Mica Mountain (LO site), Pima County, Arizona, Elevation = 8664 ft.

Located in the Saguaro National Park

The summit of Mica Mountain had a 100 ft. Aermotor tower with 7 ft. square cab which was built in 1938. I do not know when it was removed. The footings for the base are all that remain. Photo taken March 29, 2019.
Sign at the summit area.
This benchmark called Rincon Tower was located at the summit. The only datasheet found is for the tower and it is dated 1946 and has a different name. Datasheet: CZ1813