Wall Street Mill

The Wall Street Mill in Joshua Tree National Park was a complete and operable gold ore crushing mill featuring late-19th century two-stamp mill machinery. Consequently, the significance encompasses the mill machinery, the building which houses it, the well which supplied water for the mill's operation, and the well pump. It is the only gold ore crushing mill in the region that retains integrity.

The stamp mill building is framed with heavy timber and built on a downward sloping hillside to take advantage of gravity in the milling process. The roof and some of the exterior walls are covered with corrugated sheet metal, while some of the exterior walls have either vertical or horizontal wooden siding.

Source: Wikipedia