Northern Suburbs Ocean Outfall Sewer

Main

AuthorJohn MorcombeDateMarch 2026DescriptionDeep below Clontarf, Balgowlah Heights, Balgowlah, Fairlight and Manly runs a tunnel carved through solid rock that was part of a project that was hailed as an engineering marvel for its time. The tunnel is one of the main components of the Northern Suburbs Ocean Outfall Sewer, which was built between 1916 and 1933 to serve one-third of Sydney’s population.SubjectsSewerage PlantNorth Head (Manly, N.S.W.)CopyrightThis item may be used freely for research and study purposes, for all other uses contact Northern Beaches Council Library Local Studies. Please acknowledge that the item is courtesy of John Morcombe.

Start typing here to find a location	Latitude	Longitude	Zoom	Actions

loading google map....

Save Cancel

Menu

Northern Suburbs Ocean Outfall Sewer