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Melbourne’s main outfall sewer: an engineering achievement of the 1890s

Abstract The 25 kilometre long, brick and concrete Main Outfall Sewer carried sewage from the Spotswood pumping station to the Werribee sewerage treatment farm. The now disused Main Outfall Sewer was a vital link in the 1890s sewerage system of Melbourne, Australia, the largest single civil engineering project undertaken in Victoria until that time and an important artefact of the process of development of Melbourne into a modern metropolis. It is also a tangible link with the formation of the Melbourne and Metropolitan Board of Works whose infrastructure role in Melbourne is of enormous historical importance.