On January 31, 1999, CalEnergy Operating Corp. (CalEnergy) unveiled a $400 million expansion of their geothermal power complex on the shores of the Salton Sea in southern California’s Imperial Valley. The new construction includes nearly 60 megawatts (MW) of new geothermal electrical capacity, and a unique project to “mine” commercialgrade zinc from geothermal brine produced for power generation. CalEnergy is a subsidiary of Mid-American Energy Holdings Co. (Des Moines, IA)