With Crowley's vessel construction boom in full swing, shipyard employees, Crowley personnel and distinguished guests paused this weekend to welcome the newest heavy-lift deck barge to the Crowley fleet - the 455-6 - sixth in a series of heavy-lift deck barges slated to be built and put into service by 2013. Against the backdrop of a Hawaiian-themed christening, Sandi Gresham, the wife of Bruce Gresham of Heerema Marine Contractors in Houston, Texas christened the barge with a bottle of champagne, launching it into the Willamette River at the Gunderson Marine shipyard in Portland.