Potts Hill Reservoirs 1 and 2

The twin reservoirs feature distinctive engineering characteristics, with Reservoir 1 utilizing earthen banks and clay cores, while Reservoir 2 incorporates mass concrete walls.

Construction of the first reservoir began in 1887 as part of the Upper Nepean Scheme, followed by the second reservoir in 1923 to meet Sydney's growing water needs.

The reservoirs supported migrant worker camps from 1948 to 1955, housing European laborers who contributed to the City Water Tunnel construction after World War II.

The facilities continue to serve as essential water storage infrastructure for the greater Sydney metropolitan area, managed by Sydney Water Corporation.

The site housed the Potts Hill Radiophysics field station from 1948 to 1962, conducting research with various antennas and telescopes for Australian radio astronomy.

Location: New South Wales

GPS coordinates: -33.89360,151.03270

Latest update: March 6, 2025 01:58