The Alma Placers is a gold and sand and gravel, construction mine located in Park county, Colorado.
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.
Mine Info
Elevation:
Commodity: Gold, Sand and Gravel, Construction
Lat, Long: 39.28194, -106.05361
Map: View on Google Maps
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Alma Placers MRDS details
Site Name
Primary: Alma Placers
Secondary: Alma Placer & Leaching Plant
Secondary: Alma Gold Placer
Commodity
Primary: Gold
Primary: Sand and Gravel, Construction
Location
State: Colorado
County: Park
District: Alma District
Land Status
Not available
Holdings
Not available
Workings
Not available
Ownership
Not available
Production
Not available
Deposit
Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Years of Production:
Organization:
Significant: N
Physiography
Not available
Mineral Deposit Model
Model Name: Placer Au-PGE
Orebody
Not available
Structure
Not available
Alterations
Not available
Rocks
Name: Alluvium
Role: Host
Age Type: Host Rock
Age Young: Holocene
Name: Glacial Sediment
Role: Host
Age Type: Host Rock
Age Young: Pleistocene
Analytical Data
Not available
Materials
Not available
Comments
Comment (Production): Several lessors worked parts of the placer in the 1930s. (USBM IC 7101)
Comment (Reserve-Resource): In 1949, 32 holes were drilled: gravel is 70' deep for a total of 750,000 yards, averaging $0.32/yd. (assuming $35/oz Au), with 4 paystreaks. One paystreak on bedrock ran ~$1/yd. (Sunshine files, 1961)
Comment (Production): Production from 1870 to 1960 totaled about 27,000 oz. of gold 825 fine. (Sunshine files, 1961.)
Comment (Production): Timberline Enterprises operated the placer and a gold recovery plant at Alma, 1977 to 1980. (CO DIV. MINES)
Comment (Commodity): Deposit was first worked for gold, but in recent years was worked for sand and gravel.
Comment (Deposit): OPEN CUT 110' LONG, DRIFT ; INFO.SRC : 1 PUB LIT
Comment (Deposit): Workings consist of trenching.
Comment (Location): Directly east of Alma, on east side of the South Platte River, mostly in the E/2 sec 12, T 9 S, R 78 W.
References
Reference (Deposit): PARKER, 1961, GOLD PLACERS OF COLO.
Reference (Deposit): Guiteras, J. R., 1940, Mining and milling methods and costs in the Alma district, Colorado: U.S. Bureau of Mines Information Circular 7101, 63 p.
Reference (Deposit): REVISED BY MILS USING CURRENT MSHA SHEETS 3-80
Reference (Deposit): USGS CRIB A002264
Reference (Deposit): COLO DIV OF MINES, A SUMMARY OF MINERAL ACTIVITIES IN COLO
Reference (Deposit): CONSV. DIV. COMP. DATE, 9,64
Reference (Deposit): Sunshine Mining Co. Colorado exploration files, unpublished data, Colorado Geological Survey.
Reference (Deposit): Singewald, Q. D., 1950, Gold placers and their geologic environment in northwestern Park County, Colorado: U.S. Geological Survey Bulletin 955-D, p. 103-172.
Reference (Deposit): COLO. STATE GEOLOGICAL SURVEY BULL. 3 PL. 1
Colorado Mining Photos
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