It's pretty hard to prove a negative, but just from a practicality standpoint I've got to call that [b]extraordinarily[/b] unlikely. You'd be talking about millions of dollars even in 1920 money, and where would the lake end of such a tunnel come out? Hundreds of acres of new parkland were being added out in the lake in the 1920s, which would have either led to discovery or pointlessness. Any boat big enough to cross Lake Michigan would have attracted Coast Guard attention and been too large to get close to shore. Much easier to make quick runs across the Detroit River and then drive the stuff to Chicago.
[url=http://dl.dropbox.com/u/1938060/Lake%20Shore%20Dr%20at%20Irving%20Park%2020s.jpg]Here's an amazing colorized aerial photo[/url] looking north from Irving Park about 1928.
Edited 1 time(s). Last edit at 04/12/2013 12:38AM by Mr Downtown.