Interconnection queue › California › Geothermal

Geothermal Projects in the California Interconnection Queue

Snapshot of 2026-09-07 · 16 projects

16 geothermal projects are in the interconnection queue with a California location, totaling 1,457 MW across the 16 that publish a capacity.

Grouped from the ISOs' own fuel codes (see the mapping). Codes we could not match to a published definition are left unclassified rather than assigned here.

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By ISO

ISO	Projects	Capacity
CAISO	16	1,457 MW

By status, as published

Status	Projects
WITHDRAWN	14
ACTIVE	2

Top counties

County	Projects	Capacity
SONOMA	6	286 MW
INYO	5	215 MW
LAKE	2	102 MW
CHURCHILL/PERSHING	1	364 MW
IMPERIAL	1	470 MW
LASSEN	1	20 MW

Largest projects with published capacity

The 12 highest-capacity rows in this page's exact scope, ordered by the capacity the ISO published. Projects without a published capacity are not ranked here and remain included in the totals above.

Project	ISO	County	MW	Status	Queue date	Proposed operation
BLACK ROCK 1,2,3,4, & 5,6 ID 677	CAISO	IMPERIAL	470	WITHDRAWN	2011-03-31	not published
TGP NNP ID 643AR	CAISO	CHURCHILL/PERSHING	364	WITHDRAWN	2010-07-31	not published
COSO 2 SWAP (COSO FINANCE PARTNERS) ID 643AD	CAISO	INYO	95	WITHDRAWN	2010-07-31	not published
NAVY 1 ID 140	CAISO	INYO	75	WITHDRAWN	2006-10-31	not published
GEYSERS UNIT 11 RECONNECTION ID 1104	CAISO	SONOMA	74	WITHDRAWN	2015-04-30	not published
MAYACAMAS GEOTHERMAL ID 1859	CAISO	SONOMA	53	ACTIVE	2021-04-15	not published
BOTTLE ROCK POWER ID 81	CAISO	LAKE	52	ACTIVE	2005-09-13	not published
NEW GEYSERS ID 187	CAISO	SONOMA	50	WITHDRAWN	2007-03-14	not published
BINKLEY POWER PROJECT ID 441	CAISO	LAKE	50	WITHDRAWN	2008-05-30	not published
CPN WILD HORSE GEOTHERMAL ID 586	CAISO	SONOMA	42	WITHDRAWN	2010-02-01	not published
WGP GEYSERS ID 1221	CAISO	SONOMA	35	WITHDRAWN	2015-02-23	not published
WESTERN GEOPOWER UNIT 1 ID 184	CAISO	SONOMA	32	WITHDRAWN	2007-03-05	not published

Where each number came from

ISO	We last read	Source last changed	Source
CAISO	2026-09-07	2026-09-07 (changed this snapshot)	source file

This week's changes · How this is collected

Compiled from each ISO's own published interconnection queue report. Queue position is not a permit, a contract, or a guarantee that a project will be built; most projects in every queue are eventually withdrawn. Figures are reproduced as published, are provided for informational purposes only, and carry no warranty of accuracy or completeness. Always verify against the ISO's own report before relying on any figure.