In 1928 the Los Angeles County Forestry Department constructed a fire lookout in the western high point of Blue Ridge but it stood only for 2 years as the forest service decided it would be best to move it to a location in the Santa Monica Mountains (to Bodel Peak). So the structure and history was only here briefly. The site is a location for towers today and may have been next to the Frost benchmark at 8484 feet. There are concrete footings next to the site that may have been the place of the lookout.
Four concrete footings on the Blue Ridge site
Closer look on the footings
Toppled Frost Benchmark
Frost Benchmark from 1930