Hadley Bridge is a historic bridge that spans the Connecticut River between Hadley and Northampton. The bridge was built in 1902 and is one of the oldest surviving examples of a steel arch bridge in the state. The bridge has a total length of 1,200 feet and a width of 40 feet, and carries two lanes of traffic and a sidewalk. The bridge is listed on the National Register of Historic Places and is a local landmark for both towns. The bridge carries MA-9 across the river, where it connects to I-91.