EnergyX–Compass Minerals Utah lithium plant: project and capex lens for mine planners
Reviewed by Tom Sullivan

First reported on MINING.com
30 Second Briefing
EnergyX has signed an MoU with Compass Minerals to build a 30,000 tpa direct lithium extraction and refining plant at Compass’s existing Ogden brine operation near Utah’s Great Salt Lake, using an established brine stream and returning processed brine to the current sulphate of potash and magnesium chloride system. Compass has already invested an estimated $70–80 million in lithium-related equipment, cutting upstream drilling and CapEx risk and potentially simplifying permitting. EnergyX is targeting a 2028 construction start and plans to produce lithium carbonate on-site without additional Great Salt Lake water withdrawals.
Technical Brief
- EnergyX will design, fund, construct and operate the DLE and refining facility on Compass-owned land.
- Project Powderhound is EnergyX’s third lithium project and its second located in the United States.
- Compass’s Ogden site already runs large-scale sulphate of potash and magnesium chloride plants, providing shared infrastructure.
- Compass previously spent an estimated US$70–80 million on lithium-related equipment before pausing its own lithium plans.
- Existing surface brine streams eliminate upstream drilling, exploration and associated CapEx, improving unit cost assumptions.
- Processed brine will be reintegrated into Compass’s current production circuit, minimising flow-sheet disruption and permitting complexity.
- EnergyX intends to use a lithium carbonate flowsheet aligned with its Chilean Project Black Giant technology platform.
Our Take
EnergyX’s Utah work with Compass Minerals comes on the back of its Project Lonestar DLE plant in Texas, so operators around the Great Salt Lake can benchmark performance against a US brine system already running at commercial demonstration scale.
Compass Minerals’ prior spend of roughly $70–80 million on lithium equipment suggests the Utah asset is already partially de-risked on the process side, making it an attractive proving ground for EnergyX membranes that were recently scaled up at its Austin roll-to-roll facility.
Lithium appears frequently alongside other critical minerals in our database, but this Utah-focused piece stands out because it links battery-grade lithium carbonate to an existing sulfate of potash and magnesium chloride brine operation, signalling potential for multi-commodity revenue streams from the same evaporation footprint.
Prepared by collating external sources, AI-assisted tools, and Geomechanics.io’s proprietary mining database, then reviewed for technical accuracy & edited by our geotechnical team.
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