by Dan Egan and Lee Bergquist,

The five adult bighead carp found below the Prairie Du Sac Dam on the Wisconsin River this fall are a stark reminder that Asian carp are not just a threat to the Great Lakes but also to Wisconsin’s thousands of inland lakes and rivers.

The good news is that the pathway up the Wisconsin River basin is blocked by the massive dam on the river about 30 miles northwest of Madison. The dam, opened in 1914, was built to generate hydroelectric power, but a century later it is also proving to be a valuable invasive species barrier.

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