Smokey Canyon Mine

Past Producer in Caribou county in Idaho, United States with commodities Fluorine-Fluorite, Phosphorus-Phosphates, REE, Uranium, Vanadium
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. Nearby scientific data
  10. Ore body information
  11. Economic information about the deposit and operations
  12. Mining district
  13. Mineral rights holdings
  14. Land status
  15. Ownership information
  16. Production statistics
  17. Reserves and resources
  18. Workings at the site
  19. Links to other databases
  20. Bibliographic references
  21. General comments
  22. Reporter information

Geologic information

Identification information

Deposit ID 10265661
MRDS ID W700616
MAS/MILS ID 0160290079
Record type Deposit
Current site name Smokey Canyon Mine
Alternate or previous names Area A, Crow Creek Ne, Area D, 35 Thru 48b, Stewart Flat, Smoky Canyon Mine
Included sites Pole Canyon

Geographic coordinates

Point of reference Pit
Geographic coordinates: -111.13186, 42.69679 (WGS84)
Elevation 2346
Location accuracy 10(meters)
Relative position Center of N-S pit near facilities. Workings exceed 4.5 miles long.

Site location context

Political divisions (FIPS codes)

Caribou(county)

Idaho(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Stewart Flat(quadrangle 1:24,000 scale)

Soda Springs(quadrangle 1:100,000 scale)

Preston(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Salt(hydrologic unit)

Snake Headwaters(hydrologic accounting unit)

Upper Snake(hydrologic subregion)

Pacific Northwest(hydrologic region)

Federal lands

Caribou-Targhee National Forest(National Forest)

National Forest FS(Type of land area)

FS(Federal land areas administered by FS)

Geographic areas

Country State County
United States Idaho Caribou

Public Land Survey System information

Meridian Township Range Section Fraction State
Boise 008 S 046 E 19, 31 Idaho

Commodities

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

Materials information

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

Mineral occurrence model information

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

Nearby scientific data

Pit (1) -111.13186, 42.69679

Economic information

Ore body information

  • Strike N00W
    Dip 20W
    Thickness 12.5M
    Length 26400M
    Width 250M
    Depth to top 0M
    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
    Strike And Dip N00W:20W
    Minimum Depth to Top 0
    Avg. Thick. Unconsol. Mat. 2
    Min. Thick. Unconsol. Mat. 0
    Date of Last Modification 830316
  • Strike N00S
    Dip 40W
    Thickness 46M
    Length 9654M
    Width 282M
    Depth to top 121M
    Field Value
    MAS Matrix # 1
    Type of Orebody #1 SEDIMENTARY
    Shape of Orebody #1 TABULAR
    Primary mode of Origin SEDIMENTATION
    Secondary mode of Origin OTHER
    Primary Ore Control BEDDING
    Secondary Ore Control FAULTING
    Degree of Wallrock Alter. NONE
    Strike And Dip N00S:40W
    Minimum Depth to Top 0
    Avg. Thick. Unconsol. Mat. 5
    Min. Thick. Unconsol. Mat. 0
    Date of Last Modification 830316
  • Thickness 18.8M
    Length 26400M
    Depth to top 0M
    Field Value
    MAS Matrix # 2
    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 FOLDING
    Degree of Wallrock Alter. NONE
    Minimum Depth to Top 0
    Avg. Thick. Unconsol. Mat. 2
    Min. Thick. Unconsol. Mat. 0
    Date of Last Modification 830316
  • Thickness 12.5M
    Length 26400M
    Depth to top 0M
    Field Value
    MAS Matrix # 2
    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
    Minimum Depth to Top 0
    Avg. Thick. Unconsol. Mat. 2
    Min. Thick. Unconsol. Mat. 0
    Date of Last Modification 830316
  • Thickness 1.3M
    Length 26400M
    Depth to top 0M
    Field Value
    MAS Matrix # 2
    MAS Column # 3
    Type of Orebody #1 SEDIMENTARY
    Shape of Orebody #1 TABULAR
    Primary mode of Origin SEDIMENTATION
    Secondary mode of Origin RESIDUAL CONCENT
    Primary Ore Control FOLDING
    Degree of Wallrock Alter. NONE
    Minimum Depth to Top 0
    Avg. Thick. Unconsol. Mat. 2
    Min. Thick. Unconsol. Mat. 0
    Date of Last Modification 830316
  • Thickness 18.8M
    Length 3200M
    Depth to top 0M
    Field Value
    MAS Matrix # 3
    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
    Minimum Depth to Top 0
    Avg. Thick. Unconsol. Mat. 2
    Min. Thick. Unconsol. Mat. 0
    Date of Last Modification 830316
  • Thickness 12.5M
    Length 3200M
    Depth to top 0M
    Field Value
    MAS Matrix # 3
    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
    Minimum Depth to Top 0
    Avg. Thick. Unconsol. Mat. 2
    Min. Thick. Unconsol. Mat. 0
    Date of Last Modification 830316
  • Thickness 1.3M
    Length 3200M
    Depth to top 0M
    Field Value
    MAS Matrix # 3
    MAS Column # 3
    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
    Minimum Depth to Top 0
    Avg. Thick. Unconsol. Mat. 2
    Min. Thick. Unconsol. Mat. 0
    Date of Last Modification 830316
  • Area 910HA
    Field Value
    Total Surface Area (HA) 910
    Date of Last Modification 910418

