The shipyard had recently won a contract worth $3.9 billion to build four of the DDG-51 warships. : BATH — Bath Iron Works has received an award to build a fifth Arleigh Burke-class destroyer as part of the $3.9 billion multi-year contract it received from the Navy in September. The initial contract called for Bath Iron Works to build four DDG-51 destroyers, one each year from 2019 through 2022. At that time, BIW rival Huntington Ingalls of Mississippi was awarded $5.1 billion to build six of the destroyers, raising concerns about the future of the Bath shipyard.