Despite an early-contractor-involvement award protest by Granite Construction, Watsonville, Calif., the U.S. Army Corps of Engineers expects to start constructing an estimated $155-million storm-surge barrier on the Lake-Pontchartrain side of New Orleans this summer. Photo: USACE/HPO Lift and sector gates would close the north end of New Orleans’ Inner Harbor Navigation Canal against storm surge, closing another chink in defenses. Related Links: New Orleans Surge Barriers Take Shape “We expect the ECI will be awarded in the next two to three weeks, and under a best-case scenario, we’ll start construction in July,” says Eric Stricklin, the Corps’ project manager. The
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.