Economic information about the deposit and operations

Operation type Surface
Development status Past Producer
Commodity type Both
Significant Yes
Mining method Open Pit
Milling method Washing

Mining district

District name Crow Creek District

Mineral rights holdings

Type of mineral rights Federal Lease
Type of mineral rights Private Lease

Land status

Ownership category National Forest
Area name Caribou National Forest

Ownership information

  • Type Owner
    Owner U.S. Forest Service
    Year 1975
  • Type Owner-Operator
    Owner J. R. Simplot Co.
    Home office Idaho
    Year 1980

Production statistics

  • Year 1985
    Description Phosphate Rock 35.4% P2o5 1453000 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Phosphorus-Phosphates Phosphorus 1453000mt 35wt-pct
  • Year 1986
    Description Phosphate Rock 28.2% P2o5 1075000 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Phosphorus-Phosphates Phosphorus 1075000mt 28wt-pct

Reserves and resources

  • Type In-situ
    Estimate year 1975
    Indicated 57000000mt ore
    Demonstrated 57000000mt ore
    Total resources 57000000mt ore
    Commodity Subtype Grade units Group Importance Year
    REE REE 0.1 wt-pct REE Trace 1975
    Fluorine-Fluorite F 2.7599 wt-pct Fluorine Trace 1975
    Vanadium V2O5 0.07 wt-pct Vanadium Trace 1975
    Uranium U3O8 0.01 wt-pct Uranium Trace 1975
    Phosphorus-Phosphates P2O5 27.6 wt-pct Phosphorus Major 1975
  • Type In-situ
    Estimate year 1975
    Indicated 37000000mt ore
    Demonstrated 37000000mt ore
    Total resources 37000000mt ore
    Commodity Subtype Grade units Group Importance Year
    REE REE 0.1 wt-pct REE Trace 1975
    Fluorine-Fluorite F 1.55 wt-pct Fluorine Trace 1975
    Vanadium V2O5 0.07 wt-pct Vanadium Trace 1975
    Uranium U3O8 0.01 wt-pct Uranium Trace 1975
    Phosphorus-Phosphates P2O5 15.5 wt-pct Phosphorus Major 1975
  • Type In-situ
    Estimate year 1975
    Indicated 95000000mt ore
    Demonstrated 95000000mt ore
    Total resources 95000000mt ore
    Commodity Subtype Grade units Group Importance Year
    REE REE 0.1 wt-pct REE Trace 1975
    Fluorine-Fluorite F 2.2899 wt-pct Fluorine Trace 1975
    Vanadium V2O5 0.07 wt-pct Vanadium Trace 1975
    Uranium U3O8 0.01 wt-pct Uranium Trace 1975
    Phosphorus-Phosphates P2O5 22.9 wt-pct Phosphorus Major 1975
  • Type In-situ
    Estimate year 1975
    Indicated 76000000mt ore
    Demonstrated 76000000mt ore
    Total resources 76000000mt ore
    Commodity Subtype Grade units Group Importance Year
    REE REE 0.1 wt-pct REE Trace 1975
    Fluorine-Fluorite F 2.7599 wt-pct Fluorine Trace 1975
    Vanadium V2O5 0.07 wt-pct Vanadium Trace 1975
    Uranium U3O8 0.01 wt-pct Uranium Trace 1975
    Phosphorus-Phosphates P2O5 27.6 wt-pct Phosphorus Major 1975
  • Type In-situ
    Estimate year 1975
    Indicated 49000000mt ore
    Demonstrated 49000000mt ore
    Total resources 49000000mt ore
    Commodity Subtype Grade units Group Importance Year
    REE REE 0.1 wt-pct REE Trace 1975
    Fluorine-Fluorite F 1.55 wt-pct Fluorine Trace 1975
    Vanadium V2O5 0.07 wt-pct Vanadium Trace 1975
    Uranium U3O8 0.01 wt-pct Uranium Trace 1975
    Phosphorus-Phosphates P2O5 15.5 wt-pct Phosphorus Major 1975
  • Type In-situ
    Estimate year 1975
    Indicated 125000000mt ore
    Demonstrated 125000000mt ore
    Total resources 125000000mt ore
    Commodity Subtype Grade units Group Importance Year
    Phosphorus-Phosphates P2O5 22.9 wt-pct Phosphorus Major 1975
    Uranium U3O8 0.01 wt-pct Uranium Trace 1975
    Vanadium V2O5 0.07 wt-pct Vanadium Trace 1975
    Fluorine-Fluorite F 2.2899 wt-pct Fluorine Trace 1975
    REE REE 0.1 wt-pct REE Trace 1975

