The US Bureau of Reclamation has awarded Andritz Hydro a $6.82 million contract to modernise and overhaul the last three original pressure relief valves at Hoover Dam.

Beginning in October 2017, construction crews monitored by USBR’s Lower Colorado Region will begin the process of disassembling the first of the three remaining pressure relief valves at Hoover Dam and refurbishing the units with new valves and related componentry – which will include installation of new valve head covers and hydraulic actuators.

Conversion and overhaul of the existing valves at Hoover Dam with installation of the new componentry is expected to be completed over the next three years when maintenance schedules allow. The rehabilitation work, like all operations and maintenance work at Hoover Dam, is funded by the dam's power customers.

"Ensuring the safety and reliability of Reclamation dams to protect the downstream public is a top priority for Reclamation," Commissioner Estevan López said today. "The new pressure relief valves will help to protect the life of the dam’s four penstocks.”