A History of Looking Forward - Salt River Project

POWER SUPPLY A History of Looking ForwardNatural Gas/Other 9%New plant equipment reduces emissionsHydro and Renewable 4%The installation of major environmental controls, which costnearly $550 million, at two power plants means reducedemissions and improved air quality.Retrofit jobs at Coronado Generating Station (CGS) inSt. Johns and Navajo Generating Station (NGS) near Pagesignificantly reduce nitrous oxide emissions. New systems arebeing added at CGS to further reduce nitrous oxide, mercuryand sulfur dioxide emissions. The coal-fired generating stationstogether supply about 3,000 megawatts of energy day andnight. That’s enough to power 600,000 homes.Nuclear 16%Purchased/Other 22%SRPFuel Mix(by % of totalenergy production)Coal 49%Construction of the new equipment and necessary supportsystems required more than 2.2 million work hours. About700 construction workers — carpenters, electricians,millwrights, welders (below at NGS), pipefitters and others— were employed at the height of construction.SRP has consistently supported reasonable controls on powerplant emissions and has been a leader in adopting newtechnologies and practices to reduce emissions. In the past15 years — while increasing generation output by about 46%— SRP has reduced emissions of nitrogen oxides 18% andsulfur dioxide by about 67% across the generating fleet.A diverse power supply allows SRP to be prepared for thewide variety of costs in the future.Energy from the 575-megawattCoolidge Generating Station, builtby Calgary-based TransCanada,supplies SRP with quick-responsepeak power capacity whileproviding a new resource toback up more renewable energysources, such as wind and solar.6SRP 2011 ANNUAL REPORT