Query
Mammoth Pool
Type
Entity Briefing
Entity
Mammoth Pool
ISO/RTO
spp
Generated
2026-10-18T05:54:23.296Z

Briefing on Mammoth Pool

Entity Briefing
Generated Oct 18, 2026·Dataset freshness not reported
190 MW
Capacity
Operating
Current status
1960
Operating since
2
Generators
27.9%
Capacity factor
466 GWh
Annual generation
Briefing/plantOperating

Mammoth Pool is a 190 MW Conventional Hydroelectric asset in CAISO (California), currently Operating.

Mammoth Pool is reported in California since 1960 under Edison International. Available operating and financial measures include 27.9% capacity factor and 466 GWh annual generation; $411/kW reported CapEx.

Location
Madera, California
Technology
Conventional Hydroelectric
Owner / parent
Edison International
Operator
Southern California Edison Co
Grid
CAISO (California)
Plant ID
344

What stands out

1

Mammoth Pool is a 190 MW Conventional Hydroelectric asset in California with status Operating.

2

Latest annual operating measures report 27.9% capacity factor and 466 GWh annual generation.

3

Available financial measures include $12.9/MWh OpEx, $411/kW CapEx.

4

Latest linked story: “Creek Fire reaches Mammoth Pool Reservoir; military helicopters rescue over 150 people” (Wildfire Today, 2020-09-06).

Market and operating context

ISO / market
CAISO (California)
Balancing authority
California Independent System Operator
NERC region
WECC
State rank
#15 of 247
National rank
#100 of 1,462

Why it matters

For this asset in CAISO (California), operating status, generation, ownership, and linked events are the primary facts for performance and asset-level diligence. The exact chart and source-linked records below let the reader test those facts before moving to a deeper report.