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The initial full supply volume was 600 million gallons (2,727 megalitres), the spillway was raised in 1953, and the current full capacity is 9,500 megalitres. The dam was replaced as Mt Isa's primary water supply by Lake Moondarra following the completion of that dam in 1958. Rifle Creek Dam now serves as a backup water supply for Mt Isa Mines. [1]
Mount Isa's water is supplied from Lake Moondarra, 13 km (8.1 mi) from Mount Isa, and from Lake Julius, 60 km (37 mi) from Mount Isa. As it costs approximately twice as much to supply water from Lake Julius, the water is normally drawn from Lake Moondarra.
The dam was built for Mount Isa Mines and, at the time, was the largest water scheme in Australia financed by private enterprise. [1] The original construction was started by the American Utah Construction Company, but Thiess Brothers completed the project. [2] The lake includes picnic areas, pontoons, a ski jump, and water sports facilities.
MIM Holdings Limited was an Australian mining company created in 1970 [1] as the parent company of Mount Isa Mines Limited, which operates the Mount Isa mines in north-west Queensland. Based in Brisbane, the capital city of the Australian state of Queensland, MIM Holdings owned and/or operated coal, gold, and base metal mines in Australia and ...
It also, in 1958, constructed a new dam on the Leichhardt River to supply water to Mount Isa and the MIM operations [16] and thus Lake Moondarra was created. The Black Rock open cut began operating in March 1957 to produce copper ore. [26] Until 1963, the Black Rock open cut produced copper oxide ore that was used as a flux in the copper ...
Mount Isa is a reasonably affluent district. The largest industry in the city is the Mount Isa Mines, a source of lead, copper, silver and zinc. Cattle grazing and tourism are other industries of note. In the 2021 census, the City of Mount Isa had a population of 18,727 people. [1]
The Mount Isa Mine Experimental Dam (1920s) is the earliest surviving construction at Mount Isa and Mount Isa Mine, demonstrating the early development of Queensland's richest mining venture. The silted up dam remains as evidence of the vital need for storing water to enable mining operations to proceed.
The dam wall is located just below the junction of the Leichhardt River and Paroo Creek some 70 km (43 mi) North East of Mount Isa. With a catchment area of 4,845 km 2 (1,871 sq mi) it has a full supply capacity, at a supply level of 223.54m AHD, of 107,500 ML (3,800 × 10 ^ 6 cu ft), a surface area of 1,255 ha (3,100 acres) with an average ...