The second deadliest dam failure in U.S. history happened suddenly. The St. Francis Dam was a 205-ft-high concrete gravity arch dam located in San Francisquito Canyon, 30 miles north of Los Angeles.
Turning on the lights all across Utah — in Bountiful, Logan, Hurricane, Murray, St. George or Blanding — happens instantaneously. But all of those cities receive some electrical power from hundreds of ...