Comments on the reserve resource information

  • NEWLY DEVELOPED MINE WHICH REPLACED CONDA MINE. 30 YEAR MINE LIFE REPORTED IN RANDOL 93/94. PRODUCING 1,100,000 ST/YR AS OF 3-93. ESTIMATED MINE LIFE 12 YEARS PER BLM PHOSPHATE SPECIALIST AS OF 3-93. TRYING TO ADD RESERVES.

Workings at the site

  • Type of workings Surface
    Area 728HA
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method PROPOSED
    Mining Method OPEN PIT
    Swell Factor .75
    Percent Waste Rock 84.3
    Avg. Overburden Thickness 2
    Hardness of Ore M-HARD ROCKS
    Avg. Bench Height (meters) 14
    Max. Pit Slope (degrees) 45
    Capacity 7159
    Capacity Units MT ORE/DAY
    Preprod. Stripping Vol. 25
    Unit Production Cost 6.52
    Units of Production $/MT ORE
    Operating Days per Year 260
    Operating Shifts per Day 3
    Year of Information 1984

Reference information

Bibliographic references

  • Deposit

    U.S. GEOLOGICAL SURVEY, BUREAU OF LAND MANAGEMENT, AND U.S. FOREST SERVICE, 1978, FINAL ENVIRONMENTAL IMPACT STATEMENT / DEVELOPMENT OF PHOSPHATE RESOURCES IN SOUTHEASTERN IDAHO, FOUR VOLUMES.

  • Reserve-Resource

    GARRAND, L. J., 1975, PHOSPHATE STUDY SOUTHEASTERN IDAHO, FOR U.S. DEPARTMENT OF AGRICULTURE, CARIBOU NATIONAL FOREST, U.S. DEPARTMENT OF AGRICULTURE CONTRACT NO. 50-820: GARRAND CORP.

  • Geology

    MANSFIELD, G. R., 1927, GEOGRAPHY, GEOLOGY, AND MINERAL RESOURCES OF SOUTHEASTERN IDAHO: U.S. GEOLOGICAL SURVEY PROFESSIONAL PAPER 152

  • Reserve-Resource

    U.S. FOREST SERVICE, U.S. GEOLOGICAL SURVEY, AND THE J. R. SIMPLOT COMPANY, 1980, ENVIRONMENTAL IMPACT STATEMENT FACT SHEET - SCOPE OF WORK, SMOKY CANYON MINE, IDAHO MINE PLAN.

  • Geology

    MONTGOMERY, K. M., AND CHENEY, T. M., 1967, GEOLOGY OF THESTEWART FLAT QUADRANGLE CARIBOU COUNTY, IDAHO: U.S. GEOLOGICAL SURVEY BULLETIN 1217.

  • Deposit

    MINING MAGAZINE, JANUARY 1989, P. 45

  • Geology

    SHELDON, R. P., WARNER, M. A., THOMPSON, M. E., AND PIERCE, H. W., 1953, STRATIGRAPHIC SECTIONS OF THE PHOSPHORIA FORMATION IN IDAHO, 1949, PT. 1: U.S. GEOLOGICAL SURVEY CIRCULAR 304

  • Reserve-Resource

    JOB SERVICE, 1980, POCATELLA EMPLOYMENT, VOL. 14, NO. 5, P.2

  • Deposit

    CARTER, RUSSELL A., 1978, AN INTEGRATED INDUSTRY - PHOSPHATE MINING AND MILLING IN IDAHO: MINING ENGINEERING, V. 30, NO. 1, P. 29-36.

