On this day in history, July 7, 1930, Hoover Dam construction begins Posted by | Jul 7, 2024 | Red Pill NOWlej | 0 | Construction of the Hoover Dam, on the Nevada-Arizona border, began on this day in history, July 7, 1930. It covers over 220 acres and is a National Historic Landmark. Read More in FOX News. Read More in Red Pill NOWlej.