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NEPA Document Collection for: DOI-BLM-CA-670-2010-107
CX at North Brawley Geothermal Area for Geothermal/Well Field,

CX for Drilling Permit for Production Well 78A-6 at North Brawley Geothermal Area

General NEPA Document Info
Energy Sector Geothermal energy

Analysis Type



Ormat Nevada, Inc.
Consultant NA

Geothermal Area

North Brawley Geothermal Area

Project Location


Project Phase

Geothermal/Well Field


Production Wells
Comments Geothermal Drilling Permit Production Well 78A-6
Time Frame (days)
Application Time 525
Participating Agencies

Lead Agency


Funding Agency

none provided

Managing District Office

BLM California Desert District Office

Managing Field Office

Funding Agencies

none provided

Surface Manager


Mineral Manager

Selected Dates
Application Date 2008/12/17
Document Type
Decision Document Date 2010/05/26
Relevant Numbers
Lead Agency
Doc Number
Serial Number GDP-670-10-1
Lease Numbers

CX Authorization

Proposed Action

Ormat proposes to re-drill a new hole at well 78A-6, This hole will be drilled from its current depth of about 8500 to approximately 10000 feet The well will then be tested to determine reservoir characteristics, after which temperature profile of the well will be measured. Finally, Well 78A-6 will be utilized to generate electrical power.

The hole will be drilled with a normal rotary drilling rig. The rig will be equipped with diesel engines, storage tanks, mud pumps, and other typical auxiliary equipment During drilling, the top of the derrick will be approximately 176 ft above ground level. The hole will be drilled using a gel-based mud or gel and polymer drilling fluid to circulate the rock cuttings to the surface where they are removed. The mud will then be circulated. The cuttings will be captured in the containment basin and will subsequently be tested and transported to an approved landfill for disposal.

Approximately 9 to 18 workers will be on location at any given time. The drilling crews will not be living on location.

Data Completion Notes

5/12/2014 - Assigned this CX to the North Brawley Geothermal Area (could also be the Salton Sea Geothermal Area, both fields lie within Imperial Valley. We will need to check the individual well field information for both areas to find this particular well). MB

8/26/2013 - Need lease number, geothermal area (Imperial valley, aded to drop down list?) and GDP application date KW

8/26/2013 - When RMP field is added, add "California Desert Conservation Area (CDCA) 1980 and San Diego County Resource Management Plan (2009)"



Categorical Exclusion Approval: