On Sept. 5, 2019, a long unknown and undetected flaw became an impending failure at Bonneville navigation lock. More than 70 feet underwater, sections of rebar, threaded through 40,000 pounds of ...
PITTSBURGH – The newest navigation lock on the Monongahela River is massive. It can fit nine barges and hold 20 million gallons of water, and it is now finally empty. The U.S. Army Corps of Engineers ...
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