I know that the DNR and the lake manager there are quick to point the finger and say that people are putting the shad in there and maybe that is true... maybe it is not, but the fact of the matter is that as long as they allow people to use minnows and minnow buckets down there they are going to keep having the shad as well as other undesirable species get back into the lake. They can't explain how the carp got back into the lake and I don't know anyone that would want carp in the lake for any reason. It would be logical that however the carp got into the lake, that the shad came the same way.
I wish they would instead focus on habit and adding aquatic vegetation to the lake. I know that a lot of land owners don't like the vegetation, but it is a proven fact that a lake with vegetation can support 10 times the bass and panfish population than a lake without. The vegetation also filters the water and makes it much cleaner.
I have caught a multiple limits everytime I have been there this year and several fish over 7lbs. There is no other lake in the entire midwest that you can do that on a regular basis. It is like cutting of the nose off to spite the face.
... just my two cents.