U.S. awards generator rehab contract at 6,809-MW Grand Coulee

The Bureau of Reclamation has awarded a $4.7 million contract for a stator core and winding for Pump Unit P3 at 6,809-MW Grand Coulee Dam, on the Columbia River in Washington.

BuRec awarded the contract to Alstom Hydro US Inc. of Littleton, Colo., on Aug. 22. The contract also includes disassembly of the pump motor; removing and disposing of an armature winding and stator; and furnishing, installing, and testing the new armature winding and stator core.

BuRec Commissioner Bob Johnson said the work is essential to ensure safe and continued operation of Grand Coulee, the largest hydroelectric plant in North America. BuRec awarded a contract in July to repair cavitation damage to the first of six turbine runners at Grand Coulee’s Third Power Plant. (HNN 7/25/08)

In April, the bureau took comments and qualifications for a plan to overhaul three generating units in the Third Power Plant. (HNN 4/8/08) That work could include overhauling generator thrust and guide bearings and turbine components such as wicket gates, operating rings, linkage arms, and wicket gate bushings, and furnishing and installing new mechanical seals.

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