Boise, Idaho-based U.S. Geothermal Inc. announced on Aug. 30 that it has signed a contract with Science Applications International Corp. (SAIC), McLean, Va., for engineering, procurement and construction for the first phase of a new geothermal powerplant at San Emidio in northwest Nevada. The design-build work will be done by a subsidiary of the Benham Cos. LLC, a unit of SAIC. The first phase of the project, set to cost $27 million and be completed by the end of 2011, will generate between 8 MW and 9 MW of power. A second phase, to cost $170 million, will add an
Arch dams, classically curved monoliths situated in narrow valleys, are not as common as other types of dams, such as embankment dams and gravity dams. ENR takes a look at some of the biggest arch dams in the world, both completed and under construction.