The Illinois DNR performs shocking in the lake once every few
years and writes a report on what's there. This is helpful for
tracking how fast fish are growing, spawning cycles,  and what
needs to be stocked
.

DNR Report on 2006 lake shocking (.pdf)
Pictures taken during shocking on Sept. 6, 2006.
Pictures taken during shocking on Sept. 6, 2006.
NEW!  Shocking 2009 page