Overview of Empire Mine State Historic Park Empire
The visible remains of the historic past-producing Idaho-Maryland Mine include the New Brunswick shaft and adjacent concrete rock silo.
In 1942 the mill at New Brunswick was modernized, new headframe was constructed, and new crusher plants, hoists and new compressors were installed. The upgrades gave the corporation one of the finest and most efficient plants in the County "This equipment was designed to handle 2,000 tons a day from depths of 5,000ft" (Pehrson & Needham, 1943). The New Brunswick shaft sinking was completed to 3,470ft (1,058m).
The Idaho-Maryland Mine Property includes two parts of fee simple land, the Idaho Land and the Brunswick Land. The Idaho Land represents 56 acres (23 hectares) in Nevada County near Grass Valley, CA.
The Mill Site Property, located directly adjacent the Brunswick Land, represents 82 acres (33 hectares) fee simple land. The Mill Site property has a leveled area of approximately 40 acres and an ~4 acre settling pond.
The Idaho-Maryland Mine Property includes two parts of fee simple land, the Brunswick Land and the Idaho Land. The Brunswick Land represents 37 acres (15 hectares) in Nevada County near Grass Valley, CA.
The photo shows the Brunswick shaft and concrete rock silo with the Mill Site Property in the background. Photo looking southeast.
Mill Site Property, including ~4 acre settling pond, shown in the foreground. Brunswick Land, with Brunswick shaft and concrete rock silo, in the background.
Brunswick Land; view looking northwest with Grass Valley in the distance.
Mine is located approximately 2 miles from the Idaho-Maryland Mine. An estimated 5.8M oz gold was produced from the Empire Mine during its operation from 1850 to 1956.