As was the case with almost every desert mine ever worked, the Eldorado suffered from water shortages. Mining uses up a lot of water and there was no close, dependable source in the area. This problem was solved by building a nine-mile pipeline to Pinyon Well, which was completed in 1918. Pinyon Well was such an important asset in the area, that a pump tender actually lived at the well site, to keep the water flowing.

The Eldorado went dormant for a number of years after WWI, but was again redeveloped and worked from 1936 to 1938. The total gold production over the life of the mine is estimated at around 2,000 ounces (roughly $2.5 million at today's gold price).

The mine itself is situated on the north wall of a small canyon in the Hexie Mountains. A review in 1959 measured about 2,000 feet of drifts, shafts and minor crosscuts. The south side of the wash was home to the workers, as the remains of at least three buildings are present, as well as can dumps, stone foundations and outhouse debris.

The Eldorado contained both a stamp mill and a cyanide operation and provided custom milling work to the local mines nearby. Most of the mill was removed in 1941-42, probably as scrap for the war effort.

While there's not really much left at the Eldorado mine, compared to what it once was, it's still easy to spend a day there poking around what is left to see.