Commission advances Hydra Store's plan to add ~150 acres to Boulder City's Land Management Process for compressed-air storage project

The Boulder City Planning Commission on Feb. 19 voted to add approximately 150 acres east of Interstate 11 to the city's Land Management Process (LMP) list for consideration as a lease site for a Hydra Store compressed-air energy storage facility.

City planner Sonisha Lion framed the item as an initial step: LMP listing does not grant a lease or construction permit but is the administrative action that allows a parcel to be considered for future lease and development. Hydra Store representatives presented company background, financing partners (presenters named Goldman Sachs and a Canadian pension fund), and project parameters: a proposed ~500-megawatt facility with eight-hour duration, a final operating footprint of roughly 100 acres plus about 50 acres for staging and construction, and a target 50+ year asset life.

Hydra Store speakers (Linda Bolan, Dean Tul and Julie Thompson) described the proposed technology as a hard-rock compressed-air energy storage system with a shaft down roughly 2,000 feet to a cavern that stores compressed air and reuses recovered heat for generation via air turbines. Presenters said the technology uses established components and that the company has operating examples in other jurisdictions; they described projected construction-level employment (~650 jobs), permanent staffing of 25–40 and an estimated $6 million per year in wages once operational. Hydra Store said it moved the parcel selection to avoid OHV trail conflicts and pledged local engagement, surveys and staged geotechnical testing including aeromagnetic studies, bore holes and pressure testing before excavation.

Speakers and residents raised common concerns: noise (company estimated 50–60 dB at the fence line during operations, subject to code limits and mitigation), water and excavation disposal plans for rock removed during shaft/cavern construction (company said some rock could be used for on-site reservoirs and community uses, with additional off-takers possible), seismic and geology risk (company described staged testing and monitoring and said pressure testing would precede cavern excavation), and where the generated power would be delivered (Hydra Store described utility tolling arrangements and that power would be dispatched under contract to off-takers rather than being directly wired into individual homes).

Public comment included supportive remarks from the Boulder City Chamber of Commerce and a local land surveyor who testified Hydra Store engaged with the OHV community. Other residents asked whether the facility's operational economics mean it will consume more energy than it produces (a point discussed by a resident and acknowledged in concept by speakers, who said the business model relies on charging during low-price periods and discharging at higher prices), and requested detail on financing and permitting schedules.

After questions and public comment, a commissioner moved to approve Resolution No. 1268 to place the identified parcel on the LMP list; the motion carried on the record. Staff emphasized that zoning and master-plan amendments and numerous federal, state and local permits would be required before any lease or construction and that public engagement and environmental review would follow.

Next steps: listing the land on the Land Management Process list allows staff and the applicant to proceed with required engineering studies, environmental reviews and, if pursued, subsequent zoning and master-plan amendment processes and lease negotiations. Hydra Store and city staff said further community meetings and technical studies (bore holes, seismic surveys, utility interconnection studies) will be scheduled.