Koontz awarded contract for St. Marys Falls hydropower plant relays, controls

Koontz Electric Co. Inc. has been awarded a $3.1 million contract by the U.S. Army Corps of Engineers to replace protective relays and switchgear/motor control assemblies at the 21.5-MW St. Marys Falls hydropower project.

The Corps’ Detroit District most recently solicited bids in July.

The St. Marys Falls project is one of three Corps hydro projects at Soo Locks, the navigation link between Lake Superior and the lower Great Lakes. The others are the 27-MW Edison Sault Electric project, and the nearby 52-MW Francis H. Clergue project.

The Detroit District awarded a contract in 2013 to Windemuller Electric to supply a step-up transformer at Soo Locks. It took bids in 2010 to reconstruct 300 feet of crib dam at Soo Locks.

The protective relays monitor the current, voltage, frequency and other types of electric power measurement for the purpose of triggering circuit breakers in the event of an abnormal condition. The switchgear/motor control assemblies provide centralized control, protection and distribution of electrical power to auxiliary plant equipment and circuits.

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Michael Harris formerly was Editor for HydroWorld.com.

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