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72 MN November 2010 Washburn & Doughty Associates, Inc. delivered the Mary Ann Moran, a 121-ft by 36-ft by 18-ft Intercon Tug, to Moran Towing Corporation. Designed by Ocean Tug & Barge Engineering Corp., Mary Ann Moran is the fourth vessel built by Washburn & Doughty to this design and deliv- ered to Moran Towing. The vessel fea- tures an Intercon C series coupler outfitted with 34-inch diameter rams, hydraulic tensioning, port and star- board hydraulic power units, motor control center, logic/control panel and two touch screen station remote controls. The vessel is powered by two EMD 12-710G7C-T2 main engines each rated at 2,550 hp at 800 rpm and outfitted with Lufkin model RHS2500HG reverse reduction gears. Nominal gear ratio is 4:1. The engines are EMD’s new electronic engines that meet Tier II emissons standards. Mary Ann Moran has ABS grade two, 10-inch steel shafts and Rolls Royce New Generation Workwheel, five-blade, 115-inch diameter, stainless steel propellers. EMI supplied the electro-hydraulic steering system, which interfaces with the vessel’s gyrocompass and autopi- lot. The electrical system is a 480 VAC, three-phase, four-wire system, designed for non-paralleling opera- tion. The two ship service generators are John Deere Tier II emissions cer- tified 1,800 rpm marine engines with Marathon generators, each providing 125 kW, 480VAC, three-phase power. The main switchboard, manu- factured by Industrial Power Systems, is located in the engine room and fit- ted with a 480V, three-phase distribu- tion section. It is non-paralleling with a split bus. In accordance with SOLAS requirements, an emergency generator is installed above the main deck. The emergency generator is a keel cooled John Deere Tier II emis- sions certified 1,800 rpm diesel engine with a Marathon generator providing 65 kW. It is arranged to start automatically (electric start) upon loss of the ship service genera- tors. The emergency switchboard, also manufactured by Industrial Power Systems, will sense a loss of power from the main switchboard and automatically start the emer- gency generator and transfer energy loads. Markey capstans are located on the fore and aft decks. Accommodations for 12 crew mem- bers are provided. VESSELS Washburn & Doughty Delivers Mary Ann Moran Photo courtesy Washburn & Doughty Associates, Inc. Pedestal Crane Barge for New York Power Authority Great Lakes Shipyard of Cleveland, Ohio and the New York Power Authority (NYPA) coopera- tively commissioned and built a pedestal crane barge for the Lake Erie-Niagara River ice boom operations in Buffalo, N.Y., to help reduce potential damage to hydroelectric power plants caused by Lake Erie’s inevitable ice. The NYPA asked Great Lakes Shipyard, a member of The Great Lakes Group in Cleveland, to fabricate and deliver a new 80-ft by 34-ft pedestal crane barge for the ice boom operation. The shipyard purchased a Terex HP80 80- ton capacity pedestal-mounted crane from ALL Erection & Crane Rental Corp. ALL trucked the crane and pedestal from Terex in North Carolina to the Great Lakes Shipyard’s fabrication shop on the Cuyahoga River where the barge was built. There, the 60,000 lb crane body was lifted by a 250-ton assist crane, placed and mounted to the barge and fully assembled by ALL’s technicians on a specially built pedestal that was custom fabricated by Terex. Photo courtesy The Great Lakes Group
