Ray Rieser Sunday, Aug. 6, 2023 12:01 p.m. | Sunday, Aug. 6, 2023 12:01 p.m. The concrete locks and dams along the Allegheny River were built in the 1920s and 1930s, but three dams built around ...

After the St. Francis Dam disaster of 1928, engineers applied lessons learned to expansive dam projects in the American West. Beginning in the 1930s, large dams were built on important watersheds ...

New dams and their reservoirs have transformed the Lancang River—the upper Mekong—flooding riverside towns, farms, and roads. Along a reservoir created by the Gongguoqiao dam, goats are herded ...