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50 Years of Development at The Geysers
The Fifth Decade - 2000s

Map of the Geysers Geothermal Field © Geysers Geothermal Assn. 2010

Commercial Development at The Geysers from 2000-2009

2000 The Geysers celebrates 40 years in operation with some 350 steam wells and 80 miles of pipeline.

2003 Santa Rosa Recharge Project starts up. Project delivers 11 millions per day pf tertiary treated reclaimed water from the City of Santa Rosa to injection wells at The Geysers.

2005 - 2007 U.S. Renewable Group (USRG) takes ownership of Bottle Rock facility, formerly Department of Water Resources (DWR), which was shut down in 1991.

2006-2007 Riverstone Holdings and the Carlyle Group acquire a significant stake in Bottle Rock. Plant is refurbished and repowered.

2006-2008 Western GeoPower acquires Unit 15 steamfield and drills four new wells.

late 2000s Calpine reopens CCPA area and explores Wildhorse area of The Geysers.

Technical Advances and Legislation at The Geysers 2000 - 2009

2000 Calpine breaks ground for Visitors Center. In May 2001 Calpine Visitor's Center opens.


NCPA initiates near-horizontal drilling at The Geysers with injection well N-7.

2008 NCPA first installed the first of two 1MW solar array systems to power the large pump station at the Clear Lake Treatment Plant.


NCPA initiates downhole turbine pilot.

250 kW of new capacity is added to the system.

Map of the Current Geysers Geothermal Field

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Geysers Geothermal Association Website (Updated April 18, 2011)
All rights reserved. © 2011 Dorothy Beebee