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| Re-Powering of the Lee A. Tregurtha Steam flowed through the Steamer Lee A. Tregurtha's 1942-vintage steam turbines for the last time when she arrived for layup at Bay Shipbuilding in Sturgeon Bay, Wisconsin, on January 9, 2006. Removal of her steam plant and associated machinery began almost immediately. The project to repower the Lee Tregurtha with a modern, efficient, extensively automated, heavy fuel diesel propulsion plant and auxiliaries is now complete. The life-extending project left the vessel's displacement unchanged while improving cargo carrying capacity slightly. She has increased maneuverability, enhanced by her new controllable pitch propeller system with direct pilot house control. The Motor Vessel Lee A. Tregurtha returned to commercial service on September 29, 2006, when she left Sturgeon Bay for Escanaba, MI, where she loaded taconite for delivery to Indiana Harbor, IN. To minimize the ship's down-time, the repowering project made significant use of prefabricated, fully-outfitted equipment modules; fabrication started early in fall 2005. "This is an exciting project and it places a focus on our long-term commitment to this fleet and the industries which it serves," said Mark Barker, Interlake treasurer and vice president. M/V Lee A. Tregurtha is powered by two Bergen Rolls-Royce heavy fuel, Model B32:40 L6P diesel engines of 8040 total horsepower at 740 rpm rated speed. Bergen also supplied one heavy fuel Model KRG-5 auxiliary diesel generator set, rated 750 kw at 720 rpm, and one 750 kw shaft driven generator, driven on the starboard main engine via a reduction gear PTO. The new Renk main reduction gear is twin input, single output, 750 to 114 rpm reduction with the power take off for the shaft generator. The Lee Tregurtha's new propeller is a KaMeWa controllable pitch propeller system with five 17-foot diameter blades, designed for enhanced performance and durability, and fabricated to ABS grade 1B ice service rating. |
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