 The construction of the six O 'Brien @-@ class ships was allocated to four U.S. <unk> . William Cramp constructed a trio of O 'Brien destroyers , while the Fore River Shipbuilding Company , Bath Iron Works , and New York Shipbuilding Corporation built one ship each . The <unk> for all six ships were laid down between July and November 1913 , with McDougal being the first and Ericsson the last . All were launched between April 1915 and January 1915 , with McDougal again being the first and Winslow being the last . McDougal was commissioned in June 1914 , two months after her launch ; the rest were commissioned between April and August 1915 , with Cushing the final ship to enter service . The cost of each ship for hull and machinery was $ 790 @,@ 000 . 
