News: Bollinger Refits Vessel for Deep Dredging

Wednesday, September 03, 2003

Exhibiting the cumulative strength of its vast organization, two Bollinger shipyards teamed on an innovative project to increase the dredging depth of the Pine Bluff Sand and Gravel Co. dustpan dredge, Wallace McGeorge, from 62-ft. to 75-ft., enabling it to dredge at higher river stages and dispatch sooner on a falling river. To complete the task, Bollinger Quick Repair, Harvey, La., fabricated and installed 45-ton, 36- by 20-ft., port and starboard sections to the horn of the dredge, increasing the vessel's overall length from 252.5 to 288.5 ft. The shipyard then installed a new 46-ton, 40-ft. wide by 15- by 30-ft. high, A-frame which it had pre-fabricated for the dredge. The A-frame, which more closely resembles an inverted "U", is used to accommodate a new "ladder" that was fabricated at Bollinger Gulf Repair, New Orleans and installed at Bollinger Quick Repair.

"By assigning the work to two of our shipyards, we were able to complete the entire job in just over three months," said Allen Stein, operations manager of Bollinger. The 120-ft. long by 17-ft. wide, 93-ton ladder is fitted between the legs of the A-frame and the two new hull sections so it can be raised or lowered to the required dredging depth. The 20-ton, 30.25-ft. wide dustpan suction head tips the lower "business" end of the ladder. The dustpan, which can be likened to a vacuum cleaner, is very efficient in excavating sand material from river bottoms. When the suction head is lowered to the river bottom, high velocity water jets on the suction head loosen the material, which is then drawn up by a single hull pump and transported through a floating pipeline mounted on pontoons and deposited outside navigation channels.

An EMD 20-645-E4-diesel engine powers the pumping and suction systems and the boat's propulsion is supplied by two Caterpillar 3516 diesels driving through Ulstein Z-drive units. Ducote Engineering Associates, Inc. of Jefferson, La. provided design and engineering services for the project. The Wallace McGeorge is under contract with the U. S. Army Corps of Engineers (USACE), Memphis District, to help maintain Mississippi River deep draft crossings between Baton Rouge and the Gulf of Mexico. According to Joaquin Mujica, USACE operations manager for South Louisiana ports, this area includes the largest U.S. ports based upon tonnage.

Mujica said the modified Wallace McGeorge will give the USACE a "bigger stick", meaning deeper dredging capacity. He said dustpan dredges are more advantageous than cutterhead dredges in certain applications as they are self-propelled making them more mobile. He added that dustpan dredges are more economical than cutterheads for deep draft channel crossings.

Mark Lemoine of Pine Bluff's Alexandria, La. office said Brown and Root built the Wallace McGeorge, whose original name was Carl Burkhardt, in 1965 as a cutterhead dredge. Around 1980, it was converted to a dustpan dredge and renamed Lenel Bean by Bean Dredging, who had acquired the vessel. In 1991, Pine Bluff bought the vessel and later renamed it Wallace McGeorge, for a member of the company's second generation of owners.

Maritime Today


The Maritime Industry's original and most viewed E-News Service

Maritime Reporter April 2016 Digital Edition
FREE Maritime Reporter Subscription
Latest Maritime News    rss feeds

Contracts

Baltic Dry Bulk Index Dips on Weak Demand

The Baltic Exchange's main sea freight index, tracking rates for ships carrying dry bulk commodities, continued to dip on Wednesday due to sluggish demand across vessel segments.

Tanker Departs Libya Empty amid Political Crisis

A tanker that an oil company set up by Libya's eastern government prevented from loading has left the eastern port of Marsa el-Hariga, a port official said on Wednesday.

Maersk Mulls Acquisitions after Surprising Profit

Fragmented sector chasing alliances to cut costs; Maersk has plenty of cash for deals - CEO. A.P. Moller-Maersk returned to profit at its main container shipping business in the first quarter,

Dredging

Great Lakes Inks M.E., N.C. Coastal Protection Project Deals

Great Lakes Announces $55 Million in Subcontract Work in the Middle East and Award of $38 Million for a Domestic Coastal Protection Project Great Lakes Dredge

USCG Uses Skiff Ice Boat to Rescue Injured Man

The U.S. Coast Guard medically evacuated a man off of a dredging barge in Lake Erie near Sandusky, Ohio, Wednesday evening. At approximately 5:45 p.m., a good

New Dredged Material Site Proposed in LI Sound

The U.S. Environmental Protection Agency (EPA) has proposed to designate a dredged material disposal site to serve the eastern Long Island Sound region. The Eastern

 
 
Maritime Contracts Maritime Standards Navigation Pipelines Pod Propulsion Salvage Ship Electronics Ship Simulators Sonar Winch
rss | archive | history | articles | privacy | contributors | top maritime news | about us | copyright | maritime magazines
maritime security news | shipbuilding news | maritime industry | shipping news | maritime reporting | workboats news | ship design | maritime business

Time taken: 0.0812 sec (12 req/sec)