  • Geology

    EMIGH, G. D., 1958, PETROGRAPHY, MINERALOGY AND ORIGIN OF PHOSPHATE PELLETS IN THE PHOSPHORIA FORMATION: IDAHO BUREAU OF MINES AND GEOLOGY, PAMPLET NO. 114, 60 P.

  • Deposit

    DAY, R. L., 1973, TRENDS IN THE PHOSPHATE INDUSTRY OF IDAHO AND THE WESTERN PHOSPHATE FIELD: IDAHO BUREAU OF MINES AND GEOLOGY, PAMPHLET 155, 63 P.

  • Geology

    MARTIN, G. W., 1958, MINERALOGY OF PHOSPHATE OOLITES: ECONOMIC GEOLOGY, V. 53, NO. 8, DECEMBER, P. 1046-1048.

  • Deposit

    LI, TA M., 1978, SOUTHEASTERN IDAHO PHOSPHATE MINING: HOW AN ENVIRONMENTAL IMPACT STATEMENT DISTORTS GROWTH PLANS: MINING ENGINEERING, V. 30, NO. 1, P. 25-28.

  • Deposit

    MC DIVITT, J. F., 1956, ECONOMIC EVALUATION OF PHOSPHATE AND OTHER MINERALS IN SOUTHERN IDAHO: IDAHO BUREAU OF MINES AND GEOLOGY, PAMPLET NO. 111, 48 P.

  • Deposit

    POWELL, J. D., 1974, EVALUATION OF PHOSPHATE RESOURCES IN SOUTHEAST IDAHO: IDAHO BUREAU OF MINES AND GEOLOGY, INFORMATION CIRCULAR NO. 25, 33 P.

  • Deposit

    RULE, A. R., D. E. KIRBY, AND D. C. DAHLIN, 1978, RECENT ADVANCES IN BENEFICIATION OF WESTERN PHOSPHATES: MINING ENGINEERING, V. 30, NO. 1, P. 37-40.

  • Deposit

    SERVICE, A. L., 1966, AN EVALUATION OF THE WESTERN PHOSPHATE INDUSTRY AND ITS RESOURCES (IN FIVE PARTS), 3. IDAHO: U.S. BUREAU OF MINES, REPORT OF INVESTIGATIONS 6801, 201 P.

  • Deposit

    SERVICE, A. L., AND PETERSEN, N. S., 1967, AN EVALUATION OF THE WESTERN PHOSPHATE INDUSTRY AND ITS RESOURCES (IN FIVE PARTS) TRENDS AND OUTLOOK: U.S. BUREAU OF MINES, REPORT OF INVESTIGATIONS 6935, 131 P.

  • Deposit

    SERVICE, A. L. AND POPOFF, C. C., 1964, AN EVALUATION OF THE WESTERN PHOSPHATE INDUSTRY AND ITS RESOURCES (IN FIVE PARTS), 1. INTRODUCTORY REVIEW: U.S. BUREAU OF MINES, REPORT OF INVESTIGATIONS 6485, 86 P.

  • Deposit

    THOMPSON, M. E., 1953, DISTRIBUTION OF URANIUM IN RICH PHOSPHATE BEDS OF THE PHOSPHORIA FORMATION: U.S. GEOLOGICAL SURVEY BULLETIN 988-D, P. 45-65

  • Deposit

    THOMPSON, M. E., 1954, FURTHER STUDIES OF THE DISTRIBUTION OF URANIUM IN RICH PHOSPHATE BEDS OF THE PHOSPHORIA FORMATION: U.S. GEOLOGICAL SURVEY BULLETIN 1009-D, P. 107-122

  • Deposit

    GARRAND, L., PHOSPHATE STUDY SOUTHWESTERN IDAHO, DEPARTMENT AGRICULTURE, CARIBOU NATIONAL FOREST (CONTRACT NO. 50-820) GARRAND CORPORATION, 1975.

  • Deposit

    GOSLING, B.B. WESTERN PHOSPHATE FIELD-SOUTHEASTERN IDAHO ACTIVE MINES, BUREAU OF MINES, MINERALS AVAILABILITY REPORT, 1980, 150 PP.

  • Deposit

    HAGIUS, F., PERSONAL COMMUNICATION-GENERAL PHOSPHATE RESOURCE AND ROYALTY INFORMATION, BUREAU OF LAND MANAGEMENT, 1984.

