Mining in the Soledad Canyon region took off in the 1870s with new gold discoveries in the Acton area and the completion of the Southern Pacific Railroad. A new mining district, the Cedar, was created in the Acton area. Most of the gold ever recovered in Los Angeles County came from the Soledad Mines!
Between Acton and Ravenna, the Emma Consolidated Mining Company held the Emma, Bullion, Pacific, and London mines. These were reported to be silver and copper ore claims. The Emma is located on the south side of Parker Mtn. It has been reported inactive since 1900 except for brief ventures in 1926 and 1944.
Hugh Blanchard had measured the mine at 312 ft and the annex at 278 feet. There are two additional entrances that I was able to locate that have been buried and/or sealed for good.