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Q&A What is this metal plate at the top of Mount Hoffman?

I hiked Mount Hoffman in Yosemite today and at the top there was this metal plate bolted to the rock with 4 metal rods welded to it. On the side you can also see some rivets so possibly there was s...

1 answer  ·  posted 5y ago by pbm‭  ·  last activity 4y ago by Charlie Brumbaugh‭

Question yosemite manmade-object-identification