December 31, 1926: The Bourne Highway Bridge over the Cape Cod Canal opened in May 1911. The limitations of the narrow horizontal and vertical clearance — even with the sides in the upright position — made navigation challenging. It was the site of frequent ship collisions. On June 23 1935, the new Bourne Bridge opened and the old Sagamore bridge continued in use until midnight of the same day. Work of razing the old bridges began the next morning.