Big Muskie

Big Muskie

Big Muskie in February 1999
Class overview
Name	4250-W Big Muskie (1969-1999)
Builders	Bucyrus-Erie
Operators	United States
Cost	US$25 million (1969)
In service	1969-1991
Planned	1
Completed	1
Retired	1
History
United States
Name	Big Muskie
Builder	Bucyrus-Erie
Laid down	1967
Launched	1969
Christened	1969
Commissioned	1969
Fate	Retired in 1991 Scrapped in 1999
Notes	Largest walking dragline ever built
General characteristics
Class and type	Model 4250-W-series Dragline excavator
Tonnage	12,247 t (13,500 short tons)
Length	148 m (487 ft)
Beam	46 m (151 ft)
Height	68 m (222 ft)
Installed power	18 x 735.5 kW (1,000 hp) drives[1] 10 x 466 kW (625 hp) DC electric motors[1] Total: 18.04 MW (24,192 hp) supplied via trailing cable, total 13,800 volts of electrical power
Propulsion	2x hydraulically driven walker feet
Speed	0.16 km/h (0.1 mph)
Capacity	Blade capacity: 220 cubic yards (168.2 m3) or 325 short tons (295 t)
Complement	5[1]

Big Muskie was a dragline excavator built by Bucyrus-Erie and owned by the Central Ohio Coal Company (formerly a division of American Electric Power), weighing 13,500 short tons (12,200 t) and standing nearly 22 stories tall. It mined coal in the U.S. state of Ohio from 1969 to 1991. It was dismantled and sold for scrap in 1999.