A) N Wave (Neenah)

Lake Winnebago is a very large, shallow lake, formed largely by the existence of dams in Neenah. There is a large island (1.1 square miles, which is shared between Neenah and Menasha -- filled with buildings, businesses, streets, etc) with dams and millraces and locks (for passage upstream and down, for motorboats to move from Green Bay to Lake Winnebago) on either side of the island. The millrace on the west channel lies mostly 'piped' underground, but as it spills back into the lower channel, flanked by cement walls, it forms a surfable, potentially playable hole when flow and water levels (upstream and down) are favorable. Fortuitously, this appears to be most likely in midsummer and early fall, when little else is available!