1. Mineral Resources
  2. Online Spatial Data
  3. Mineral Resource Data System (MRDS)

Henry Phosphate Mine

Past Producer in Caribou county in Idaho, United States with commodities Phosphorus-Phosphates, Vanadium, Fluorine-Fluorite, REE, Uranium
Map
XML
JSON
KML
A
Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Public Land Survey System information
  6. Commodities
  7. Materials information
  8. Mineral occurrence model information
  9. Host and associated rocks
  10. Nearby scientific data
  11. Geologic structures
  12. Ore body information
  13. Controls for ore emplacement
  14. Economic information about the deposit and operations
  15. Mining district
  16. Mineral rights holdings
  17. Land status
  18. Ownership information
  19. Production statistics
  20. Reserves and resources
  21. Workings at the site
  22. Links to other databases
  23. Bibliographic references
  24. General comments
  25. Reporter information

Geologic information

Identification information

Deposit ID 10289725
MRDS ID W026182
MAS/MILS ID 0160290055
Record type Deposit
Current site name Henry Phosphate Mine
Alternate or previous names North Henry, Central Henry, South Henry, North Wooley Range, Lanes Creek NW, Area A, 1-7, Lower Valley, Area B, 2-6, Henry NE, Area A, 2, 3, 4

Geographic coordinates

Point of reference Ore Body
Geographic coordinates: -111.47322, 42.87621 (WGS84)
Elevation 2057
Location accuracy 10(meters)
Relative position Center of pit that has been reclaimed. Total working for Henry are about 3.5 miles long in NNW direction. This does not include the Henry North Continuation from which it is separated by about 0.35 miles. Henry North is over 1 mile long.

Site location context

Political divisions (FIPS codes)

Caribou(county)

Idaho(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Wayan West(quadrangle 1:24,000 scale)

Soda Springs(quadrangle 1:100,000 scale)

Preston(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Blackfoot(hydrologic unit)

Upper Snake(hydrologic accounting unit)

Upper Snake(hydrologic subregion)

Pacific Northwest(hydrologic region)

Federal lands

ST(Federal land areas administered by ST)

Geographic areas

Country State County
United States Idaho Caribou

Public Land Survey System information

Meridian Township Range Section Fraction State
Boise 006 S 042 E 24 NWSESE Idaho

Comments on the location information

  • Parts Of Sections 31 , 32 Of T 6 S, R 43 E Are Also Included In Henry Mine; Mine Plotted In T 6 S, R 43 E, Section 19 , Proposed Henry North Mine Would Be Located In T 6 S, R 42 E, Sections 10 , 11 , 14

Commodities

Commodity Importance
Phosphorus-Phosphates Primary
Vanadium Critical Secondary
Fluorine-Fluorite Critical Tertiary
REE Critical Tertiary
Uranium Tertiary

Materials information

Materials Type of material
Chalcedony Unknown
Collophane Unknown
Dolomite Unknown
Kaolinite Unknown
Limonite Unknown
Montmorillonite Unknown
Orthoclase Unknown
Pyrite Unknown
Quartz Unknown
Sericite Unknown

Analytical data

Result 92 SAMPLES OF PHOSPHATIC SHALE IN SECTION 24 GAVE 36.3 % P2O5 MAX

Mineral occurrence model information

Model code 243
USGS model code 34c
Deposit model name Phosphate, upwelling type

Host and associated rocks

  • Host or associated Host
    Rock type Sedimentary Rock > Carbonate > Limestone
    Rock unit name Phosphoria Formation
  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Shale
    Rock type qualifier Phosphatic
    Rock unit name Phosphoria Formation
  • Host or associated Host
    Rock type
    Rock unit name Phosphoria Formation
    Stratigraphic age (youngest) Late Permian
  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Siltstone
  • Host or associated Host
    Rock type Sedimentary Rock > Carbonate > Dolomite
  • Host or associated Host
    Rock type Sedimentary Rock > Chemical Sediment > Chert
    Rock unit name Phosphoria Formation
  • Host or associated Associated
    Rock type Sedimentary Rock > Carbonate > Limestone
    Rock unit name Wells Formation
  • Host or associated Associated
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Sandstone
    Rock unit name Wells Formation
  • Host or associated Associated
    Rock type Sedimentary Rock > Carbonate > Limestone
    Rock unit name Brazer Limestone
  • Host or associated Associated
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Shale
    Rock unit name Brazer Limestone
  • Host or associated Associated
    Rock type Sedimentary Rock > Chemical Sediment > Chert
    Rock unit name Brazer Limestone

