Spruce Unit 2

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CPS Energy, which is owned by the City Public Service Board of San Antonio, is operating a 600 megawatt (MW) power plant (Spruce 2) as an addition to its Calaveras Lake based J. K. Spruce Station. The utility boiler burns coal from the Powder River Basin.[1][2] The plant became operational in 2010.[3]

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Problems after commissioning

The Sierra Club reported in October 2010 that CPS Energy "postponed restarting its recently completed Spruce 2 coal-fired power plant, due to problems with the transformer that provides power to nearby substations via high-voltage power lines. The coal plant, which ran at full power all summer, was taken off-line in early September for more detailed inspections of the transformer and other systems. Officials expected to bring the plant back online this month, but it will remain down while the transformer is repaired or replaced."[4]

Project Details

Sponsor: City Public Service Board of San Antonio
Location: Calaveras Lake, TX
Capacity: 600 MW (The plant is registered as 878 MW with the EIA.[5])
Type: Subcritical
Projected in service: 2010
Status: Operating


Citizen Groups



  1. Emissions from Recently Permitted and Proposed Coal Burning Power Plants, Stop the Coal Plant website, August 7, 2007.
  2. CPS City Public Service is Addicted to Coal, SEEC Coalition website, accessed January 2008.
  3. "New Spruce 2 Coal Plant Exceeds Expectations" CPS Energy, accessed November 1, 2011.
  4. "Spruce" Sierra Club, accessed June 23, 2014.
  5. Form EIA-860, US Energy Information Administration, 2012

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