Wisconsin has about 400 miles of Lake Michigan shoreline. But a dispute in Shorewood has ignited a debate about who has access to that shoreline. The public can get to the water at Atwater Beach in Shorewood. But residents with homes to the north and south of that beach own everything down to the water’s edge. A Shorewood resident challenged that policy in municipal court earlier this month, and a judge will announce a ruling early next year. This debate has been going on for decades and has been settled in other states, according to David Strifling. He’s an associate professor at Marquette University’s Law School. He joins WUWM environmental reporter Susan Bence to explain the Public Trust Doctrine.