Nearby scientific data

Ore Body (1) -111.47322, 42.87621
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure name Lanes Butte Syncline
Type of structure Regional
Structure name Georgetown Syncline
Type of structure Regional
Structure name Snowdrift Anticline
Type of structure Regional
Structure name Wooley Valley Anticline

Ore body information

  • General form TABULAR, SEDIMENTARY
    Strike N45W
    Dip 60E
    Thickness 19.3M
    Length 2268M
    Width 45M
    Area 910HA
    Depth to top 20M
    Field Value
    MAS Matrix # 1
    MAS Column # 1
    Type of Orebody #1 SEDIMENTARY
    Shape of Orebody #1 TABULAR
    Primary mode of Origin SEDIMENTATION
    Secondary mode of Origin RESIDUAL CONCENT
    Primary Ore Control BEDDING
    Secondary Ore Control LITHOLOGY
    Degree of Wallrock Alter. NONE
    Type of Wallrock Alter. #1 OTHER
    Strike And Dip N45W:60E
    Minimum Depth to Top 0
    Avg. Thick. Unconsol. Mat. 1
    Min. Thick. Unconsol. Mat. 0
    Date of Last Modification 840920
  • General form TABULAR, SEDIMENTARY
    Strike N45W
    Dip 60E
    Thickness 19.3M
    Length 1981M
    Width 34M
    Area 910HA
    Depth to top 15M
    Field Value
    MAS Matrix # 1
    MAS Column # 2
    Type of Orebody #1 SEDIMENTARY
    Shape of Orebody #1 TABULAR
    Primary mode of Origin SEDIMENTATION
    Secondary mode of Origin RESIDUAL CONCENT
    Primary Ore Control BEDDING
    Secondary Ore Control LITHOLOGY
    Degree of Wallrock Alter. NONE
    Type of Wallrock Alter. #1 OTHER
    Strike And Dip N55W:60E
    Minimum Depth to Top 0
    Avg. Thick. Unconsol. Mat. 1
    Min. Thick. Unconsol. Mat. 0
    Date of Last Modification 840917

Comments on the ore body information

  • Orebody is in an outcrop

Controls for ore emplacement

  • Bedding
  • Structure

Comments on the geologic information

  • Carbonate Fluorapatite, Quartz, Illite, Crandallite, Kaolinite At Leached Surface; Phosphate, Deposited In Limestone On West Flank Of Rising Dome In Middle Ordovician. Weathering In Modern Cycle Has Leached Carbonate, Forming A Phosphate-Enriched Residuum. Surface Weathering, When Continued, Forms Some Aluminum Phosphate Mineral (Crandallite) And Forms Kaolinite

Economic information about the deposit and operations

Operation type Surface
Development status Past Producer
Commodity type Both
Significant Yes
Mining method Open Pit
Year of first production 1969
Year of last production 1983
Plant type Beneficiation (Mill)
Plant subcategory Gravity
Milling method Washing

Mining district

District name Blackfoot River District
District name SE Idaho Phosphate District

Mineral rights holdings

Type of mineral rights Federal Lease
Type of mineral rights State Lease
Type of mineral rights Fee Ownership

Land status

Ownership category State

Ownership information

  • Type Owner-Operator
    Owner Monsanto Chemical Intermediates Co.
    ID 1000091
    Interest 100
    Home office SODA SPRINGS\nID 83276
    Year 1984
    First year 1979
  • Type Operator
    Owner Dravo Corp & N A Degerstrom, Inc.
    ID 1000091
    Home office Washington
    Year 1984
  • Type Operator
    Owner Dravo-Soda Springs
    ID 1000091
    Home office SODA SPRINGS\nID 83276
    Year 1984
    Last year 1979

