The Wabash River in Tippecanoe County reached more than 14 feet above flood stage on Saturday, the highest level since 1958.

NPR: Crests Approaching In Several Towns In Midwest

Goforth, an assistant professor of forestry and natural resources, said he and his colleagues focused their study on the Wabash River in Indiana.

WSJ: Asian carp spawning areas wider than expected

The Wabash is "probably the smallest river in which we are aware of Asian carp spawning, " Chapman said.

WSJ: Asian carp spawning areas wider than expected

Authorities have built a fence in the Fort Wayne area to prevent the carp from migrating from the Wabash to the headwaters of the Maumee River, a Lake Erie tributary regarded as ideal spawning habitat.

WSJ: Asian carp spawning areas wider than expected