- Docket Number
- 79-AFC-02C
- Capacity
- 110 MW
- Location
- Sonoma County
- Technology
- Steam Turbine
- Project Status
- Operational (Geothermal)
- Project Type
- Application for Certification
Northern California Power Agency (NCPA) Geothermal Plant No. 1 (NCPA-1) is located in located on a federal land approximately 60 miles northwest of Sacramento on the Sonoma County side of the Mayacmas Mountain ridgeline above the Big Sulphur Creek and Bear Canyon Creek drainages, just west of the Sonoma/Lake County line. The project is located in an unincorporated area of Sonoma County near the town of Anderson Springs where the geothermal steam wells are located.
NCPA-2 is a 110-megawatt generating geothermal facility consisting of steam wells, steam gathering system and reinjection wells of the steam supplier, a power plant and transmission tapline. NCPA-1 includes two 55 MW steam turbine-generator units, each capable of operating separately, if necessary, during scheduled or unscheduled shutdowns. Each turbine-generator has its own condensing system, cooling tower and electrical sub-station to step-up the voltage for transmission. The primary H2S abatement system uses a surface condenser to partition the spent steam, into condensate and non-condensable gases and solids that are treated by the Stretford System, which then scrubs heat from the H2S from the vent gas stream from the condenser and catalytically oxidizes the gas to eliminate Sulfur.
On June 1, 2020, the California Energy Commission staff approved the modernization of fire protection system for the purpose of replacing the degraded existing system and defective control panels. The recommissioning of the upgraded fire protection system is currently underway.
- Replacement of Existing Hydrogen Peroxide Tank
Staff Approval
TN 206721
11/20/2015 - Termination of MOU Between the Energy Commission and the United States Geological Survey and Amendment of the Final Decision
Commission Approval
Order No. 10-0505-f
TN 56611
05/11/2010 - Modification of Air Quality Determination of Compliance Condition No. 1
Commission Approval
Order No. 89-0118-01a
Not in Docket
01/18/1989
Attention: You will need to look up the transaction number (TN) in the Compliance Docket Log. Non-hypertext items in the docket indicate that no electronic or hard copy is available or the item was filed confidentially. If you have any questions, please contact the Compliance Project Manager assigned to this project.
Power Plant Certification and Exemption Processes
The CEC has the exclusive authority to certify all thermal power plants 50 megawatts (MW) and larger and related facilities proposed for construction in California. The Application for Certification (AFC) process is a certified regulatory program under the California Environmental Quality Act (CEQA). As a certified regulatory program, the CEC does not prepare environmental impact reports (EIRs) in an AFC proceeding, but instead prepares environmental assessment documents that are functionally equivalent to EIRs. A certificate issued by the CEC is in lieu of any permit, certificate, or similar document otherwise required by any state, local or regional agency, or federal agency to the extent permitted by federal law, and supersedes any applicable statute, ordinance, or regulation of any state, local, or regional agency, or federal agency to the extent permitted by federal law.
Original Proceeding
e-Commenting has been closed. Please submit your comments in compliance proceeding above.
Contacts
Project Manager
Anwar Ali
CME@energy.ca.gov
(Please enter project name in the email subject line)
(916) 698-7498
Public Participation Questions
Public Advisor
Contact the Public Advisor
916-269-9595
Media Inquiries
Media & Public Communications Office
mediaoffice@energy.ca.gov
916-654-4989