Cool or Crazy? in Geocaching topics Posted November 16, 2006 NFA, I also have explored those old buildings being a 46er and all I been up there quite a bit. I would say a tank that size up on the hill there is VERY wierd. Its not like they needed a water source. Maybe chemical storage? They did use a lot of chemicals there when mining. I do have to say there are no other tanks located like that one anywhere around those buildings. FYI the town existed in the late 1800-early 1900s as a mining/logging area for metals like iron and titanium. Some of the titanium was used for paints on battleships. Once WWII was over there was no need for the mining there. some strip mining still goes on there but it is very very small.