Tug transporting dredgeDry Tortugas National Park; National Park Servicephoto of tug; prime mover to move dredge from place to place - necessary to move continuous supply of sand - fill [illegible
Bulldozer and tractorDry Tortugas National Park; National Park ServicePhoto of bulldozer (small and farm tractor). Tractor used to haul and lay "Spoil Pipe"