33.6 MW Hydro operating in Windham, VT — ISO New England Inc.
33.6 MW
Nameplate Capacity
3
Generators
units
Conventional Hydroelectric
Technology
1924
Operating Since
Coordinates
42.7579, -72.9290
County
Windham, VT
Nearby Plants
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Great River Hydro, LLC | — | — |
| Owner(s) | Great River Hydro, LLC | — | — |
| Status | Operating | — | — |
The Harriman hydroelectric plant is located in Windham County, Vermont. It has a total capacity of 33.6 MW across three generators and primarily uses water as its fuel source. The plant began operating in 1924 and is owned and operated by Great River Hydro, LLC. Harriman ranks as the fourth-largest of 46 power plants in Vermont and 385th-largest of 1464 plants nationally.
The plant operates within the ISO New England Inc. balancing authority and the Northeast Power Coordinating Council (NPCC) NERC region. The latest annual generation data indicates an output of 91,466 MWh, resulting in a capacity factor of 31.0%. Financial data indicates a power purchase agreement (PPA) price of $60 per MWh, as reported to FERC.
Generated from EIA, GEM, and public data sources
NERC Region
NPCC
Balancing Authority
ISO New England Inc.
Grid Voltage
115 kV
Regulatory Status
NR
Entity Type
Independent Power Producer
Sector
IPP Non-CHP
7.9K MWh
Latest Month
91.5K MWh
Annual Generation
31.0%
Capacity Factor
$60.0/MWh
PPA Price
Great River Hydro, LLC
Contract Seller
Point of Interconnection
Nearest Substation
Harriman 115kV Substation · 115 kV
Substation Distance
< 10 km
Operator
National Grid
Coord Source
OSM spatial
Market Position
ISO/RTO Market
ISO-NE
LMP Node
435
Pricing Hub
.Z.VERMONT
Node Source
EIA-860 direct report
Last updated 2026-03-25
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