Centennial Phosphate Mine

The Centennial Phosphate Mine is a phosphorus-phosphates mine located in Beaverhead county, Montana at an elevation of 8,701 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.

Mine Info

Satelite View

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.

Site Name

Primary: Centennial Phosphate Mine
Secondary: Ruby Mine
Secondary: Troublesome Ridge Phosphate Deposit

Commodity

Primary: Phosphorus-Phosphates
Tertiary: Uranium
Tertiary: Vanadium
Tertiary: Fluorine-Fluorite

Location

State: Montana
County: Beaverhead

Land Status

Land ownership: National Forest
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 definitively identify property status, nor does it indicate claim status or whether an area is open to prospecting. Always respect private property.

Holdings

Type: Federal Lease

Workings

Not available

Ownership

Owner Name: Jr Simplot Fertilizer Division
Percent: 100.0
Home Office: Idaho
Info Year: 1978

Owner Name: USA Federal Phosphate Lease
Percent: 100.0
Info Year: 1978

Production

Not available

Deposit

Record Type: Site
Operation Category: Past Producer
Operation Type: Surface
Mining Method: Unknown
Years of Production:
Organization:
Significant: N

Physiography

General Physiographic Area: Rocky Mountain System
Physiographic Province: Northern Rocky Mountains

Mineral Deposit Model

Not available

Orebody

Not available

Structure

Not available

Alterations

Not available

Rocks

Not available

Analytical Data

Not available

Materials

Not available

Comments

Comment (Location): Political location in record is Beaverhead county, Montana. However, original lat/long plots 150 m inside adjacent Clark county, Idaho. Original coordinates were: lat/long NAD27 44-33-28N 111-41-18W (44.5578 -111.6883); UTM N4933840 E445331 Z12N; PLSS line# 1: Meridian- Montana Principal, TWNSHP 015 S, RNG 001 W, Sect 02, Sect_fract C N2. Recalculating the lat/long using WGS84 datum shifts the location to 44.55566 -111.6883, just inside Beaverhead county, but not centered on the workings. The center of the workings is at 44.5582 -111.69. The lat/long was changed to this location. The PLSS coordinates remain in agreement.

Comment (Deposit): DEPOSIT SAME AS IDAHO SEQUENCE NUMBER 0160330

References

Reference (Deposit): KAUFFMAN,1978,US BUMINES GRANT WORK

Reference (Deposit): US BUMINES MINERAL PROPERTY FILE 49.17-300010062

Reference (Deposit): JEMMETT, 1955, MS THESIS, UNIV. OF IDAHO,MOSCOW,IDAHO,67P

Reference (Deposit): 1957; MONTANA BUREAU OFMINES AND GEOLOGY IC 20

Reference (Deposit): GEOL.SURVEY OPEN FILE REPORT.

Reference (Deposit): STOOT,KOEHLER,1958,DIRECTORY OF KNOWN MINING ENTERPRISES

Reference (Deposit): CENTENNIAL RANGE,MONTANA-IDAHO,PHOSPHATE DEPOSITS:U.S

Reference (Deposit): HONKALA,F.S.,1953, PRELIMINARY REPORT ON GEOLOGY OF

Principal Gold Districts of Montana

In Montana, 54 mining districts have each have produced more than 10,000 ounces of gold. The largest producers are Butte, Helena, Marysville, and Virginia City, each having produced more than one million ounces. Twenty seven other districts are each credited with between 100,000 and one million ounces of gold production. Read more: Principal Gold Districts of Montana.