 In 1923, the city of Detroit and Grand Trunk Western Railroad began a plan to build 22 grade separations; both parties agreed to share the cost.One of the tracks to be regraded was the line paralleling St. Aubin.These tracks ran from the northwest, where they connected with a network of other lines, to the southeast, where the tracks turned to parallel the river and supplied a number of large factories, including the Detroit-Michigan Stove Plant, the United States Rubber Company Plant, and the Parke-Davis Laboratories.