Union
Plumbers, Pipefitters and Service Technicians Local 776, International Brotherhood of Boilermakers, Iron Ship Builders, Black Smiths Forgers & Helpers Local 85, United Brotherhood of Carpenters and Joiners Local 372, Millwrights Pile Drivers Local 1090, International Union of Operating Engineers Local 18, International Brotherhood of Electrical Workers Local 32, Laborer's International Union of North America Locla 329
