19-727: The Henty Gold Mine is located at the head of the Henty River on the edge of the West Coast Range in Western Tasmania . It is approximately 30 km north of Queenstown . It is east of Zeehan and south of Rosebery . It can be reached by the Hydro -built road that passes between the Henty River and Tullah. Operations began in the 1990s. Its orebody and viability was ascertained from earlier exploration in
38-477: A site visit yesterday afternoon by the Tasmanian State Coroner and Tasmanian Police, it is with sadness that we acknowledge that the most likely outcome of our missing work colleague is that he is deceased." Police also confirmed the presumed death of 44-year-old Cameron John Goss in a statement released to media. Past production figures of the mine were: Henty River The Henty River
57-650: Is a perennial river in the West Coast region of Tasmania , Australia. The river generally lies north of Queenstown and south of Zeehan . Formed by the confluence of the Dobson and Newton Creeks, the river rises below Lake Newton on the western slopes of the Tyndall Range , northwest of Mount Tyndall , part of the West Coast Range of Tasmania. The river flows generally south by west and then west, joined by eight tributaries . The mouth emptying into
76-561: Is based on a series of structurally complex high-grade zones of gold mineralisation that occur within a package of highly altered volcanic rock adjacent to the Henty Fault. The Henty Gold Mine was operated by Barrick Gold – currently the largest gold producing company in the world, which acquired the mine through the takeover of Placer Dome in 2006. The Henty mine was expected to close on or before November 2009, with subsequent rehabilitation, due to depletion of ore reserves. Henty Gold
95-795: Is known as the Professor Plateau , west of the Professor Range to the north of the river, and the other Misery Flat , which is high ground between the Tully River and Lost Creek. The river basin is adjacent to the West Coast Range and the Lake Margaret areas, argued as having up to four separate periods of glaciation. The river is crossed by bridges that carry the Zeehan-Strahan Road and
114-672: The Southern Ocean at Henty Dunes. The river descends 264 metres (866 ft) over its 46-kilometre (29 mi) course . In the area known as the Upper Henty at the river's headwaters is the Henty Gold Mine . Its upper reaches were some of the last sites of dam making by the Hydro Tasmania in its long history of regulating flow of Tasmanian rivers. The river catchment has two areas of high ground. One
133-625: The Yolande River , located on the north side of Mount Sedgwick , in the West Coast Range , West Coast of Tasmania , Australia . The impounded reservoir is also called Lake Margaret. The dam was constructed in 1918 by the Mount Lyell Mining and Railway Company for the purpose of generating hydro-electric power via the Lake Margaret Power Station , which is located below the dam wall. Following
152-722: The Zeehan Highway . A former bridge that carried the Strahan-Zeehan Railway , very close to the coast and Ocean Beach , has since been demolished. During October and November, the Henty River is a location for sea run trout . Picnic spots are available beside the river at either the Strahan to Zeehan highway, or the Zeehan Highway. Lake Margaret, Tasmania Lake Margaret is a concrete-faced gravity dam with an uncontrolled spillway across
171-563: The Mount Lyell Mining and Railway Company commissioned seven conventional Pelton turbine generators with a capacity of 8.3 megawatts (11,100 hp ) at the Upper Lake Margaret Power Station. Hydro Tasmania took ownership of the power station in 1985. Water travels from Lake Margaret through a woodstave 2.2-kilometre (1.4 mi) pipeline to the power station. In 1931 a minihydro plant
190-450: The West Coast Range. Mount Sedgwick is to the south. The Bastion, at 1,107 metres (3,632 ft), which is a steep cliff face that is immediately west of Lake Magdala and north of Mount Geikie, together with Farquhar Lookout, with an elevation of 935 metres (3,068 ft), define a rough line of the northern part of the 21-square-kilometre (8.1 sq mi) catchment area . Numerous smaller lakes – some named and some not – lie above
209-560: The Yolande joins with the Langdon River , another West Coast Range west flowing river, to join with the Henty River west of the Zeehan Highway . The 170-hectare (420-acre) reservoir, also called Lake Margaret, with an elevation of 660 metres (2,170 ft) AHD , lies east of Mount Cyril, that has an elevation of 797 metres (2,615 ft), and south of Mount Geikie , that has an elevation of 1,191 metres (3,907 ft), both in
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#1732781189621228-653: The area during the 1970s when the priority was for other forms of mineralization within the Mount Read Volcanic Belt. Henty lies within the mineral rich Mt. Read Volcanic Belt in Western Tasmania that hosts the Hellyer, Que River, Rosebery, Hercules and Mount Lyell base metal deposits. The eastern side of the belt is dominated by the Henty Fault which runs north-east for over 60 kilometres between Mount Charter and Mount Read. The Henty operation
247-492: The area lies to the south east side of Mount Sedgwick and is known as Lake Beatrice . The initial purpose of Lake Margaret when it was constructed by the Mount Lyell Mining and Railway Company was to generate hydroelectric power for the Queenstown -based Mount Lyell mine, railway, and surrounding community. While the mine has since closed, the purpose of Lake Margaret to generate power remains unchanged. Between 1918 and 1930
266-458: The closure of the Mount Lyell Mining and Railway Company, in 1985 the control of the dam, lake, and power station was transferred to Hydro Tasmania . The dam, called Lake Margaret, was completed in 1918 and it was the first gravity dam constructed in Tasmania. It was built of concrete with conglomerate "plums". The dam wall is 17 metres (56 ft) high and is 243 metres (797 ft) long and
285-465: The concrete-faced dam wall has a volume of 6,000 cubic metres (210,000 cu ft). The uncontrolled spillway has a capacity of 29 cubic metres per second (1,000 cu ft/s ). In 1974 the dam wall was strengthened by the use of prestressed anchors and grouting of open joints. The Lake Margaret dam impounds the Yolande River, which also is the outflow from the dam. Further west
304-630: The location of the Lake Margaret. The vesting of the catchment with the current operator of the hydro electric power station, makes the two feeder parts of the catchment specific Hydro land in contrast to the surrounding landscape which is either in the Tyndall Regional Reserve or the Lake Beatrice Conservation Area. The two southern feeder Hydro reserves start from the slopes of Mount Sedgwick,
323-423: The mine was acquired by Catalyst Metals Ltd. On 23 January 2020 a mine worker was missing underground following a fall of ground at the mine. By the next day, it was reported as unlikely that he could have survived due to the amount of rock which had fallen. The mine was still unstable so only drones had been able to explore the rockfall. On 25 January, mining services company Pybar Mining Services stated "following
342-549: The westerly from Lake Barnables (less than one kilometre (zero point six two miles) east of Lake Margaret), then to Lake Phillip. The eastern feeder starts at an unnamed lake to Lake Polycarp, Lake Peter, Lake Paul, Lake Apollos, and then to Lake Phillip. The northern feeder starts from Lake Monica, Lake Myra, then Lake Magdala, situated at 782 metres (2,566 ft) AHD , Lake Martha, at 757 metres (2,484 ft), and Lake Mary, at 732 metres (2,402 ft), before flowing into Lake Margaret. The larger lower altitude natural lake of
361-541: Was acquired by Bendigo Mining mid-2009. Bendigo specialise in small scale operations and expect to extend the mine's life and also own the Kangaroo Flat Mine at Bendigo . The mine continued to operate under Bendigo, producing 43,178 ounces of gold in the 2009–10 financial year, after investing A$ 3.8 million into mining equipment for the mine. At stages of the mine's history, environmental monitoring studies were conducted on adjacent waterways. In January 2021,
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