CX-004530: Categorical Exclusion Determination

Bald Mountain Low-Temperature Geothermal ProjectCX(s) Applied: A9, B3.1Date: 11/24/2010Location(s): CaliforniaOffice(s): Energy Efficiency and Renewable Energy, Golden Field Office

Office of NEPA Policy and Compliance

November 24, 2010
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Bald Mountain Low-Temperature Geothermal Project
CX(s) Applied: A9, B3.1
Date: 11/24/2010
Location(s): California
Office(s): Energy Efficiency and Renewable Energy, Golden Field Office

Oski Energy LLC would use U.S. Department of Energy grant funds to validate the theoretical as well as actual performance advantages of an advanced ammonia-water mixed fluid cycle (Project Cycle) over the current state-of-the-art Organic Rankine Cycle (ORC) for both on and off design point operating conditions in low temperature geothermal resource applications, validate that the Project Cycle offers significant economic benefits over ORC for similar project net output generation levels, prove that ammonia-water mixed fluid cycle projects offer similar or superior operational performance to ORC projects in terms of project capacity, availability, and operational overhead inclusive of safety, ease of use, and efficiency.

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