Heritage and conservation register

At the time of opening it was believed to have been originally named Shelley Bridge after Mrs George Shelley, the wife of early Tumut settler George Shelley. This name appears to have disappeared from common usage until the 1950s when the grandson of Mrs Shelley requested that the bridge be officially named Shelley Bridge.

Timber truss road bridges have played a significant role in the expansion and improvement of the NSW road network. Prior to the bridges being built, river crossings were often dangerous in times of rain, which caused bulk freight movement to be prohibitively expensive for most agricultural and mining produce. Only the high priced wool clip of the time was able to carry the costs and inconvenience imposed by the generally inadequate river crossings that often existed prior to the trusses construction.

Timber truss bridges were preferred by the Public Works Department from the mid 19th to the early 20th century because they were relatively cheap to construct, and used mostly local materials. The financially troubled governments of the day applied pressure to the Public Works Department to produce as much road and bridge work for as little cost as possible, using local materials. This condition effectively prohibited the use of iron and steel, as these, prior to the construction of the steel works at Newcastle in the early 20th century, had to be imported from England. A series of five timber truss bridges were used. These included 1865 Old PWD, 1884 McDonald, 1894 Allan, 1899 de Burgh and 1905 Dare. Each was a technical improvement on its predecessor.

Timber truss bridges, and timber bridges generally were so common that NSW was known to travellers as the "timber bridge state".