Datsun310Guy wrote: I have little to add to help you but I did stay in my own bed last night. I did tour the Thornton, Illinois quarry looking at conveyor belts a few years ago. I80/I90/I294 crosses over the quarry and those who have seen it from a higher vehicle freak out a little. If you are in a car you can't really see down the sides.
That's the one! A 1/2 mile from my house. One section will become a storm water runoff storage pit when the "Deep Tunnel" project gets done. I'm told the limestone layer is 400 ft thick in places. The whole Chicago area could be a limestone quarry, just take off the topsoil and your there!
