A deep layer of muck that has piled up in Dorn Creek nearly tripped up Wisconsin DNR water quality specialist Mike Sorge as he helped Dane County conservation workers develop their $12 million plan to remove the material from 33 miles of waterways. The muck came from farm fields. It oozes nutrients into stream water and the nutrients contribute to unnatural weed, algae and bacterial growths in the county’s lakes. In this submitted video clip, Sorge measures the depth of the muck. (Video courtesy of Dane County)