Swan Lake Gulch Proposed Mine

The Swan Lake Gulch Proposed Mine is a phosphorus-phosphates mine located in Caribou county, Idaho at an elevation of 7,700 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

Name: Swan Lake Gulch Proposed Mine  

State:  Idaho

County:  Caribou

Elevation: 7,700 Feet (2,347 Meters)

Primary Mineral: Phosphorus-Phosphates

Lat, Long: 42.63, -111.41030

Map: View on Google Maps

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Satelite image of the Swan Lake Gulch Proposed Mine

Swan Lake Gulch Proposed Mine MRDS details

Site Name

Primary: Swan Lake Gulch Proposed Mine


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


State: Idaho
County: Caribou
District: Trail Creek

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.
Administrative Organization: Caribou National Forest


Type: Federal Lease


Not available


Owner Name: U.S. Forest Service
Percent: 100.0
Info Year: 1978

Owner Name: Alumet Group
Percent: 100.0
Info Year: 1978
Years: 1975 -


Not available


Record Type: Site
Operation Category: Prospect
Operation Type: Surface
Discovery Method: Other
Years of Production:
Significant: N
Deposit Size: M


General Physiographic Area: Rocky Mountain System
Physiographic Province: Middle Rocky Mountains
Physiographic Detail: Aspen Range

Mineral Deposit Model

Not available






Type: R
Description: Trail Creek Syncline

Type: L
Description: Faults, Folds


Not available


Name: Shale
Role: Associated
Age Type: Host Rock
Age Young: Late Permian

Analytical Data

Analytical Data: RANDOM FLOAT SAMPLES AVG. 31.9 % P2O5
Analytical Data: SAMPLES FROM SECTION 17 AVG. 32 % P2O5
Analytical Data: RANDOM SAMPLES SECTION 29 RANGED 28 - 33.7 % P2O5


Unknown: Calcite
Unknown: Collophane
Unknown: Dolomite
Unknown: Feldspar
Unknown: Limonite
Unknown: Muscovite
Unknown: Quartz
Unknown: Sericite


Comment (Deposit): 161.6 Ft Thickness Phosphatic Shale Member ( Section 29 ); Thickness Above For 2 Ore Zones

Comment (Development): Swan Lake Gulch Proposed Mine On 1320 Acres ; Econ.Com: Average Stripping Ratio Would Be 7.4 : 1 (Cy Overburden: Cy Ore)

Comment (Workings): 2 Open Mine Pits Proposed With 45 Deg Slopes; E Pit Will Be 6000 Ft Long, 3400 Ft Wide, 350 Ft Deep; W Pit 4600 Ft Long, 1800 Ft Wide, 400 Ft Deep

Comment (Reserve-Resource): Item 1 Est. For Swan Lake Gulch Proposed Mine; Item 2 Est. For T 9 S, R 43 E In General

Comment (Location): Swan Lake Gulch Proposed Mine Includes Sections 15 , 22 , 27 ; Plotted In Section 22 ; Sections 17 , 29 Not In Proposed Mine But Are Included In This Deposit

Comment (Production): Production Scheduled To Begin In 2004 And End In 2028 ( USGS, 1975 )

Comment (Deposit): Deposit Also Located In Secs 15 And 27. EIS Project Involves Federal Phosphate Leases I-014958(400 Acres) And I-016079 (40 Acres). Deposit Not Scheduled For Production Before The Year 2000

Comment (Development): Minesite Is On The South End Of The Trail Creek Synccine Meade Peak Is 201 Ft Thick, Lower And Upper Ore Zones Total 59 Ft Thick-According To Eis Ore Will Be Mined In 2 Open Pits. East Pit Will Be 6000 Ft Long, 3400 Ft Wide, 350 Ft Deep. West Pit Will Be 4600 Ft Long, 1800 Ft Wide, 400 Ft Deep.

Comment (Ownership): Alumet Group Is Composed Of Earth Sciences Inc, National Steel Corp., And South Wire Company.

Comment (Workings): Minesite Will Have A High Aesthetic Impact, Much Of The Site Is In The Huckleberry Basin Roadless Area. 699 Acres Will Be Disturbed:300 For Pits, 234 For Dumps, 165 For Surface Facilities. 160 Men Will Be Employed.


Reference (Deposit): Mc Kelvey, V. E., And Others, 1953 , Stratigraphic Sections Of The Phosphoria Formation In Idaho, 1947 - 1948 , Part 1 : USGS Circ. 208 , 49 P.

Reference (Deposit): Powell, J. D., 1974 , Evaluation Of Phosphate Resources In Southeastern Idaho: Idaho Bureau Of Mines And Geology Inf. Circ. 25 , 33 P.

Reference (Deposit): USGS, 1975 , Development Of Phosphate Resources In Southeastern Idaho: Draft Environmental Impact Statement, V. 2 , Pt. 4.2 , P. 46 - 73

Reference (Deposit): Mansfield, G. R., 1927 , Geography, Geology, And Mineral Resources Of Part Of Southeastern Idaho: USGS Prof. Paper 152 , 453 P.

Reference (Deposit): Garrand, Leonard, 1975, Phosphate Study Southeastern Idaho For Us Forest Service

Reference (Deposit): Service, A.L., 1966, An Evaluation Of The Western Phosphate Industry And Its Resources, Part 3 Idaho, Us Bureau Of Mines Ri 6801

Reference (Reserve-Resource): Phosphate Resources In Southeastern Idaho,. USGS, Blm, U.S. Forest Service, 1977

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