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Economic and dam related articles

Andritz Wins Rewind, Cavitation Repair Contract
for 810-MW Lower Monumental Hydro Plant

by Michael Harris
HydroWorld, July 20, 2015

A $13 million contract as been awarded to Andritz Hydro for generator rewinds
and turbine cavitation repairs at the Lower Monumental dam in SE Washington state.

Lower Monumental Dam in arid Southeastern Washington impounds a reservoir of 28.7 miles in length. The U.S. Army Corps of Engineers has awarded a $12,973,090 contract to Andritz Hydro for generator rewinds and turbine cavitation repairs at the 810-MW Lower Monumental hydroelectric plant in Washington.

The Corps' Walla Walla District most recently sought bids for the work in May.

The Corps said generator Unit 1 experienced a runner hub linkage failure, prompting the Corps to weld blocks to the hub to hold the blades in a fixed position. The work will replace internal hub linkage components requiring disassembly of the main unit and turbine runner, with a provision to inspect and refurbish other turbine and generator components.

Repairs include cavitation repair to Unit 1 blades, hub and discharge ring as well as repair of cavitation damage to the Unit 2 runner. Andritz will supply a new stator winding and stator core.

Lower Monumental is located on the Snake River. The district took bids last year to refurbish thrust bearing shoes at Lower Monumental and 603-MW Ice Harbor dams. The Portland District called for bids by May 15 to install digital governors at Lower Monumental and eight other hydro projects.

For more rehabilitation and upgrade news, visit here.

Related Pages:
U.S. Seeks Firms for Rewind, Cavitation Repair at 810-MW Lower Monumental Dam by Staff,, 4/24/14
U.S. Seeks Boat Barrier for 810-MW Lower Monumental Hydro Project by Staff, Hydroworld, 6/16/15
U.S. Seeks Firms for Turbine Linkage Upgrades at 810-MW Lower Granite Hydro Project by Staff, Hydroworld, 11/7/14
U.S. Seek Firms to Install Governors at 810-MW Little Goose Hydro Project by Staff, Hydroworld, 11/5/14
U.S. Seeks Thrust Bearing Shoe Refurbishment at Lower Monumental, Ice Harbor Dams by Staff, HydroWorld, 6/19/14

Michael Harris
U.S. Seeks Generator Windings Replacement at 402-MW Dworshak Hydro Project
HydroWorld, July 20, 2015

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