CASTLE ROCK, Colo. -- Beavers are causing a problem in Castle Rock.
They're knocking down trees and building dams. That's what beavers do.
The problem is the trees are falling on busy trails used by hikers, bikers and runners, and the dams are causing unwanted flooding in some places.
So, officials have found a way they think will discourage the beavers from their activities.
Details in Dan Daru's report.