If a hurricane hits southern Louisiana this year, a critical portion of the roadway that carries almost 20% of the nation’s total oil supply from the Gulf of Mexico should remain high and dry. The Louisiana Dept. of Transportation and Development on July 7 plans to open the first 4.4 miles of the new Louisiana Highway 1. The eventual 18-mile, 26-ft-high, four-lane elevated route between Golden Meadow and Port Fourchon will replace the existing, flood-prone La. 1 that is slowly sinking. Photo: James Construction Group Temporary piles support a trestle that serves as a work platform over marshes. Related Links:
Arch dams, classically curved monoliths situated in narrow valleys, are not as common as other types of dams, such as embankment dams and gravity dams. ENR takes a look at some of the biggest arch dams in the world, both completed and under construction.