Comments on the ownership information

  • Other Part Owners: N.A. Degerstrom Inc. Dravo Corporation

Production statistics

  • Year 1969
    Description Phosphate Rock 24.0 % P205 642000 Tonnes Of Ore Per Year
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major P2O5 Ore Phosphorus-Phosphates Phosphorus 642000mt
  • Year 1970
    Description Phosphate Rock 26.5 % P205 663000 Tonnes Of Ore Per Year
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major P2O5 Ore Phosphorus-Phosphates Phosphorus 663000mt 27wt-pct
  • Year 1971
    Description Phosphate Rock 27.4 % P205 794000 Tonnes Of Ore Per Year
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major P2O5 Ore Phosphorus-Phosphates Phosphorus 794000mt 27wt-pct
  • Year 1972
    Description Phosphate Rock 27.0 % P205 860000 Tonnes Of Ore Per Year
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major P2O5 Ore Phosphorus-Phosphates Phosphorus 860000mt 27wt-pct
  • Year 1973
    Description Phosphate Rock 28.0 % P205 926000 Tonnes Of Ore Per Year
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major P2O5 Ore Phosphorus-Phosphates Phosphorus 926000mt 28wt-pct
  • Year 1974
    Description Phosphate Rock 27.8 % P205 1052000 Tonnes Of Ore Per Year
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major P2O5 Ore Phosphorus-Phosphates Phosphorus 1052000mt 28wt-pct
  • Year 1975
    Description Phosphate Rock 27.6 % P205 859000 Tonnes Of Ore Per Year
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major P2O5 Ore Phosphorus-Phosphates Phosphorus 859000mt 28wt-pct
  • Year 1976
    Description Phosphate Rock 27.4 % P205 913000 Tonnes Of Ore Per Year
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major P2O5 Ore Phosphorus-Phosphates Phosphorus 913000mt 27wt-pct
  • Year 1977
    Description Phosphate Rock 27.8 % P205 632000 Tonnes Of Ore Per Year
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major P2O5 Ore Phosphorus-Phosphates Phosphorus 632000mt 28wt-pct
  • Year 1978
    Description Phosphate Rock 27.3 % P205 679000 Tonnes Of Ore Per Year
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major P2O5 Ore Phosphorus-Phosphates Phosphorus 679000mt 27wt-pct
  • Year 1979
    Description Phosphate Rock 27.8 % P205 636000 Tonnes Of Ore Per Year
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major P2O5 Ore Phosphorus-Phosphates Phosphorus 636000mt 28wt-pct
  • Year 1980
    Description Phosphate Rock 27.1 % P205 590000 Tonnes Of Ore Per Year
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major P2O5 Ore Phosphorus-Phosphates Phosphorus 590000mt 27wt-pct
  • Year 1981
    Description Phosphate Rock 27.4 % P205 809000 Tonnes Of Ore Per Year
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major P2O5 Ore Phosphorus-Phosphates Phosphorus 809000mt 27wt-pct
  • Year 1982
    Description Phosphate Rock 27.5 % P205 821000 Tonnes Of Ore Per Year
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major P2O5 Ore Phosphorus-Phosphates Phosphorus 821000mt 28wt-pct
  • Year 1983
    Description Phosphate Rock 27.4 % P205 819000 Tonnes Of Ore Per Year
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major P2O5 Ore Phosphorus-Phosphates Phosphorus 819000mt 27wt-pct
  • Year 1984
    Description Phosphate Rock 27.3 % P205 799000 Tonnes Of Ore Per Year
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major P2O5 Ore Phosphorus-Phosphates Phosphorus 799000mt 27wt-pct
  • Year 1985
    Description Phosphate Rock 28.1% P205 649000 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major P2O5 Ore Phosphorus-Phosphates Phosphorus 649000mt 28wt-pct
  • Year 1986
    Description Phosphate Rock 31.6% P205 895000 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major P2O5 Ore Phosphorus-Phosphates Phosphorus 895000mt 32wt-pct

Comments on the production information

  • Production At Proposed Henry North Mine Scheduled To Begin 1983 And End In 1984 ( USGS, 1975 );

Reserves and resources

  • Type In-situ
    Estimate year 1975
    Indicated 37500000mt ore
    Demonstrated 37500000mt ore
    Total resources 37500000mt ore
    Commodity Subtype Grade units Group Importance Year
    Phosphorus-Phosphates P2O5 28.4 wt-pct Phosphorus Major 1975

