The Bureau of Reclamation has awarded a $1.847 million contract to Precision Machine &Supply Inc. of Lewiston, Idaho, to refurbish pressure regulating valves at 2,078-MW Hoover Dam in Arizona and Nevada.
BuRec’s Lower Colorado Regional Office said Sept. 14 that Precision Machine &Supply is to disassemble, remove, rebuild, and re-install two of the valves between this October and the first half of 2007. The contract also provides options for the overhaul of five more valves in future years.
The valves are part of original turbine equipment in Hoover Dam power plant, on the Colorado River about 30 miles southeast of Las Vegas, Nev. When flow to the turbines must be stopped quickly, the valves divert water around the turbines and directly into the river. That reduces the pressure increase that otherwise would occur in the penstocks, protecting the life of the penstocks.
Acting BuRec Commissioner Bill Rinne said the work would help restore the valves to original operating performance, allowing them to function reliably for another 30 years. Power customers will fund the rehabilitation work, as is the case for all operations and maintenance at Hoover Dam.
Earlier this year, BuRec awarded a $195,648 contract to Precision Machine &Supply to study maximizing capacity and performance of seven Hoover Dam units -ï¿½ three units on the project’s Arizona side and four in Nevada. (HNN 3/28/06)