The Dorsey and Ridge Claims is a chromium mine located in Nevada county, California at an elevation of 2,119 feet.
About the MRDS Data:
All mine locations were obtained from the USGS Mineral Resources Data System. The locations and other information in this database have not been verified for accuracy. It should be assumed that all mines are on private property.
Elevation: 2,119 Feet (646 Meters)
Primary Mineral: Chromium
Lat, Long: 39.19167, -121.12806
Map: View on Google Maps
Dorsey and Ridge Claims MRDS details
Primary: Dorsey and Ridge Claims
District: Wolf Creek Area
Land ownership: Private
Note: the land ownership field only identifies whether the area the mine is in is generally on public lands like Forest Service or BLM land or if it is in an area that is generally private property. It does not indicate a claim status and does not necessarily indicate an area is open to prospecting.
Owner Name: L. V. Dorsey And D. R. Ridge
Record Type: Site
Operation Category: Occurrence
Operation Type: Unknown
Discovery Year: 1917
Years of Production:
General Physiographic Area: Pacific Mountain System
Physiographic Province: Cascade-Sierra Mountains
Physiographic Section: Sierra Nevada
Mineral Deposit Model
Comment (Production): OPERATORS REPORTED THAT IN 1918 54 LONG TONS OF ORE CONTAINING 30 TO 45 PERCENT CR2O3 HAD BEEN MINED BUT NOT SHIPPED. IT IS NOT KNOW WHETHER ANY OF THIS ORE WAS SHIPPED AT A LATER DATE. WHEN INSPECTED IN 1918 IT WAS REPORTED THAT 50 LONG TONS OF ORE HAD BEEN MINED AND PERHAPS 25 TONS REMAINED UNMINED.
Comment (Workings): NUMEROUS SMALL PITS ON OUTCROPS; SHAFT 12 FT. DEEP.
Comment (Deposit): FOUR CHROMITE CLAIMS, 80 ACRES. ORE IN THE OUTCROPS WAS TOO LOW IN GRADE TO SHIP. THE SHAFT OPENED THE LENS OF MORE MASSIVE ORE WHICH WAS SAID TO CONTAIN 40 TO 52 PERCENT CR2O3.
Reference (Deposit): CALIF. JOUR. MINES & GEOLOGY, V. 37, NO. 3, JULY 1941, P. 449
Reference (Deposit): D.O.M. BULL. 134, PT. III, CHAP. 5, P. 247, PL. 13