What is the latest status of the project “Willow Rock Advanced-CAES Facility”?

The status recorded for “Willow Rock Advanced-CAES Facility” is in planning/approval.

Where can I verify the source and access all details for “Willow Rock Advanced-CAES Facility”?

This Taiyo project page references POWER Magazine along with the original URL (https://www.powermag.com/finding-a-longer-duration-alternative-to-battery-storage/). Taiyo standardizes official data into a consistent, searchable project profile.

Willow Rock Advanced-CAES Facility

Sector: Power Generation (CCGT) • Location: Rosamond, California, United States

Source: POWER Magazine

Project

In Planning/Approval

An Advanced Compressed Air Energy Storage (Advanced-CAES) facility planned by Canadian company Hydrostor in Rosamond, California. It will provide 500 MW of power using compressed air stored in an underground cavern and water displacement to generate power without a gas turbine.

Status: Prospective
Sector: Power Generation (CCGT), Water Supply and Storage, Wind, Energy Storage
Location: Rosamond, California, United States of America
Updated: 22 Jul 2026
Source: POWER Magazine

ConstructChat

Ask ConstructChat about Willow Rock Advanced-CAES Facility

Pick a question to edit it, or write your own.

First answer free · no account

I am a

Project Information

3 Q

The project “Willow Rock Advanced-CAES Facility” is an infrastructure initiative in the Power Generation (CCGT) sector, located in Rosamond, California, United States. Taiyo aggregates data on it from POWER Magazine.

Participants

Not available for this record.

Status

Original status	in planning/approval
Taiyo status	Prospective
Taiyo last update	2026-07-22

Contact

Not available for this record.

Description

Description	An Advanced Compressed Air Energy Storage (Advanced-CAES) facility planned by Canadian company Hydrostor in Rosamond, California. It will provide 500 MW of power using compressed air stored in an underground cavern and water displacement to generate power without a gas turbine.
Original sector	Energy Storage

Location

Country	United States of America (USA)
State	California
City	Rosamond

Source

Source	POWER Magazine
URL

More Details

Record type	Project
Sector	Power Generation (CCGT), Water Supply and Storage, Wind, Energy Storage
Article published date	2025-12-04

Research

Free account

View all details

You are reading the public part. A free account opens the rest:

Every detail on this project
News and media coverage
Technical research

View all details

Free account · no card · lands you back on this project

Willow Rock Advanced-CAES Facility

Ask ConstructChat about Willow Rock Advanced-CAES Facility

Project Information FAQ

Project Information

Research

View all details

More Power Generation (CCGT) projects in United States