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1000 MW Hydro operating in Schoharie, NY — New York Independent System Operator
1,000 MW
Nameplate Capacity
4
Generators
units
Hydroelectric Pumped Storage
Technology
1973
Operating Since
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | New York Power Authority | New York Power Authority | — |
| Owner(s) | New York Power Authority | New York Power Authority | New York Power Authority |
| Status | Operating | operating | — |
The Blenheim–Gilboa Pumped Storage Power Station is a pumped-storage hydroelectricity plant in the Catskill Mountains of New York State. The plant is part of the New York Power Authority, and can generate over 1,100 megawatts (1,500,000 hp) of electricity. It is used daily to cover peak demand. There are two reservoirs that are involved in the project, both with a capacity of 5 billion US gallons (19,000,000 m3); one at the foot of Brown Mountain in the Schoharie Valley, and another one at the top of the mountain. The power station has an accumulated capacity of about 12,000 megawatt-hours (43,000 GJ) after storing up to 17,000 megawatt-hours (61,000 GJ).
Read more on WikipediaThe Blenheim-Gilboa Pumped Storage Power Project is a 1,000 MW hydroelectric pumped storage facility located in Schoharie County, New York. It began operating in 1973 and is owned and operated by the New York Power Authority (NYPA). The plant utilizes water as its primary fuel source and consists of four generators. Blenheim-Gilboa is the second-largest pumped storage facility in New York State (out of four) and ranks 21st nationally (out of 194).
The plant operates within the New York Independent System Operator (NYISO) balancing authority and is part of the Northeast Power Coordinating Council (NPCC) NERC region. As a pumped storage facility, Blenheim-Gilboa consumes electricity to pump water uphill to a reservoir during off-peak hours and then releases the water to generate electricity during periods of high demand.
Generated from EIA, GEM, and public data sources
ISO/RTO
NYISO
Market
ISO/RTO Member
NERC Region
NPCC — Northeast Power Coordinating Council
Balancing Authority
New York Independent System Operator (NYIS)
Grid Voltage
345.0 kV
Regulatory Status
RE — Regulated
Entity Type
State
Sector
Electric Utility
−21.8K MWh
Net Charging
-245.3K MWh
Annual Net Energy
-2.8%
Capacity Factor
Positive values indicate net discharge (generation exceeds station load). Negative values indicate net charging. Pure battery storage plants are typically net negative due to round-trip efficiency losses.
2013
$2,294/kW
Est. Construction Cost
Total estimated cost: $2.3B
Point of Interconnection
Nearest Substation
GILBOA___1
Substation Distance
< 10 km
Coord Source
NYISO direct
Market Position
ISO/RTO Market
NYISO
LMP Node
—
Pricing Hub
NYISO Zone F
Node Source
Shared substation inference
Substation identified. Node ID not yet resolved against ISO roster.
Last updated 2026-04-09
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