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Central California District
Release Date: 07/05/13
Contacts: David Christy , 916-941-3146 (BLM)  
  Debra Schweizer , 760-873-2427 (Inyo National Forest )  
News Release No. CA-CC-13-63

BLM Announces Availability of Final Environmental Review and Preferred Alternative for Proposed Casa Diablo IV Geothermal Development Project

The Bureau of Land Management today released the Final Environmental Impact Statement/ Environmental Impact Report (Final EIS/EIR) analyzing a proposal to develop geothermal resources near Mammoth Lakes in Mono County and detailing a preferred, environmentally superior alternative plan.

The proposed Casa Diablo IV Geothermal Development Project would be built on the Inyo National Forest and private lands within four existing federal geothermal leases. It would include construction of a new geothermal power plant, up to 16 new production/injection wells, multiple pipelines and an electric transmission line.

The Final EIS/EIR was jointly prepared by the BLM, Inyo National Forest, and Great Basin Unified Air Pollution Control District in compliance with the National Environmental Policy Act (NEPA) and the California Environmental Quality Act (CEQA). It considers a range of alternatives, and responds to comments received on the Draft EIS/EIR that resulted in minor corrections and clarifying text. As a result of this environmental analysis, the agencies have identified alternative 3 as the “preferred” (NEPA) and “environmentally superior” (CEQA) alternative. It differs from the applicant's proposal in pipeline alignments and the location of one well.

The BLM, Inyo National Forest and Great Basin Unified Air Pollution Control District will be issuing separate decisions as described in the Final EIS/EIR.  The BLM and the Inyo National Forest will not issue their final decisions on the proposed project for a minimum of 30 days from today.

Federal Register notices announcing the document’s release were published today and the Final EIS/EIR is available for review at the BLM Bishop Field Office, 351 Pacu Lane, Suite 100, Bishop, CA 93514 and at the Mono County Library, 400 Sierra Park Road, Mammoth Lakes, CA 93546.  Additionally, CD-ROM versions of the Final EIS/EIR may be obtained by contacting the Bishop Field Office.  The document will also be available on the internet at

For more information or to get a copy of the document, contact Collin Reinhardt at (760) 872-5024 or email

The BLM manages more than 245 million acres of public land, the most of any Federal agency. This land, known as the National System of Public Lands, is primarily located in 12 Western states, including Alaska. The BLM also administers 700 million acres of sub-surface mineral estate throughout the nation. The BLM's mission is to sustain the health, diversity, and productivity of America’s public lands for the use and enjoyment of present and future generations. In Fiscal Year 2015, the BLM generated $4.1 billion in receipts from activities occurring on public lands.

Central California District   2800 Cottage Way      Sacramento, CA 95825  

Last updated: 07-03-2013