Dynamic Group and EvCo Development will each build a section of the planned 17.5-mile West Shore Lake Pontchartrain levee system. 

The firms will plan the replacement or rehabilitation of nearly 100 bridges and other structures along a 6-mile stretch of Chicago's south side where more than 100 trans from six rail lines meet daily.

But the megaproject's current chances of successful delivery was rated "unachievable" by the government's Infrastructure and Projects Authority in its recent annual review.

Firms will build planned 30,000-seat ballpark on the Las Vegas Strip for  Major League Baseball's Athletics, which is relocating from Oakland, Calif.

Nearly 20 years after beginning construction and $1.23 billion later, the U.S. Army Corps of Engineers' Charleroi Lock and Dam in Monessen, Pa., is scheduled to be completed later this year. 

Construction and transportation officials say implementing the new requirements could pose problems.

High-voltage direct current undersea cable and added infrastructure will link the two countries' electrical grids, enabling a bidirectional power flow between Africa and Europe for the first time.

Report by transportation trade group ARTBA says the number of deficient bridges declined by 560, or 1.3%, over the past year.