Green Energy Storage Corp. on Aug. 1 secured a three-year preliminary permit from the Federal Energy Regulatory Commission for its proposed Ajo Pumped Storage Project, to be located off-stream near the town of Ajo in Pima County, Arizona.
The 150-MW closed loop pumped storage project would use the 1,200 feet of available head between a new upper reservoir and the existing Ajo open pit mine.
The project would include a new 115-kV transmission line extending about 36 miles from the project’s substation to an existing 115-kV transmission line owned by Arizona Public Service. Portions of the proposed transmission lines will be located on federal lands, including lands managed by the Bureau of Land Management (BLM) and lands that are a part of the Barry M. Goldwater Air Force Range.
The estimated annual average energy production of the project would be 400 gigawatt-hours.
During the course of the permit, the commission expects that the permittee will carry out prefiling consultation and study development leading to the possible development of a license application.