downpipe. Internally there are exposed timber trusses arranged in a cruciform pattern framing the ventilation shaft. Walls are of painted picked sandstone with rubbed sandstone door and window dressings. There is a brick dwarf wall with a 1.8m cyclone fence surrounding three sides of the site, fourth side is bounded by a natural sandstone outcrop. There is a small brick toilet enclosure adjacent to the building. Immediate area around the Station has been covered in concreted and the property overlooks Iron Cove. It is substantially intact however several unsympathetic alterations have taken place. A new colourbond roof replaces an original slate roofing. In general, the fabric is marred by a lack of maintenance. The Station has been decommissioned. Heritage listing SPS 27 is of historic and aesthetic significance at the local and state level. Its historic value is derived from its original function which was to serve the Bondi Ocean Outfall Sewer (BOOS). The construction of the BOOS effectively ended the discharge of untreated sewage into Sydney Harbour. It is a rare example of the use of local sandstone as an architectural material in an industrial building designed by the Water Board, and was designed to lend stylistic continuity to the surrounding buildings in the Callan Park complex. In addition, the mechanical components housed within the building have potential industrial archaeological value. The Station is located within a small site adjacent to Eastern Park. The structure thus has a level of aesthetic value which is enhanced by its location in picturesque Iron Cove and contributes significantly to the visual catchment of the surrounding landscape. Sewage Pumping Station 27 was listed on the New South Wales State Heritage Register on 18 November 1999. See also References Bibliography Attribution New South Wales State Heritage Register Rozelle, New South Wales Sewerage infrastructure in Sydney Articles incorporating text from the New South Wales State Heritage Register Federation style architecture