Since 1950, the number of large dams has climbed from 5,000 to more than 45,000—an average construction rate of two large dams per day for half a century. Globally, 364 large water-transfer ...

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 ...