VT Halter Marine Inc., signed a $16.3m contract to build a catamaran lift barge for Washington Group International (WGI) and WGI’s joint venture partner, Alberici Group. The vessel will be fitted with special lift equipment that will be used to transport and place precast concrete segments in the U.S. Army Corps of Engineers’ Olmsted Dam construction project. VT Halter Marine will build two 200 x 90 x 15-ft. units that will be assembled to form the catamaran lift barge. The vessel’s configuration will allow it to effectively assist in the Olmsted Dam construction efforts, which will take place near Olmsted, Illinois on the Ohio River. 2H 2006. The catamaran lift barge will be in service for approximately six years on this project. regard to structural hull design.