1910s: wooden tower. 1930s: 30' all-steel tower with L-4 cab. Current: 30' all-steel live-in tower. Manned.
Black Hills National Forest
12 miles northwest of Custer
Pennington County, South Dakota
Elevation 7166'

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Bear Mtn. in 1918 Bear Mtn. in 1941 Bear Mtn. in 2011
Photos courtesy the National Archives and Records Administration and Ron Kemnow