The Truckhaven Geothermal Leasing Area Final Environmental Impact Statement (FEIS) was prepared to analyze and disclose the potential environmental impacts on the natural and human environment that could result from the proposed leasing of Federal geothermal resources. The EIS considered approximately 14,731 acres of Bureau of Land Management (BLM)-managed public lands in the area known as the Truckhaven Geothermal Leasing Area, located in western Imperial County, California (Figure 1-1). The minerals, including the geothermal resources, are managed by the BLM El Centro Field Office.