Geysers By The Numbers

 

 2022 Statistics

 

The Geysers Locations

  • 75 miles north of San Francisco, California
  • 13 Operating Geothermal Power Plants
  • 10 Power Plants in Sonoma County; 3 Power Plants in Lake County

 

Calpine Geothermal Operations

  • 28,447 acres (44 square miles) 

 

Geothermal Wells

 

  • 319 steam wells
  • 73 injection wells
  • Deepest well: 12,900 feet, or over two miles
  • Average well depth: 8,500 feet
  • Total Calpine Geysers wells drilled to date: 601
  • Today’s Average Grassroots Drilling Time: 85 days (75 days drilling + 10 rig up/down)
  • First Exploratory Well: 1920
  • First Modern Well: 1955
  • 2022 average steam production per well: 11,938 pounds per hour
  • Average Reservoir Steam Temperature: 370.9 degrees Fahrenheit
  • Average Flowing Steam Pressure: 83.2 PSIG
  • Most recent steam well drilled: Prati 24 on February 11, 2021
  • Most recent injection well drilled: Davies Estate 11 completed on November 10, 2022

 

Facilities

 

  • 13 operating geothermal plants
  • Steam pipelines: 92.2 miles
  • Injection water lines: 72 miles
  • 21kV power lines: 75 miles
  • Project roads: over 171 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
  • 2022 Average Load: 630.94 net megawatts
  • 2022 Generation: 5,543,878.10 net megawatt hours
  • 2022 Average Unit Availability: 91.17%

 

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.