The Geysers

GEYSERS BY THE NUMBERS

The Geysers Geothermal Field 2016 Statistics

The Geysers - 15 Power Plants

  • 75 miles north of San Francisco, California
  • 12 power plants in Sonoma County (10 Calpine, 2 Northern California Power Agency)
  • 3 power plants in Lake County

Calpine Geothermal Operations

  • 29,000 acres (45 square miles)

Geothermal Wells

  • 327 steam wells
  • 52 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‚Äôs Average Grassroots Drilling Time: 85 days (75 days drilling + 10 rig up/down)
  • First Exploratory Well: 1920
  • First Modern Well: 1955
  • 2016 average steam production per well: 36,795 pounds per hour
  • Average Reservoir Steam Temperature: 375.4 degrees Fahrenheit
  • Average Flowing Steam Pressure: 80.7 PSIG
  • Most recent steam well drilled: Prati 31, January 2017
  • Most recent injection well drilled: LF-50, August, 2016

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 approximately 11.91 million gallons daily (MGD)
    - Santa Rosa Geysers Recharge Project Average: 10.70 MGD
    - Calpine Southeast Geysers Effluent Pipeline Average: 1.21 MGD
    - Calpine + Northern California Power Agency: 5.33 MGD

Power Generation

  • First commercial power plant: Unit 1, Startup - September 1960
  • Most recent plant built: Aidlin, 1989
  • 2016 Average Load: 634.1 net megawatts
  • 2016 Generation: 5,554,387 net megawatt hours
  • 2016 Average Unit Availability: 90.0%

Visit The Geysers

  • Visit: The Calpine Geothermal Visitors Center in Middletown, California, Wednesdays through Saturdays from 11 a.m. to 5 p.m. (admission is free)
  • Tour: Sign up for a free geothermal power plant tour led by an experienced Calpine team member. View the schedule or register for a tour by visiting www.geysers.com or calling 1-866-GEYSERS or 707-987-4270.