 The Sulphite Railroad Bridge is located about east of downtown Franklin, and about south of US Route 3, and crosses the river at a point where its banks are quite steep; it is not readily visible from any roadway, but may be seen from the Winnipesaukee River Trail.The bridge is long, and consists of three spans, each supported by Pratt trusses resting on granite piers or abutments.The main central span measures .