Ok… So I think I found the elusive “Michigan Beach” in Joliet.
I googled “Michigan Beach” Joliet and stumbled upon this topo map from the USGS.
The dual horizontal red line is I-80. I’m pretty sure the vertical red line is Richards Street. Now if Michigan Beach is “lake 565” there in the middle, some others from the Joliet area might remember it as the Joliet Beach Club. I used to go there all the time when I was a kid. They eventually had to close it due to some really nasty virus that infested the water. You can still see this gem from I-80 if you’re heading west. Hop on at Briggs and stay in the right lane. When you start driving on the elevated highway, look off you your right. The beach house/concession stand is still there and the “beach” is completely overgrown with weeds, but it’s still there.
Looks like Uncle Leroy is gonna lose some business…
Here’s an aerial link from Google Maps