Clarendon Weir, Heritage-listed dam in Adelaide Hills, South Australia
The Clarendon Weir stands 14.6 meters tall on the Onkaparinga River, constructed with large blocks of Macclesfield marble, providing water to the Adelaide region.
Built between 1894 and 1896, the dam initially addressed Adelaide's sewer problems and later expanded its capacity with a height increase in the mid-1960s.
The dam represents a milestone in South Australian engineering, earning recognition on the South Australian Heritage Register for its historical and technical importance.
Located 20 kilometers south of Adelaide, the weir connects to Happy Valley Reservoir through a wooden tunnel system, supplying half of Adelaide's water needs.
The original construction process involved ponies and carts transporting materials for the wooden water tunnel, which still functions through gravity-based flow.
Location: South Australia
Elevation above the sea: 171 m
GPS coordinates: -35.11200,138.63500
Latest update: March 10, 2025 12:48
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