Between July 12 and October 26, 1915, Samuel Stinson Gannet, geographer of the United States Geological Survey, and his crew retraced and surveyed the Ohio and Michigan state line. Working with a transit and dragging a 300-foot steel tape, the crew surveyed 69.92 miles and set 72 granite monuments. The 700-pound monuments were 5 feet 6 inches tall and cost $18.00 each, including delivery from Mount Airy, North Carolina. The top 18 inches were cut and carved by Lloyd Brothers in Toledo. When the survey was complete, it ended one of the greatest disputes over a state line in the history of the United States.