
Aerial photo released by the California Department of Water Resources, showing the damaged spillway with eroded hillside in Oroville
The spillway recently made news when it began ripping away under unusually heavy rain and snowmelt. Some 188,000 people had only hours to escape.
This sort of engineering mistake is similar to what happened in the 1980s when the US Army Corps of Engineers was behind schedule in building protective hurricane levees in New Orleans.