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Concept
Telford Cut
Résumé
Telford Cut was an open-cut coal mine, now closed, in the Leigh Creek Coalfield in South Australia. For the 72 years between its opening in 1943 and its closure, the mine supplied sub-bituminous coal to fire power stations first in Adelaide then, from 1954, Port Augusta. Production ceased in November 2015 but stockpiled product was transported to Port Augusta until the last power station closed down in May 2016.
The open cut mine operation extracted low-grade, sub-bituminous coal that was transported 250 km by rail to power stations outside Port Augusta on the east side of Spencer Gulf. The coal occurs in several nested bowl-shaped seams, each several metres thick. The coalfield at Leigh Creek was operated at first by the Electricity Trust of South Australia then by Alinta Energy, and produced over 2.5 million tonnes a year of coal. Alinta energy also operated the power stations at Port Augusta; they were the last coal-fired electricity generators in South Australia, and the only users of coal from Leigh Creek.
In 1888, John Henry Reid discovered coal-bearing shale during the sinking of a railway dam in the Leigh Creek area (Henry Brown, Government Geologist confirmed the find in his visit to Leigh's Creek in February 1889). This discovery led to a geological examination of the area by a government geologist and the establishment of underground workings. No 1 shaft, sunk by the Leigh Creek Coal Mining Company, was abandoned on striking a heavy flow of water. A new shaft was sunk in 1892 but only small quantities of coal were extracted for experimental purposes and operations ceased in 1894.
It was not until 1940 when coal supplies became critically low because of the Second World War that Leigh Creek coal was considered again. The deposits seemed extensive and extracting the coal by open cut methods was considered feasible. Exploratory boring started in 1941 and plans were made to develop the first open cut mine. Excavation started in 1943 under the control of the Engineering & Water Supply Department.
Source officielle
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