I catch most of my walleye in Green River at Locks 5 and 6, we catch them at Nolin in the spring too but it's sporadic at best catching a couple keepers from 20 up to about 25 inches a trip. I can usually find walleye with side imaging sitting on the tips of points that run out to the river channel, seems that's where they spend the daylight hours, then when it starts getting dusky dark they rise up and feed for a short period(that's when i catch them) then they just seem to disappear. on the river i use 1/8oz-1/2oz jigs (weight depending on speed of current)hopping them off the bottom by the locks on the edge of fast current and slack current tipping the jigs with curly tail grubs when there biting good or straight tail worms with a stinger when there nipping. there the same way on the river seems like they will shoot up and feed for a little while then they're gone