The Geysers

GEYSERS BY THE NUMBERS

The Geysers Geothermal Field 2013 Statistics

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
  • 5 power plants in Lake County: Bear Canyon, West Ford Flat, Big Geysers, Quicksilver and Calistoga.

Calpine Geothermal Operations

  • 29,000 acres (45 square miles)

Geothermal Wells

  • 333 steam wells
  • 60 injection wells
  • Deepest well: 12,900 feet, or over two miles
  • Average well depth: 8,500 feet
  • Total Calpine Geysers wells drilled to date: 587
  • Today‚Äôs Average Grassroots Drilling Time: 85 days (75 days drilling + 10 rig up/down)
  • First Exploratory Well: 1920
  • First Modern Well: 1955
  • 2013 Average Steam Production per well: 36,690 pounds per hour
  • Average Reservoir Steam Temperature: 359 degrees Fahrenheit
  • Average Flowing Steam Pressure: 76.6 PSIG
  • Most recent steam well drilled: Aidlin 10, January 13, 2014
  • Most recent injection well drilled: LF22 August 27, 2013

Facilities

  • 15 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 15.61 million gallons daily (MGD)
    - Santa Rosa Geysers Recharge Project Average: 11.73 MGD
    - Calpine Southeast Geysers Effluent Pipeline Average: 3.88 MGD
    - Calpine + Northern California Power Agency: 8.39 MGD

Power Generation

  • First commercial power plant: Unit 1, Startup - September 1960
  • Most recent plant built: Aidlin, 1989
  • 2013 Average Load: 685.2 net megawatts
  • 2013 Generation: 6,002,660 net megawatt hours
  • 2013 Average Unit Availability: 96.0%

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.