How big is J S Eastwood?

J S Eastwood reports 199.8 MW hydroelectric of operating nameplate capacity. These technology ratings do not establish a common export limit. Source: EIA Sep 2026.

What kind of plant is J S Eastwood?

J S Eastwood is a Hydroelectric Pumped Storage facility in Fresno County, CA, participating in the CAISO market.

Where is J S Eastwood located?

J S Eastwood is in Fresno County, CA, inside the CAISO balancing area.

Who operates J S Eastwood?

J S Eastwood is operated by Southern California Edison Co according to the EIA generator inventory. Reporting membership does not by itself establish ultimate ownership.

How much electricity does J S Eastwood generate?

J S Eastwood reported 168.6 GWh over the twelve months to 2026-07. For a storage plant this is reported gross generation — a discharge proxy, not a cycle count or a conventional capacity factor.

Where does J S Eastwood connect to the grid?

J S Eastwood interconnects at Eastwood, on the Southern California Edison Company system.

How does J S Eastwood compare to other plants?

By capacity, J S Eastwood ranks #27 of 39 operating plants of the same technology nationally. It ranks #5 of 7 in CA.

J S Eastwood — 200 MW hydro plant, Fresno County, CA

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J S Eastwood — 200 MW hydro plant, Fresno County, CA · Ask the Grid

Generation and physical site

EIA plant 104 · Inventory for Sep 2026.

Reported operating nameplate by technology

Hydroelectric: 199.8 MW

Operating generators only. Battery power is in MW; stored energy is in MWh. These ratings do not establish a shared export limit.

Generator records (1)

EIA generator status and nameplate capacity for J S Eastwood
Generator	Technology	Status	Power (MW)	Energy (MWh)
1	Hydroelectric Pumped Storage	Operating	199.8	Unknown

Physical map location · OpenStreetMap: 37.14788, -119.25666
Filed location · EIA: 37.14793, -119.25670

Sources and observation dates

Inventory source: EIA-860M workbook (preliminary)
EIA reporting month: Sep 2026
EIA retrieved: Oct 24, 2026
OSM extract: Oct 9, 2026
OSM last mapped edit: Feb 16, 2024
Map prepared: Oct 24, 2026
Field verification: Not reported

Reporting month describes the inventory. Retrieval and map preparation describe processing; an OSM edit does not establish an in-service date.

EIA source inventory

Units and generators

Current generator records and technology attributes reported through EIA-860.

Generator	Capacity	Technology	Operation	Status
1	199.8 MW 199.8 MW summer	Hydroelectric Pumped Storage PS	Dec 1987	Operating

Related parties and identifiers

Parties, market resources, and identifiers tied to this asset, with owner, operator, developer, EPC, compliance provider, and interconnecting entity roles kept separate.

Relationship graph

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AssetOwner / operatorRelated asset

Parties and identifiers

OrganizationRoleBasis

Southern California Edison CompanyOperatorOwner / developer associated with J S Eastwood.

Reporting portfolio

EIA reporting entity

Southern California Edison Co

Entity 17609

Operating portfolio

34 plants

1 states

Reported capacity

2,702.4 MW

Batteries · Conventional Hydroelectric · Hydroelectric Pumped Storage

Largest reported plants in this portfolio
Largest reported plants	Capacity	State
Mountainview Generating Station	1,036.8 MW	CA
Cathode (Hinson) BESS	200 MW	CA
J S EastwoodCurrent	199.8 MW	CA
Mammoth Pool	190 MW	CA
Big Creek 3	174.5 MW	CA
Separator (Etiwanda) BESS	112.5 MW	CA

Overview

Overview

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Infrastructure record

Profile

Structured profile

Generation and physical site

Reported operating nameplate by technology

Related assets

Mammoth Pool

Big Creek 3

Pine Flat

Dion R Holm

Kerckhoff 2

Haas

Units and generators

Performance

Peer context

Monthly generation

Grid and market context

Nearby substations

Commercial, land, and environmental record

Land and environmental record