Built of reinforced concrete by the Ferro-Concrete Company of Australasia Ltd, it is believed to have been the biggest arch bridge span of that type at that time. It utilises large 'false piers' on each side of the central arch, which give the appearance of strength in the classical masonry style, but are not required to be anywhere as massive, since the arch itself carries the full load via the thin vertical members. It resembles closely similar bridges of the period, specifically the Howard Taft Memorial Bridge in Washington DC Taft Bridge which took ten years to construct 1897-1907 (as opposed to the two years for Grafton Bridge).