Take Airline Highway (U.S. 61) North to Interstate 310. Follow the signs to Interstate 310 South. This Interstate will take you over the Mississippi river and then ends at the intersection with U.S. Highway 90 toward Houma. Take the first Houma exit (LA 182), heading west on LA 182. Turn left when you reach he intersection of LA Hwy. 3087. Remain on this highway, which becomes Prospect Street, until you reach the intersection of Grand Caillou Road. Turn left on Grand Caillou, heading south. Turn right on Thompson Road. Gulf Island Fabrication, Inc. and Gulf Island, L.L.C. are located at the end of this road on the left; Dolphin Services, L.L.C. and Southport, L.L.C. are located on the right.