Wis. Admin. Code Department of Natural Resources NR 22.03
All residents of Wisconsin and Iowa holding a resident fishing license from their respective states or residents other than Wisconsin and Iowa holding an angling license or sport fishing license issued by either state may fish in waters of the Mississippi river lying between the Chicago, Milwaukee, St. Paul and Pacific railroad tracks on the Iowa side of the river, and the Burlington Northern and Sante Fe railroad tracks lying on the Wisconsin side of the river, including all sloughs and backwaters, bays and newly extended water areas connected with the main channel of the Mississippi river by a channel which is navigable when the waters are approximately equal to the normal pool elevation as created by the U.S. army corps of engineers. This reciprocity applies only to hook and line fishing, spearing, dipnetting, and the taking of minnows and crayfish for such fishing. Spearing and dip netting are prohibited within 200 feet of any U.S. army corps of engineers locks and dams. Residents of either Wisconsin or Iowa may not fish in these boundary waters when the angler's state of residency license has been revoked.
Wis. Admin. Code Department of Natural Resources NR 22.03