The Eldorado Bar is a gold and silver mine located in Lewis and Clark county, Montana.
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.
Primary Mineral: Gold, Silver
Lat, Long: 46.73639, -111.85083
Map: View on Google Maps
MRDS mine locations are often very general, and in some cases are incorrect. Some mine remains have been covered or removed by modern industrial activity or by development of things like housing. The satellite view offers a quick glimpse as to whether the MRDS location corresponds to visible mine remains.
Eldorado Bar MRDS details
Primary: Eldorado Bar
County: Lewis and Clark
District: Missouri River Terraces
Owner Name: Watts Griffis And Mcouat (Wgm)
Home Office: Toronto, Canada
Years: 1994 -
Owner Name: American Gem
Years: 1994 -
Time Period: 1938 - 1944
Mined: 10000000.000 cy
Material type: gravel
Description: Cp_Grade: ^10 Million Cu Yds Gravel At 20 Cents/Yd
Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Years of Production:
Deposit Size: M
General Physiographic Area: Rocky Mountain System
Physiographic Province: Northern Rocky Mountains
Mineral Deposit Model
Form: RIVER SANDS AND GRAVELS
Age Type: Host Rock
Age Young: Holocene
Analytical Data: PER 100 LB OF CONCENTRATES, PT= 7.86 OZ, OS - IR= .56 OZ, PD= .42 OZ
Comment (Commodity): THE SAPPHIRES ARE NATURALLY PALE, BUT CAN BE HEAT-TREATED TO ACHIEVE A DEEPER BLUE COLOR.
Comment (Production): .006 OZ AU TON
Comment (Development): IN SEPTEMBER, 1994, WGM WAS CONDUCTING INITIAL TESTS FOR RENEWED SAPPHIRE MINING IN THIS AREA.
Comment (Workings): 10 MILLION CU YDS OF MATERIAL HANDLED IN 6.5 YEARS
Comment (Deposit): FROM 1992-1994, AMERICAN GEM ACQUIRED CONTROL OF MOST OF THE HISTORIC SAPPHIRE-PRODUCING AREAS IN MONTANA.
Comment (Reserve-Resource): RESOURCE WAS ESTIMATED FOR 260 ACRES OF THE 1200 ACRE PROPERTY.
Reference (Deposit): THE NORTHERN MINER, 1994, AMERICAN GEM PRODUCING SAPPHIRES IN MONTANA: V. 80, NO. 30, P. 1, 10, 11.
Reference (Production): MERTIE 1951, P. 80
Reference (Reserve-Resource): THE NORTHERN MINER, 1994.
Reference (Deposit): MERTIE, J.B., JR., ET AL, 1951, GEOL. CANYON FERRY, MONTANA: USGS BULL. 972, P. 79-80.