supply of Sutherland, Cronulla and beyond. Description Penshurst Reservoir (WS87) is one of a group of four similar elevated reservoirs, the others being Bellevue Hill Reservoir (WS10), erected in 1910, Drummoyne Reservoir (WS38),erected in 1910, and Ashfield Reservoir (WS3), erected in 1912. Each reservoir is an elevated cylindrical riveted steel tank, resting on a concrete apron and supported on a steel girder frame. The perimeter of the steel stand has a façade of concrete columns and arches, which forms a decorative, rather than a structural feature. The walkway around the rim of the reservoir has been removed. Standard features include a handrail in tubular steel, davit, access ladder, depth gauge board, inlet and outlet valve chambers. The full service level is and the reservoir has a capacity of . The Penshurst Reservoir Site also includes the former Water Service Officer's Cottage, the concrete base of Penshurst Reservoir No. 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. Modifications and dates The reservoir has been roofed to safeguard water quality (1977). Heritage listing As at 2 May 2005, the Penshurst Reservoirs (WS87 and WS88) are one of a small group of four similar elevated reservoirs in the Sydney Water system, the others being Bellevue Hill Reservoir (WS10), erected in 1910, Drummoyne Reservoir (WS38), erected in 1910, and the Ashfield Reservoir (WS 3), erected in 1912. The group of reservoirs demonstrates a high level of engineering expertise and architectural detail, accommodating both structural requirements and aesthetic qualities. Penshurst Reservoirs and Site demonstrates the rapid growth in demand for water in Sydney's southern suburbs as well as exhibiting a wide range of reservoir construction technology. It is the key site connecting Woronora and Warragamba water supply since 1942. The site has been in continuous use for water supply since 1891, over 100 years. Penshurst Reservoir (WS88) is the largest elevated reinforced concrete reservoir in the Sydney Water Supply System. Penshurst Reservoirs was listed on the New South Wales State Heritage Register on 18 November 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. Penshurst Reservoirs and