Slum,

I don't know the address just now but there is a goverment site the list wages by job leval and area. You might find it if you search ECN or maybe someone elce knows it.
http://wic.ilworkinfo.com/analyzer/saintro.asp?cat=INC&session=oeswage&time=&geo=
Heres one for IL only, look under cunstruction.