bridge and clearly intended for public presentation, that the bridge was substantially the work of the SRWSC. The involvement of the NSW Public Works Department is also implied by photographs of components fabricated by Charles Ruwolt and Sons held by Museum Victoria. It is therefore very likely that the New South Wales Public Works Department and Victorian State Rivers and Water supply commission were jointly responsible for the design and construction, as was the case with the Hume Dam itself. Bethanga Bridge is roughly contemporary with and is similar in design to the Yarrawonga Bridge at Lake Mulwala, which was designed by NSW Department of Main Roads Engineer Percy Allen and constructed in 1924, also as a result of the creation of an artificial lake on the Murray River. The other prominent engineers involved in the Hume Project, Ettore Checchi, Ernest deBurgh, and J. S. Detheridge, were water supply engineers or had ceased to be involved when the bridge was built. There was a pattern in NSW/Victoria relationships over the Murray River border for NSW to design Murray River bridges, and Victoria to built them. Other examples of the arrangement can be found in the Swan Hill bridge and many timber bridges. Bethanga Bridge is similar to other large NSW bridges such as the Hawkesbury bridges, and uncharacteristic of Victorian bridge design practice. The sequence of SRWSC lantern slides show the progressive construction of the Bethanga Bridge. Construction commenced in 1927 with clearance of the foundation sites and piling. By 1928 the piers were well under way and staging commenced from each bank. By 1929 all the piers were in place and waters had risen to the base of the piers. Erection of the trusses was underway. Falsework of underslung, divided Warren-type, metal trusses supported on three intermediate steel lattice towers, were used as staging for erecting the Pratt trusses. These were assembled in situ with the use of a travelling crane running across the falsework and hot riveting of preformed, punched and cut angle and flat section steel. As the permanent trusses were completed the staging was dismantled and moved on to the next span. Steel work for the bridge was fabricated at least in part, by Vickers Ruwolt of Burnley Melbourne. Photographs of components such as the truss members and bearings are in the collection of Museum Victoria. At least one of the main trusses was trial assembled