Here's something else that you may find surprising: Iowa has decent-sized coal deposits too.
They're located in the south-central part of the state. Here is a link that may interest you:
http://fp.uni.edu/iowahist/Social_Economic/CoalMining_inIowa/coal_mining_in_iowa.htm
Where does a fella buy coal, anyway? I don't think we have a coal company anymore in town, and nothing in the Yellow Pages...