Geysers By The Numbers
The Geysers Locations
- 75 miles north of San Francisco, California
- 10 power plants in Sonoma County: Aidlin, Sonoma, McCabe, Ridgeline, Eagle Rock, Cobb Creek, Sulphur Springs, Lake View, Socrates and Grant
- 3 power plants in Lake County: Big Geysers, Quicksilver and Calistoga.
Calpine Geothermal Operations
- 29,000 acres (45 square miles)
Geothermal Wells
- 322 steam wells
- 54 injection wells
- Deepest well: 12,900 feet, or over two miles
- Average well depth: 8,500 feet
- Total Calpine Geysers wells drilled to date: 591
- Today’s Average Grassroots Drilling Time: 85 days (75 days drilling + 10 rig up/down)
- First Exploratory Well: 1920
- First Modern Well: 1955
- 2017 average steam production per well: 36,036 pounds per hour
- Average Reservoir Steam Temperature: 374 degrees Fahrenheit
- Average Flowing Steam Pressure: 80.7 PSIG
- Most recent steam well drilled: Prati 31, January 2017
- Most recent injection well drilled: CMHC8, May 11, 2017
Facilities
- 13 operating geothermal plants
- Steam pipelines: 80 miles
- Injection water lines: 69 miles
- 21kV power lines: 70 miles
- Project roads: over 167 miles
Water Injection
- Two large-scale wastewater injection projects provide an average 15.09 million gallons daily (MGD)
- Santa Rosa Geysers Recharge Project Average: 11.69 MGD
- Calpine Southeast Geysers Effluent Pipeline Average: 3.4 MGD
- Calpine + Northern California Power Agency: 7.00 MGD
Power Generation
- First commercial power plant: Unit 1, Startup - September 1960
- Most recent plant built: Aidlin, 1989
- 2017 Average Load: 647.7 net megawatts
- 2017 Generation: 5,673,647 net megawatt hours
- 2017 Average Unit Availability: 94%
Visit The Geysers
Visit the Calpine Geothermal Visitors Center in Middletown, California, Wednesdays through Saturdays from 11:30 a.m. to 5 p.m. (admission is free).
Sign up for a free geothermal power plant tour led by an experienced Calpine team member. View the schedule and register for a tour by visiting www.geysers.com or call 1-866-GEYSERS or 707-987-4270 for more information.