  • Deposit

    HOVLAND, D., PERSONAL COMMUNICATION-GENERAL PHOSPHATE INFORMATION, BUREAU OF LAND MANAGEMENT, 1984.

  • Deposit

    KIMBALL, R., PERSONAL COMMUNICATION-PROJECT MANAGER, SMOKY CANYON MINE, GENERAL MINE INFORMATION, 1984.

  • Deposit

    LOWE, N. T., D. A. BENJAMIN, T. W. CAMM, B. B. GOSLING, AND G. D. GALE, WESTERN PHOSPHATE FIELD-SOUTHERN IDAHO PROPOSED MINES, BUMINES MAS FILE REPORT, 1980, 238 PP.

  • Deposit

    MCKELVEY, V. E., THE PHOSPHORIA, PARK CITY, AND SHEDHORN FORMATIONS IN THE WESTERN PHOSPHATE FIELD, U.S. GEOL. SURV. PROF. PAPER 313-A, 1959. 47 PP.

  • Deposit

    SERVICE, A. L., AN EVALUATION OF THE WESTERN PHOSPHATE INDUSTRY AND ITS RESOURCES (IN FIVE PARTS), 3. IDAHO, BUMINES RI 6801, 1979, 201 PP.

  • Deposit

    STECKLEY, R. C. AND J. F. LEMONS, A METHOD FOR EVALUATING COST ESTIMATES FOR THE MINERAL AVALIABILITY SYSTEM, BUMINES MAS FILE REPORT, 1976, 41 PP.

  • Deposit

    U.S. BUREAU OF LAND MANAGEMENT, RASMUSSEN RIDGE MINING AND RECLAMATION PLAN, 1982, 22 PP.

  • Deposit

    U.S. GEOLOGICAL SURVEY, BUREAU OF LAND MANAGEMENT, AND U.S. FOREST SERVICE, FINAL ENVIRONMENTAL IMPACT STATEMENT/DEVELOPMENT OF PHOSPHATE RESOURCES IN SOUTHEASTERN IDAHO (FOUR V.), 1978.

General comments

Subject category Comment text
Deposit STRIKE & DIP OF MATRIX 2 (WEST LIMB OF ANTICLINE) AT 50 PERCENT LEVEL EQUALS N00W AND 20 DEGREES WEST. STRIKE & DIP OF MATRIX 3 (EAST LIMB OF ANTICLINE) AT 50 PERCENT LEVEL EQUALS N30W AND 45 DEGREES EAST. AVERAGE WIDTH OF MINERALIZATION (G-AWM) FOR MATRIX 1 COL 1 IS ESTIMATED AND NOT FROM COMPANY PROPOSED PIT DIMENSIONS. AVERAGE THICKNESS OF MINERALIZED ZONE (G-AWM) IS A CUMULA- TIVE FIGURE REPRESENTING MINABLE PHOSPHATE STRATA AND DOES NOT INCLUDE INTERVENING STRATA OF WASTE. IN MATRICES 2 AND 3 COLUMNS 1,2, AND 3, G-AWM WAS LEFT BLANK. G-AWM IS VARIABLE IN THESE COLUMNS AS ONE GOES FROM P-50 TO P-10 PERCENT QUANTITY LEVELS. P-50 QUANTITY LEVEL REPRESENTS THE SITUATION OF THE MINERALIZED STRATA CONTINUING TO A DOWNDIP DEPTH OF 250 M AT THE AVERAGE SURFACE DIP ANGLE. P-25 PERCENT QUANTITY LEVEL DEPICTS THE RESOURCE POSSIBLE IF THE STRATA WERE HORIZONTAL TO THE LEASE BOUNDARY. P-10 PERCENT QUANTITY LEVEL DEPICTS THE RESOURCE POSSIBIL- ITY IF THE STRATA ATTITUDE WAS 45 DEGREES IN DIP EXTEND- ING TO THE LEASE BOUNDARY. THE BOULDER CREEK ANTICLINE TRANSVERSES THE LEASE AREA. PHOSPHATE RESOURCES OCCUR ON BOTH LIMBS OF THE ANTICLINE AND WITHIN LEASE BOUNDARY.

Reporter information

Type Date Name Affiliation Comment
Reporter 11-OCT-96 Spear, James M. U.S. Bureau of Mines
Reporter 01-AUG-89 Beougher, Dee U.S. Geological Survey
Updater 26-OCT-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.