I would ask for the whole place to be surveyed. The proper boundary should located using the thalweg, as it existed when the body of water was first put to beneficial use including navigation.
About 10,000 years ago that would be a bit west of Ann Arbor. Looks Like Detroit belongs to Canada , eh.
5 posted on 07/28/2010 3:39:27 AM PDT by kbennkc
(For those who have fought for it freedom has a flavor the protected will never know .F Trp 8th Cav)