First Welland Canal reason for the error is not known. On July 4, 1818, Merritt organized a meeting in St. Catharines. The outcome was a petition sent to Upper Canada Legislature to provide for construction of a canal between the Twelve Mile Creek and Welland River. Unlike Merritt's original water-canal plan, the petition included plans for allowing boats to cross the Niagara Escarpment. In 1823, Hiram Tibbetts, an engineer, was employed to make a formal survey for the route. He suggested to dig a channel below the surface level of Welland River between present-day Port Robinson and Allanburg, and then follow the Twelve
Welland Canal, bridge 13 By-Pass. Construction proceeded through the 1972 shipping season, and by the end of that season, work was close to completion. In the late evening hours of December 15, 1972, the Main Street Bridge raised to allow the passage of the Georgian Bay - officially the last ship through the city of Welland. In fact, the bridge was raised again the next day to allow a St. Lawrence Seaway service vessel to pass, but the Georgian Bay remains the official last passage under the bridge in most historical records. Following the closure of the canal at the end of the 1972