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UNAFLEX Artist's rendering of P&H model 5700 excavator rigged as dipper dredge. Harnischfeger To Build World's Largest Dipper/Clamshell Dredge Harnischfeger Corporation of Milwaukee has announced that it has been awarded a contract to build the world's largest dipper/ clamshell dredge for Great Lakes International Corporation of Oak Brook, 111. The dredge will consist of a P&H 5700 electric excavator mounted on a self-propelled 220- by 75-foot hull. It will operate with either a 27-cubic-yard dipper or a 50-cubic-yard clamshell bucket for excavation of harbors and river channels. The excavator will be readily convertible from shovel con- figuration to clamshell boom opera- tion for maximum versatility. The operating weight of the 5700 excavator, excluding the hull, will be about 1,000 short tons. The unit's slewing rim (turntable) will be at- tached to the hull on a large adapter mounting designed by Harnischfeg- er using CADAM-NASTRAN com- puter engineering technology. This design capability not only optimized the configuration and costs of the hull adapter, but also reduced man- hours significantly to speed the de- sign process. As a dipper dredge, the 5700 has a 92-foot shovel boom equipped with a 92-foot handle and 27-yard dip- per. The boom is set at a 25-degree angle to accommodate an under- water digging depth of more than 70 feet and a maximum dumping ra- dius of 113 feet. The clamshell has an even more impressive working range. The 155- foot-long, lattice type boom is equipped with a 50-yard bucket that has a maximum digging depth of 150 feet below the water surface. Maximum dumping radius is 120 feet. A pair of diesel generator sets mounted within the hull will pro- vide power for operation of the elec- tric excavator. Each generator will be driven by a 4,400-bhp GM Elec- tro-Motive' Division EMD20-645 diesel engine. The dredge will be controlled by a P&H Electrotorque® solid-state system. Total connected DC rated power of the electric mo- tors aboard the 5700 is 5,625 hp. For further information on P&H excavators, Circle 61 on Reader Service Card Bethlehem Steel Dedicates Its New Sabine Yard In Port Arthur, Texas Circle 139 on Reader Service Card Bethlehem Steel Corporation ded- icated its new Sabine Yard recently in Port Arthur, Texas. The keynote speaker, Walter F. Williams, Bethlehem's president and chief operating officer, said that despite current depressed condi- tions in the industry, the new yard is in a good position to be profitable and to provide badly needed em- ployment in the Port Arthur area. The Sabine Yard is the only facili- ty of its type in the Gulf area and its 64,000-ton-capacity drydock—one of the largest in the nation—is capa- ble of servicing any type of mobile offshore drilling unit and produc- tion facility, as well as all types of ships. Mr. Williams noted, too, that since the greenfield facility is lo- cated only eight nautical miles up- stream from the anchorage at Sa- bine Pass and there are no bridges to restrict marine traffic, the new yard will provide easy access from and to the Gulf of Mexico. The depth of the Sabine-Neches Ship Channel at Bethlehem's 100- acre Pleasure Island location is 40 feet. It is downriver from the Beau- mont Yard which has been operated by Bethlehem since 1947. Dignitaries from federal, state and local governments, as well as community and business leaders and union officials, took part in the dedication ceremonies for the Sa- bine Yard. In addition to Bethlehem's presi- dent, other company officials par- ticipating in the dedication were David H. Klinges, vice presi- dent, marine construction group, Richard E. Blackinton, general manager of the new yard and Bethlehem's Beaumont Yard, and Frank W. Richardson III, man- ager of the Sabine Yard. The new facility went into service on August 3, 1985, when a ship reconstructed by Bethlehem at Beaumont for the U.S. Navy's Mari- time Prepositioning Ship Program utilized the yard's newly modified 64,000-ton-capacity drydock. While the ship was drydocked, its hull was cleaned and painted and a new pro- peller was installed. Three other ships have been serviced at the Sa- bine Yard since then. The dedication climaxed a series (continued) The Sabine V, which provided an appropriate backdrop for Bethlehem Steel Corporation's dedication of its new Sabine Yard, became the first deepwater mobile offshore drilling unit in the world ever to be docked on a floating drydock. The Sabine V, a 200-foot jackup, underwent minor repairs and inspection during its brief visit to the yard. The floating drydock is one of the nation's largest and is the only one in the world that can be configured in either a ship mode or a rig mode. The dedication ceremony was held on the drydock and during the program guests boarded the drilling rig for a tour of its facilities. 14 Maritime Reporter/Engineering News
