Completion of this scheme in 1969 allowed Warragamba water to be fed into the Woronora Pipeline in sufficient quantity to assist in the supply of Sutherland, Cronulla and beyond.

The perimeter of the steel stand has a façade of concrete columns and arches, which forms a decorative, rather than a structural feature.

Standard features include a handrail in tubular steel, davit, access ladder, depth gauge board, inlet and outlet valve chambers.

1, the brick stand for Penshurst Tank (1891), valves and pipework associated with the connection in 1942 of the Woronora supply with Upper Nepean System water and a number of skid huts (3 in total).

Significant plantings around the site include cypress, viburnum, jacaranda, camphor laurel, oleander and native species.

The group of reservoirs demonstrates a high level of engineering expertise and architectural detail, accommodating both structural requirements and aesthetic qualities.

[1] Penshurst Reservoirs was listed on the New South Wales State Heritage Register on 18 November 1999 having satisfied the following criteria.

[1] The place is important in demonstrating aesthetic characteristics and/or a high degree of creative or technical achievement in New South Wales.

[1] The place has potential to yield information that will contribute to an understanding of the cultural or natural history of New South Wales.

The group of reservoirs demonstrates a high level of engineering expertise and architectural detail, accommodating both structural requirements and aesthetic qualities.

[1] The place possesses uncommon, rare or endangered aspects of the cultural or natural history of New South Wales.