February 2003

(Tonopah, Fla.)–Zachry's Plant Civil Services (PCS) has completed construction of two evaporation ponds at Sempra Energy Resources' Mesquite Power Generating Station, in Arizona's southwestern desert. Work began on the evaporation ponds in June 2002. The ponds process large amounts of water to generate the power plant's electricity.

At about 70 acres each, the ponds are two of the largest that PCS has ever built. During construction of the east pond, PCS excavated about 700,000 cubic yards of dirt and compacted 340,000 cubic yards of embankment. The west pond required the excavation of 600,000 cubic yards of dirt, the compacting of 190,000 cubic yards of embankment and the relocation of 70,000 cubic yards of dirt.

Once completed, the Mesquite Power Generating Station will be one of the nation's cleanest and most efficient natural gas-fueled power plants. The 1,250-Mw facility will be 45 percent more efficient than a typical natural gas-fueled power plant and will feature the latest in air emissions control technology. The plant will generate enough electricity to power 350,000 homes.

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