Glad you found it helpful, 48307. I haven't looked, but I suspect Michigan might be one of the very few, if not the only, states that have all this info readily available on the Internet.

Sandhouse, as the map I linked indicates, the southern interchange was to be in Alaeidon Twp., Ingham County. I don't know where the northern interchange was to be, but somewhere around the current I-69 Woodbury Rd. exit seems logical. That's the shortest distance to the southern interchange, allowing for a bend to get around the Lake Lansing park.