Throughout his time in Chicago, Mather never forgot his home in New York. In 1893 he proposed a design for an international harbor on the waterways around Fort Erie, Ontario/ Buffalo, New York. Mather's plans included new electrical generation plants at the falls; his plans conflicted with those of other electricity companies in the area, and Mather's plan was eventually abandoned. The US-Canada Peace Bridge was constructed at that location within his lifetime, but it was not based on any of Mather's plans.