On first thought, building a 2-mile section of elevated, twin bridge interstate highway doesn't seem like an especially challenging project. I-310, however, is no ordinary highway. Connecting I-10 and U.S. 61 just west of New Orleans, the highway is the primary hurricane evacuation route for coastal areas south of the city. Because alternate corridors did not exist, the highway had to be built through an environmentally sensitive, aligator-filled, cypress swamp. When it was awarded the contract in 1988, New Orleans' contractor T.L. James & Co. knew they would have to overcome some unique challenges. Because the cypress swamp is a protected wetlands, work could not take place off the swamp floor. In addition, the soft soils offered no solid bearing for the four-lane highway, designed to handle heavy traffic. To further complicate matters, the nearest precast plant was more than three hours away. The project was completed 265 days ahead of schedule. There were no lost workdays during the total 600,000 work hours that included transporting the pieces to the jobsite; placing and installing the piles, pile caps, and deck slabs; bridge deck paving; and slipforming safety barriers.