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Dredge MURDEN Digging in Clearwater, FL The split-hull shallow draft Dredge MURDEN arrived at its first dredging job in Clear- water, Florida on its way home to Wilmington District, N.C. Although the design is simi- lar to the Special Purpose Vessel CURRITUCK, which is a converted split-hull hop- per barge, the MURDEN is a cargo ship with a USCG Sub- chapter I Certificate of In- spection and ABS Classifica- tion. Marine Design Center worked with Wilmington District to establish the de- sign objectives and concept design. Jensen Maritime Con- sultants prepared the contract design. Conrad Indusries, Morgan City, La., was awarded the construction contract. Conrad received detailed design support from Bristol Harbor Group, Inc. The mission of the MUR- DEN is to dredge the low-use shallow water inlets and the Intracoastal Waterway along the East Coast. This pre- sented some significant de- sign hurdles to overcome. For instance, how do you arrange 10 lbs of machinery into a 5 lb dredge and maintain a 4’- 3” light draft? In addition, the ship needs sufficient propul- sion and steering power to handle the winds and currents on North Carolina’s Outer Banks ocean bars. The design also needed to be structurally robust since the dredge will spend much of its time “touching” the bottom. MURDEN will operate as a day boat so it has no quarters on board, and comes to the dock every night. The dredg- ing control and monitoring system is DQM Certified. All hydraulic fluids on board are environmentally friendly. In fact, the system which opens and closes the two split hulls is water powered by BOC Water Hydraulics, Inc. Vessel Particulars: Length: 156’ Beam: 35’ Depth: 10’-9” Draft Light: 4’-3” Draft Loaded: 9’-0” Hopper Volume: 512yd3 Propulsion: ZF/HRP 4111 Azimuth Stern Drive Main Engines: Cum- mins QSK19-M, 760HP Dredge Pumps:Mobile Pulley 100 HP VFD Electric Drive Bow Thrusters: (2) Wesmar 100 HP VFD Elec- tric Drive Generators: (2) Cummins QSM11-DM 250 KW Navigation Suite: Radio Holland Dredging Controls: DACS, Inc. Hopper Loading WHEELER Engine Removal MURDEN During Dredging Trials The new dredge is a great addi- tion to the Corps’ fleet and a welcomed relief to the small ports along the East Coast. MURDEN Delivering Sand to the Beach in Clearwater WHEELER in Drydock, engine and ship prepared for remov- ing in one piece Cooper 16 Cyl Propulsion Engine on rails outside the hull. Weight Approx. 50 Ton Spreader Beam Attached to Main Engine Main Engine Clearing The Drydock Page 5 Issue # 17PDF Image | USACE MARINE DESIGN CENTER Newsletter
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