 The environs of the reservoir and hence this listing also include a wide range of items, which relate to later amplification of water supply.These include examples of 1920s and 30s pumping stations, a residence, and the 72" (1,800 mm) main, constructed between the Upper Canal and Pipe Head in 1937.Later items associated with the Warragamba Supply Scheme and more modern developments include several more recent pumping stations, screening and boosting plants on the eastern and southern sides of the Reservoir, and the 84 inch (2,100 mm) water main from Prospect, to Pipe Head, completed in 1958.