STATISTICS

Geysers by the Numbers

February 2014

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 •29,000acres(45squaremiles)

Geothermal Wells •333steamwells •60injectionwells •Deepestwell:12,900feet,orovertwomiles •Averagewelldepth:8,500feet •TotalCalpineGeyserswellsdrilledtodate:587 •Today’sAverageGrassrootsDrillingTime:85days (75daysdrilling+10rigup/down) •FirstExploratoryWell:1920 •FirstModernWell:1955 •2013AverageSteamProductionperwell: 36,690poundsperhour •AverageReservoirSteamTemperature:359degreesFarhenheit •AverageFlowingSteamPressure:76.6PSIG •Mostrecentsteamwelldrilled:Aidlin10,January13,2014 •Mostrecentinjectionwelldrilled:LF22,August27,2013

Facilities • 15 operating geothermal plants •Steampipelines:80miles •Injectionwaterlines:69miles •21kVpowerlines:70miles •Projectroads:over167miles

Water Injection •Twolarge-scalewastewaterinjectionprojectsprovideapproximately 15.61milliongallonsdaily(MGD) -SantaRosaGeysersRechargeProjectAverage:11.73MGD -CalpineSoutheastGeysersEffluentPipelineAverage:3.88MGD -Calpine+NorthernCaliforniaPowerAgency:8.39MGD

Power Generation •Firstcommercialpowerplant:Unit1,Startup-September1960 •Mostrecentplantbuilt:Aidlin,1989 •2013AverageOutput:685.2netmegawatts •2013Generation:6,002,660netmegawatthours •2013AverageUnitAvailability:96%

Visit The Geysers •Visit:TheCalpineGeothermalVisitorsCenterinMiddletown, California,WednesdaysthroughSaturdaysfrom11a.m.to5p.m. (admissionisfree) •Tour: Sign up for a free geothermal power plant tour led by an experiencedCalpineteammemberbyvisitingwww.geysers.comorcalling1-866-GEYSERSor707-987-4270.

Calpine at The Geysers Calpine Corporation generates more electricity than any other independent power producer inAmerica,withafleetof94power plants in operation or under construction, representing morethan29,000megawattsofgenerationcapacity.Servingcustomersin20statesandCanada, we specialize in developing, constructing, owning andoperatingnaturalgas-firedand renewable geothermal power plants that use advanced technologies to generate powerinalow-carbonandenvironmentally responsible manner.Ourclean,efficient,modernandflexiblefleetisuniquelypositionedtobenefitfrom the secular trends affecting ourindustry.Pleasevisitwww.calpine.comtolearnmoreaboutwhy Calpine is a generation ahead–today.

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