From Ohio History Central The Michigan Survey helped escalate
tensions between Ohio and the Michigan Territory over the two
geographic regions' mutual boundary. The Northwest Ordinance of
1787 established the northern boundary of Ohio as "an east west
line drawn through the southerly bend of extreme of Lake
Michigan." The United States Congress restated this line as
Ohio's northern boundary in the Enabling Act of 1802, the
legislation that led Ohio to become a state. The Congress also
used the same language when it established the Michigan
Territory in 1805. The Congress incorrectly believed that the
line would intersect Lake Erie north of the Maumee River's
mouth. During the Ohio Constitutional Convention of 1802,
delegates received word from a fur trapper that the line would
actually fall south of the Maumee River. The convention
delegates stipulated in the Ohio Constitution of 1803 that
Ohio's northern boundary must include the Maumee River's mouth.
The United States Congress accepted Ohio's constitution,