When do the spawn??

[Guest]

First off I would like to say hello to all.
Secondly Is there anyone here from NW IA that fishes the Little Sioux River??
Lastly......When do walleyes spawn in the river (water temp.....etc..) what method do you use for this (bait, jig, technique, etc..). And what would be good structure to find spawning walleyes in (on a river) would a nice sandbar where a decent sized crick dumps in be a good spot??

Thanks to all who reply