating in 1918 and is owned and operated by Brookfield Power New England. The plant utilizes conventional hydroelectric technology and is fueled by water (WAT). It consists of 7 generators and also includes a 16 MWh battery energy storage system (BESS) with a duration of 2 hours, utilizing lithium-ion (LIB) chemistry.
The facility 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, the Rumford Falls Hydro Facility generated 260,527 MWh of electricity, achieving a capacity factor of 56.5%. The plant is ranked as the 6th largest out of 51 power plants in the state of Maine, and ranks 294th out of 1464 nationally. The plant is considered a hybrid facility due to its integration of both hydroelectric generation and battery storage.
Generated from EIA, GEM, and public data sources
NERC Region
NPCC
Balancing Authority
ISO New England Inc.
Grid Voltage
11.5 kV
Regulatory Status
NR
Entity Type
Independent Power Producer
Sector
IPP Non-CHP
16.5K MWh
Latest Month
260.5K MWh
Annual Generation
56.5%
Capacity Factor
No financial data available for this plant.
Point of Interconnection
Nearest Substation
Rumford Substation · 115 kV
Substation Distance
< 10 km
Operator
Central Maine Power Company
Coord Source
OSM spatial
Market Position
ISO/RTO Market
ISO-NE
LMP Node
—
Pricing Hub
.Z.MAINE
Node Source
OSM spatial match
Substation identified. Node ID not yet resolved against ISO roster.
Winter Storm Warning: Northern Oxford; Northern Franklin; Southern Oxford; Southern Franklin; Northern Carroll; Southern C
Winter Storm Warning issued March 21 at 2:18PM EDT until March 23 at 2:00AM EDT by NWS Gray ME
Winter Storm Warning: Northern Oxford; Northern Franklin; Southern Oxford; Southern Franklin; Northern Carroll; Southern C
Winter Storm Warning issued March 21 at 2:18PM EDT until March 23 at 2:00AM EDT by NWS Gray ME
Winter Storm Warning: Northern Oxford; Northern Franklin; Southern Oxford; Southern Franklin; Northern Carroll; Southern C
Winter Storm Warning issued March 21 at 2:18PM EDT until March 23 at 2:00AM EDT by NWS Gray ME
Company presents $1B 'water battery' project to Dixfield board
The pumped storage hydropower project is slated to be located in a relatively undeveloped area in Dixfield, with a small part in Canton.
Last updated 2026-03-21
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