Totally low; nothing but a scrape.
Just a FWIW, there is a small dam in Johnsonville (near the Johnsonville (brats) plant), which can be run, and could offer some play at some flows. (Not sure what might be the best flows -- not enough experience with it. I've looked at 586 cfs and 800 cfs and base of dam looked largely unplayable.) There is some (very little) additional minor play possible between the dam and the road.
Distance listed is 'crow flies' distance (from parking at Sheb.Falls), not river or road distance.
USGS lists a sampling site (at the bridge) with drainage area of 194 square miles. This suggests flow at this point might be less than half (0.464*) the active Sheboygan gauge.