History and Construction
The construction of the Ord River Dam was completed in 1971 by the American Dravo Corporation. The dam was officially opened the following year. The dam is 335 metres long, and 98 metres high. The earth-fill only dam wall at Lake Argyle is the most efficient dam in Australia in terms of the ratio of the size of the dam wall to the amount of water stored. The lake was named after the property it partly submerged, Argyle Downs.
In 1996, the spillway wall was raised by 6 metres, which doubled the dam's capacity. Sediment flowing into the dam caused concerns in the mid 1990s that the dam's capacity could be dramatically reduced. By 2006 continual regeneration of the upper Ord catchment appeared to have reduced the amount of sediment inflow.
Read more about this topic: Lake Argyle
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