Register on 25 June 1999 having satisfied the following criteria. The place is important in demonstrating the course, or pattern, of cultural or natural history in New South Wales. The bridge is one of the most remarkable feats of bridge construction. At the time of construction and until recently it was the longest single span steel arch bridge in the world and is still in a general sense the largest. Bradfield Park North (Sandstone Walls) "The archaeological remains are demonstrative of an earlier phase of urban development within Milsons Point and the wider North Sydney precinct. The walls are physical evidence that a number of 19th century residences existed on the site which were resumed and demolished as part of the Sydney Harbour Bridge construction". The place is important in demonstrating aesthetic characteristics and/or a high degree of creative or technical achievement in New South Wales. The bridge, its pylons and its approaches are all important elements in townscape of areas both near and distant from it. The curved northern approach gives a grand sweeping entrance to the bridge with continually changing views of the bridge and harbour. The place has a strong or special association with a particular community or cultural group in New South Wales for social, cultural or spiritual reasons. The bridge has been an important factor in the pattern of growth of metropolitan Sydney, particularly in residential development in post World War II years. In the 1960s and 1970s the Central Business District had extended to the northern side of the bridge at North Sydney which has been due in part to the easy access provided by the bridge and also to the increasing traffic problems associated with the bridge. The place has potential to yield information that will contribute to an understanding of the cultural or natural history of New South Wales. Bradfield Park North (Sandstone Walls) "The archaeological remains have some potential to yield information about the previous residential and commercial occupation of Milsons Point prior to the construction of the Sydney Harbour Bridge transport link". Engineering heritage award The bridge was listed as a National Engineering Landmark by Engineers Australia in 1988, as part of its Engineering Heritage Recognition Program. See also Australian landmarks List of the largest arch bridges References Bibliography Four papers on the design and construction of the bridge in volume 238 of the Minutes of Proceedings of the Institution