Corn may work as bait, Iowa, but I think you'll do better with shad or artificials.
Change bait and send those pics!
The Yellow dots indicate the State Record (lb-oz or 00.00 lb), the Red dots are other fin locations that have been revealed to us. They link to Topozone maps that get you in the neighborhood, if not to the exact spot. The Photos name the location the fins were caught (if known). Thanks to Dave D (Osama Bin Bowfin) for this idea.