How Plausible Is This?!: Stuart Little Broke The Levee

This morning, more levees along the Mississippi River let loose. Tragically, floodwaters have rendered Lincoln County, Missouri an underwater sea-town.

In the wake of other levees along the Mississippi River breaking, the levees that broke a few hours ago were supposed to be fortified and monitored. According to a public information officer for Lincoln County, the county thought that the fortifications were strong enough to hold the water back. However, this has obviously been proven as a gross error in judgment.

According to officials, the cause of today's levee breakage was muskrats' digging. CNN.com states: "Though overnight rains were reported in the area, officials speaking at a Friday morning press conference said muskrats looking for food or making dens had dug into the earthen levee, weakening it enough that nature took care of the rest." The U.S. Army Corps of Engineers reportedly co-signs this theory.

My only question is: Were the levees mortared with spit and bubble gum?
What exactly is going here?

My prayers go out to the families and communities affected by all of the recent floodings.