Dozens of trees around Krueger Lake at Jefferson Proving Ground show the distinctive markings of beavers. (Staff photos by Ken Ritchie)
Dozens of trees around Krueger Lake at Jefferson Proving Ground show the distinctive markings of beavers. (Staff photos by Ken Ritchie)
Beavers have been busy at Krueger Lake in the Jefferson Proving Ground.

This winter, a licensed trapper will attempt to rid the lake of a few beavers by kill-trapping the animals, according to Jefferson County Parks Board member Ken Knouf.

Krueger Lake was developed in the early 1970s by Jefferson Proving Ground workers, but the site is now run by the county.

At the lake, beavers have gnawed down a good portion of the treeline to build dams that are clogging the emergency spillway, which was constructed to keep the lake from reaching flood stages.

Knouf said the spillway was built about eight years ago, adding that the location has had a problem with beavers for more than five years.

He said there is no goal for the number of beavers that need to be removed, but he estimated that the there is presently a "very large" colony of beavers on the grounds.

The beaver, which is the largest rodent in North America, is mostly a nocturnal creature, according to the Indiana Department of Natural Resources website. It has few known predators and can live to be anywhere from 10 to 20 years old.