The Tumut Junction Bridge located at the Junction of the Tumut and Goobagandra Rivers is one of five McDonald trusses remaining in NSW to date (one of which is no longer used by road traffic), and of these, it is ranked second in terms of its heritage significance. The bridge is the only existing triple span arrangement of the McDonald's truss, a seminal bridge type designed by a prominent local engineer who was part of an important and influential group of NSW Public Works Department Engineers. Junction Bridge was designed to make full use of Australian native hardwoods and it forms part of a group of bridge types that combine to illustrate the evolution of timber truss bridge design in Australia which, collectively, revolutionized the ability of the government to provide trafficable roads around NSW in the late nineteenth century.