A relative latecomer, construction on this concrete base topped by a frame cab began in 1973 and wasn't completed until 1977. At last report it is still there.
Idaho Dept. of Lands
36 miles southeast of Pocatello
Bannock County, Idaho
Elevation 9167'
USGS Benchmark NT0605
USGS Benchmark NT0606

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Sedgewick Peak in 1974
Photo courtesy the Fire Lookout Museum