I drove by this last weekend. It is being used to haul loads of scrap metal around the scrap yard.
LARC-V (Lighter, Amphibious Resupply, Cargo, 5 ton), is an aluminium hulled amphibious cargo vehicle capable of transporting 5 tons. It was developed in the United States during the 1950s, and is used in a variety of auxiliary roles to this day.