I was down there one day several years ago just looking because I wasn't about to put my boat in there. All of the gates were open and there was a West wind blowing 20+ mph. The wind coupled with the water flow at probably 20 MPH in the direct opposite direction had waves that looked like they were about 5' from crest to trough with a very short length to them. There was huge splashes up on the banks all the way up to the picnic tables. There was some IDOT there in a center console with water splashing over the rails with every wave. He must have had a couple of hellacious bilge pumps going.