Comments on the reserve resource information

  • Matrix 2, Is A Noncumulative Matrix. Matrix 2, Column 1, Represents The In Situ Reserves At The Central Henry. Deposit. Matrix 1, Column 2, Represents The In Situ Reserves At The North Henry Deposit. Matrix 1, Column 3, Represents The Total In Situ Reserves At The Henry Mine. 1, Represents The Resources At The Central And South Henry Deposits. Row 3 Contains A Resource Estimate Derived By Extending The Downdip Width Dimension To 250 M, And Multipying By The Appropriate Length, Thickness, And Tonnage Factors. Row 4 Is A Resource Estimate Of The Tonnage In The Meade Peak Member Lying Between The Outcrop And A Vertical Projection Of Lease Boundaries. Matrix 2, Column 2, Represents The Resources At The North Henry Deposit. Matrix 2, Column 3, Represents The Total Resources Of The Henry Mine. Matrix 1, Is A Noncumulative Matrix. Matrix 1, Column

Workings at the site

  • Type of workings Surface
    Area 86HA
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method ESTIMATE
    Mining Method OPEN PIT
    Swell Factor .67
    Percent Waste Rock 86.6
    Avg. Overburden Thickness 15
    Primary Material Cover M-HARD ROCKS
    Percentage 60
    Secondary Material Cover SAND, GRAVEL
    Percentage 40
    Hardness of Ore SAND, GRAVEL
    Avg. Bench Height (meters) 15
    Max. Pit Slope (degrees) 45
    Capacity 6256
    Capacity Units MT ORE/DAY
    Preprod. Stripping Vol. 0
    Unit Production Cost 12.3
    Units of Production $/MT ORE
    Operating Days per Year 130
    Operating Shifts per Day 2
    Year of Information 1984

Comments on the workings information

  • Proposed Pit Of Henry North Mine Would Be 6500 Ft Long, 550 Ft Wide, 400 Ft Deep With 45 Deg Slope

Comments on development

  • 480 Acres Lease For Proposed Henry North Mine ( 1975 ) ; Econ.Com: For Proposed Henry North Mine, Stripping Ratio Expected To Be 3 : 1 (Cy Waste : Tons Ore); Henry Mine Reserves To Be Depleted By 1983

Reference information

Bibliographic references

  • Deposit

    British Sulphur Corp. Ltd., 1980: World Survey Of Phosphate Deposits, 4th Ed., London

  • Reserve-Resource

    Carter, R. A. An Integrated Industry - Phosphate Mining And Milling In Idaho. Min. Eng., V. 30, No. 1, 1978, Pp. 29-36.

  • Deposit

    World Mines Register 1981-82, San Francisco

  • Deposit

    Griner, W. C., 1974 , Seventy - First Annual Report Of The Mining Industry Of Idaho For 1973 - 1974 , P. 84

  • Reserve-Resource

    Davidson, D. F. Stratigraphic Sections Of The Phosphoria Formation In Idaho, Pt. 2. U.S. Geol. Surv. Circ. 305, 1953.

  • Deposit

    USGS, 1975 , Development Of Phosphate Resources In Southeastern Idaho: Draft Environmental Impact Statement, V. 2 , Pt. 9.1 , P. 2 - 28

  • Reserve-Resource

    Day, R. L. Trends In The Phosphate Industry Of Idaho And The Western Phosphate Field. Id Bureau Of Mines And Geol. Pamphlet 155, 1973, 63 Pp.

  • Reserve-Resource

    Emigh, G. D. Petrography, Mineralogy, And Origin Of Phosphate Pellets In The Phosphoria Formation. Id Bureau Of Mines And Geol. Pamphlet No. 114, 1958, 60 Pp.

  • Reserve-Resource

    Garrand, L. J. Phosphate Study Southeastern Idaho. U.S. Forest Service Contract No. 50-820, Garrand Corp., 1975.

  • Reserve-Resource

    Gulbrandsen, R. A., K. P. Mclaughlin, F. S. Hunkala, And S. E. Clabaugh. Geology Of The Johnson Creek Quadrangles Caribou County, Idaho. U.S. Geol. Surv. Bulletin 1042-A, 1956, 23 Pp.

  • Reserve-Resource

    Li, T. M. Southeastern Idaho Phosphate During Mining: How An Environmental Impact Statement Distorts Growth Plans. Min. Eng., V. 30, No. 1, 1978, Pp. 25-28.

  • Reserve-Resource

    Mansfield, G. R. Geography, Geology, And Mineral Resources Of Southeastern Idaho. U.S. Geol. Surv. Prof. Paper 152, 1927.

  • Reserve-Resource

    Martin, G. W. Mineralogy Of Phosphate Oolites. Econ. Geol., V. 53, No. 8, 1958, Pp. 1046-1048.

