PROJECT PROFILE As part of a multi-year program to re- place lock and dam structures on the Lower Monongahela River Navigation System, the U.S. Army Corps of Engi- neers (USACE) replaced an existing overflow dam structure with a fixed- crest, gated dam at the location of Locks and Dam 2 near Pittsburgh, Pennsylvania. The new dam was constructed using innovative “in-the-wet” methods that involves constructing drilled shaft foundation

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