The Penshurst Reservoirs are heritage-listed reservoirs located at Laycock Road, Penshurst in the Georges River Council local government area of New South Wales, Australia. They were designed and built during 1895 by the NSW Public Works Department. The reservoirs are also known as WS87 & R88, Penshurst Elevated Steel Reservoir No 2 and Penshurst Elevated Concrete Reservoir No 3. The property is owned by Sydney Water, an agency of the Government of New South Wales. The site was added to the New South Wales State Heritage Register on 18 November 1999. History In 1891 a cast iron elevated tank was constructed at Penshurst. Only the brick stand still survives. It was supplied with Upper Nepean Scheme water by a pumping station at Carlton. To augment supply, Penshurst Reservoir No. 1, a riveted steel surface reservoir, was constructed in 1895. By 1910, further growth in demand was met with the construction of the elevated Penshurst Reservoir No. 2 (WS87), a riveted steel elevated reservoir. Penshurst Tank was removed in 1914, first to Campbelltown and, in 1942, to Warragamba Township. The fourth reservoir, the elevated Penshurst Reservoir No. 3 (WS88), a large concrete elevated reservoir, was constructed in 1938. The elevated Penshurst Reservoir (WS87), built in 1910, is one of a group of four similar elevated reservoirs, the others being Bellevue Hill Reservoir (WS10), Drummoyne Reservoir (WS38), completed in 1910, and Ashfield Reservoir (WS3), completed in 1912. In the meantime, Lakemba Pumping Station took over supply for Penshurst in 1924, but also supplied Wiley Park and East Hills from 1930. Carlton pumping station continued in emergency service until decommissioned in 1939. Penshurst Reservoir No. 1 was removed in 1951 and re-erected at Newport. With plans to extend the Woronora Pipeline to the Metropolitan System, a Main was commenced in 1958 from Penshurst to Allawah. However, by 1961, it was realised that instead of Woronora supplying Sydney, the opposite would be the case, with Warragamba water supplementing areas supplied by Woronora. This situation required further amplification of the mains between the City Tunnel at Ashfield and the Penshurst Reservoirs, including a new main from the City Tunnel to Allawah, pumped by a new pumping station in Canterbury Park, together with a pumping station at Allawah to pump water to Penshurst. Completion of this scheme in 1969 allowed Warragamba water to be fed into the Woronora Pipeline in sufficient quantity to assist in the