  • Reserve-Resource

    Mcdivitt, J. F. Economic Evaluation Of Phosphate And Other Minerals In Southern Idaho. Id Bureau Of Mines And Geol. Pamphlet No. 111, 1956.

  • Reserve-Resource

    Mckelvy, V. E., F. C. Armstrong, R. A. Gulbandsen, And R. M. Campbell. Stratigraphic Sections Of The Phosphoria Formation In Idaho. 1947-48, Part Ii. U.S. Geol. Surv. Circ. 301, 1953, Pp. 38-43.

  • Reserve-Resource

    Powell, J. D. Evaluation Of Phosphate Resources In Southeastern Idaho. Id Bureau Of Mines And Geol. Ic No. 25, 1974, 33 Pp.

  • Reserve-Resource

    Rule, H. R., D. E. Kirby, And D. C. Dahlin. Recent Advances In Beneficiation Of Western Phosphates. Min. Eng., V. 30, No. 1, 1978, P. 36-40.

  • Reserve-Resource

    Service, A. L. An Evaluation Of The Western Phosphate Industry And Its Resources (In Five Parts); Part 3, Idaho. Bumines Ri 6801, 1966, 201 Pp.

  • Reserve-Resource

    Service, A. L. And N. S. Petersen. An Evaluation Of The Western Phosphate Industry And Its Resources (In Five Parts); Part 5, Trends And Outlook. Bumines Ri 6935, 1967, 131 Pp.

  • Reserve-Resource

    Service, A. L. And C. C. Popoff. An Evaluation Of The Western Phosphate Industry And Its Resources (In Five Parts); Part 1, Introductory Review. Bumines Ri 6485, 1964, 86 Pp.

  • Reserve-Resource

    Thompson, M. E. Distribution Of Uranium In Rich Phosphate Beds Of The Phosphoria Formation. U.S. Geol. Surv. Bulletin 988-D, 1953, Pp. 45-65.

  • Reserve-Resource

    Thompson, M. E. Further Studies Of The Distribution Of Uranium In Rich Phosphate Beds Of The Phosphoria Formation. U.S. Geol. Surv. Bulletin 1009-D, 1954, Pp. 107-122.

  • Reserve-Resource

    Young, W. A., G. M. Pugh, G. D. Vandersluis, And V. Lim. Improved Ore Recovery From Phosphate Open Pits In The Phosphoria Formation. U.S. Bumines Contract J0285017, Dravo Corp., 1980, 319 Pp.

General comments

Subject category Comment text
Deposit This Record Was Compiled For The International Strategic Minerals Inventory. The Data Were Used In Preparation Of The USGS Circular 930 Series Of Reports. Mineral Resource Categories And Codes Herein Are From The International Classification System Recommended By The United Nations Group Of Experts On Definitions And Terminology For Mineral Resources. (See National Resources Forum, V. 4, No. 3, P. 307-313.). Surface 1-3 M Phosphate Concentrate Is Trucked To The Garfield, Utah Fertilizer Plant Or To The Railhead At Phoston, 250 Km Away
Deposit Thickness Phosphatic Shale Member ( Section 24 ) Is 163.25 Ft; Thickness Above For 2 Ore Zones

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUN-76 Siefken, Robert R. (Miller, Pat) U.S. Geological Survey
Reporter 01-JAN-83 Saam, Henning, G. Bundesanstalt Fuer Geowissenschaften und Rohstoffee (Germany)
Reporter 05-APR-95 Buckingham, David A. U.S. Bureau of Mines
Reporter 14-NOV-83 Western Field Operations Center (WFOC) U.S. Bureau of Mines
Updater 15-DEC-10 Causey, J. Douglas U.S. Geological Survey Added Model

Beyond USGS

Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.

Current status (per MSHA)

StatusAbandoned since 10/01/1990
MSHA mine ID1000091
Mine name (MSHA)Henry Mine
Current operatorMonsanto Company
Mine typeSurface (Metal / non-metal)

MSHA cross-reference per the original MRDS record. Mine status and operator reflect MSHA's last published Mines export (February 2025); MSHA's public bulk feed has been unavailable since, so this may be out of date. See the Mine Data Retrieval System for current status.

Open MSHA's Mine Data Retrieval System for inspections, accidents, and violations for this mine.

Maps centered on this site