the crest house and lower valve house in the Inter War Stripped Classical style were prepared by the engineers of the Water Board. The architectural detailing evokes a sense of monumentalism that is ideally suited to the context of a dam, and is not exhibited elsewhere on this scale. 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 dam wall and spillway is recognised by the National Trust of Australia (NSW) as being a place which is part of the cultural environment of Australia, which has aesthetic, historical, architectural, archaeological, scientific, social significance for future generations, as well as for the present community of New South Wales. The Woronora Dam is recognised by the Heritage Council of N.S.W. as a place which is of significance to New South Wales in relation to its historical, scientific, cultural, social, archaeological, natural and aesthetic values. The grounds of the Dam are likely to be associated by members of the community with the construction township, in particular for the period of the Great Depression when considerable numbers of families who resided at the place during those turbulent years. The place has potential to yield information that will contribute to an understanding of the cultural or natural history of New South Wales. The dam wall is an excellent late example of gravity dam construction in the Inter-war era in incorporating inspection galleries, contraction joints, and ground surface drainage system which demonstrate the principal characteristics of this technology at the time. The use of mass concrete in the upper section of the wall is likely to represent a major innovation in terms of dam construction technology at the time. The terraces and platforms adjoining the dam wall abutments demarcate the location of plant and equipment used in the construction of the Dam, in particular the location of the cableway head towers, and concrete mixing plant, which may potentially provide further insight into Inter-war era construction practices. The hillside near the upper picnic area and area alongside the road of access were the sites of the original construction township. These areas retain a road formation, drainage lines, concrete platforms and dry packed walls from that era. The integrity is such that collectively these features may potentially provide further insight into the lifestyles of the employees that constructed the Dam. The