Ursa Major (excavator)
Largest dragline excavator in use in North America / From Wikipedia, the free encyclopedia
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The Ursa Major (lit. Great Bear) at Black Thunder Coal Mine, Wyoming, is the largest dragline excavator currently in use in North America and the third largest ever built.[1][2] It is a Bucyrus-Erie 2570WS model and cost US$50 million. The Ursa Major was one of five large walking draglines operated at Black Thunder, with the next two largest in the dragline fleet being Thor, a B-E 1570W - which has a 97.5-metre (320 ft) boom and a 69-cubic-metre (2,400 cu ft) bucket - and Walking Stick, a B-E 1300W with a 92-metre (302 ft) boom and a 34-cubic-metre (1,200 cu ft) bucket.[1]
Quick Facts Class overview, History ...
Ursa Major in 2009 | |
Class overview | |
---|---|
Name | 2570-WS Ursa Major |
Builders | Bucyrus-Erie |
Operators | United States |
Cost | US$50 million (1999) |
In service | 2001-Present |
Planned | 1 |
Completed | 1 |
Active | 1 |
History | |
United States | |
Name | Ursa Major |
Builder | Bucyrus-Erie |
Laid down | 1999 |
Launched | 2001 |
Christened | 2001 |
Commissioned | 2001 |
Notes | Largest walking dragline currently in-service |
General characteristics | |
Class and type | Model 2570-WS-series Dragline excavator |
Tonnage | 6,700 tonnes (7,385 short tons) |
Length | 110 m (360 ft) (boom) |
Propulsion | 2x hydraulically driven walker feet |
Speed | 0.16 km/h (0.1 mph) |
Capacity | Blade capacity: 160 cubic yards (120 m3) |
Complement | 5 |
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