Hoover Dam stands today as one of the ten greatest Civil Engineering feats of the 20th Century. When built, it was the tallest dam in the world and was surpassed in size only by the pyramids of Egypt.

Andrew J. Dunar teaches history at the University of Alabama in Huntsville. He is the co-author of Building Hoover Dam: An Oral History of the Great Depression. He answers a few questions about major ...

Saturday commemorates the 89th anniversary of the Hoover Dam's completed construction, considered by most experts "a modern miracle" and one of the most visited sites in the world. The 726-foot-high ...