No man, I've never done it. I'm just giving conjecture based upon what I've read and what I'd try. I love threads like this which take fishing down a less beaten path.
(On a med-hvy baitcasting rig; slow roll a white 1 1/2 oz Northland willow leaf spinnerbait it the tailrace. Affix a glow in the dark grub to your trailer hook, let the current do most of the work...I say Northland because it allows the use of a wire leader without modifying the shaft you may not need this leader but it's nice just in case)