Fossil Mammals from Caves of Black Hills, SD

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An 1850 lb wench (left) was used for entrance/exit from the cave as well as removal of cave matrix. A secondary rope line with emergency brake was used as backup to the wench.
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An 1850 lb wench (left) was used for entrance/exit from the cave as well as removal of cave matrix. A secondary rope line with emergency brake was used as backup to the wench.