Pumped storageOperatingCAISO

J S Eastwood

Pumped storage power plant in Fresno County, California. 199.8 MW of nameplate capacity across 1 generator, operated by Southern California Edison Co.

Also known as J S Eastwood Power Station · J.S. Eastwood · JS Eastwood · EIA plant 104

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Big Creek 1Big Creek 2Big Creek 2ABig Creek 8Mammoth PoolBig Creek 3J S Eastwood5 km
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6 plants within 12 km, from EIA coordinates.

Key facts

Capacity
199.8 MWNameplate
Generators
1 operatingEIA-860M, August 2026
Operating since
December 1987First generator online
Operator
Southern California Edison CoEIA operator ID 17609
Grid
CAISOBalancing authority CISO
Price nodes
1 CAISO nodeResource nodes with prices
Location
Fresno County, CA37.1479, −119.2567
EIA plant ID
104EIA plant page

Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.

How much power J S Eastwood produces

Free · EIA-923

Net generation, 2025

87.0 GWh

87,019 MWh, final

Capacity factor, 2025

Not reported

2024: Not reported

January to July 2026

66.7 GWh

Provisional

Range, 2015 to 2025

−1.1–425.1

GWh a year. Low 2023, high 2017

Annual net generation, GWhCapacity factor below each year
Annual net generation from EIA-923
YearNet generation, MWhCapacity factorMonths reported
2000267,872Not reported12 of 12
2001154,166Not reported12 of 12
2002302,431Not reported12 of 12
2003−210,799Not reported12 of 12
2004−155,056Not reported12 of 12
2005338,715Not reported12 of 12
2006295,159Not reported12 of 12
200737,660Not reported12 of 12
200813,450Not reported12 of 12
2009131,112Not reported12 of 12
2010228,795Not reported12 of 12
2011370,077Not reported12 of 12
2012179,428Not reported12 of 12
201372,140Not reported12 of 12
201478,290Not reported12 of 12
201580,397Not reported12 of 12
2016238,699Not reported12 of 12
2017425,140Not reported12 of 12
2018234,070Not reported12 of 12
2019254,677Not reported12 of 12
2020131,832Not reported12 of 12
202139,744Not reported12 of 12
2022145,100Not reported12 of 12
2023−1,140Not reported12 of 12
202417,030Not reported12 of 12
202587,019Not reported12 of 12
2026 (provisional, partial year)66,713Not reported7 of 7

* 2026 covers January to July and is provisional. Capacity factor is net generation divided by nameplate capacity times the hours of each reported month.

Power prices and basis

Free account · CAISO

Emissions

Free · EPA CAMPD

No EPA emissions units are linked to this plant.

Water use

Free · EIA-923 cooling, USGS

No EIA cooling-water record for this plant in 2024. Plants without steam cooling, such as wind, solar and batteries, do not report cooling water.

Generators

Free · EIA-860M
GeneratorTechnologyNameplate MWOnline since
1Hydroelectric Pumped Storage199.8December 1987

Ownership and offtake

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Ownership and offtake are part of Pro

Owners and their shares, parent companies, and power purchase agreements with their buyers. EIA-860M lists Southern California Edison Co as the operator, which is not always the owner.

Modeled data

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Power plants near J S Eastwood

More plants operated by Southern California Edison Co

Questions about J S Eastwood

How much power does J S Eastwood produce?

J S Eastwood reported 87,019 MWh (87.0 GWh) of net generation in 2025. From January to July 2026 it reported 66.7 GWh, which is provisional.

Where is J S Eastwood?

J S Eastwood is in Fresno County, California, at 37.1479, −119.2567. It is in the California Independent System Operator balancing area (CISO).

Who operates J S Eastwood?

EIA-860M for August 2026 lists Southern California Edison Co as the operator (EIA operator ID 17609). The operator is not always the owner.

When did J S Eastwood start operating?

Its first generator began operating in December 1987, according to EIA-860M.

Does InfraMap have power prices for J S Eastwood?

Yes. InfraMap has CAISO day-ahead and real-time prices at 1 price node linked to J S Eastwood, with the hub price and node-to-hub basis. Prices are free with an InfraMap account; pricing node names are part of InfraMap Pro.

Sources

  • EIA-860 2025 (final) and EIA-860M August 2026: plant, generators, capacity, operator and location
  • EIA-923 monthly net generation, 2000 to July 2026 (2026 provisional)
  • CAISO day-ahead and real-time prices; node and hub assignments as of 2026-10-05
  • Plant names from OpenStreetMap, © OpenStreetMap contributors (ODbL)

Page updated 2026-10-04 from the InfraMap data build. Methodology · Data sources · EIA plant page