Mammoet awarded construction upgrade of Hawaii dry dock

The transport engineering company will be responsible for the moving and installing drydock floor sections weighing upwards of 4,000 tonnes (4,400 tons) each using SPMTs and a specialised gantry. 

Work on installing foundational piles into the harbour waters has already begun, with project completion expected by late 2027. Pierre Mille, sales manager for Mammoet, said: “The heavy lift and transport development strategy we have shared with DHO will allow us to provide an efficient solution and offer the best possible execution strategy for this project.” 

The new dry dock will be deeper than the existing facility, which will be replaced and able to accommodate Los Angeles and Virginia-class attack submarines for repair, maintenance and modernisation. 

This initiative is part of the US Navy’s Shipyard Infrastructure Optimization Program (SIOP). The project will support Pearl Harbor Naval Shipyard and Intermediate Maintenance Facility’s (PHNSY & IMF) ability to continue serving the Navy decades into the future by maintaining and modernising the US Pacific Fleet’s nuclear-powered submarines.