That what happened to the little town where I was going to school, small flooding caused a dam which then broke causing a major flood. The dam though was a railroad bridge at another small town up river.
http://en.wikipedia.org/wiki/Cheat_River#1985_flood

Its also funny how the "official" stories don't match reality.

"The flood also wiped out the school in Rowlesburg, which caused the consolidation of a high school for the county"

The school board wanted the consolidated school well before the flood and the flood didn't wipe out the school, the school was sold and bought a few times and is now a WWII museum. The super great all county high school became a model for other counties shortly afterward then 20 years later the state took over the county school board due to corruption and stealing of lots of $. And those like me had to go buy a bunch of books to actually get an education.