The Largest Dragline currently working in North America
is the Bucyrus Erie 2570WS, Known as Ursa Major.
Working at Thunder Basin Coal Company's Black
Thunder Mine, in the Powder River Basin of Wyoming, Ursa Major
carries a 160 CU-YD bucket on a 360Ft. boom. Weighing in at just
under 15 million pounds, the dragline has a suspended load rating
(weight of the bucket and it's contents) of a little under 700,000 pounds.