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Eight Cat Marine Engines Re-power US Army Dredge

Posted on May 18, 2009

The US Army Corps of Engineers operates two hopper dredges on the west coast of the US to keep shipping channels open. The largest and most modern of them is the Essayons, built by Bath Iron works in Bath, Maine in 1982. Its aging power plant has been replaced by eight Cat marine engines totalling more than 15 000 kW.

After 25 years in service, the main engines were showing their age plus they did not meet the latest air-quality standards for California harbors. US Congress approved the funds to re-power the ship and install a new power distribution system. The new line-up consists of 4 Cat C280-12 main engines, 3 Cat 3512C gen sets and 1 Cat C18 emergency gen set, with all meeting EPA Tier 2 emissions standards.

All generators are controlled by an automated power management system. Engine functions, temperatures and pressures are monitored and displayed on ten computer stations mounted in various locations on the bridge, the engine room and inthe fire-fighting station.

The re-powering project was managed by Cascade General at the Portland Shipyard. Essayons is just one example of many dredges worldwide counting on Cat and MaK marine power to keep ports and shipping channels open.

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