Welcome Kentucky Fried Crappie. I fish for them below the dams and the water has to be just right on flow. Takes a few trips to figure that out. I use 1 oz. to 1.5 sauger jigs tipped with a minnow. I would highly suggest you go with an experienced person on the dams. They are very dangerous and require a lot of respect especially the Ohio dams!! Ifish the Ohio if the flow is below 25 feet of dam. Water temp in the low 50's is when I start. Here is a link.
http://www.lrd-wc.usace.army.mil/Ohi...xt/lourpti.rpt