Minntac Mine

Producer in St. Louis county in Minnesota, United States with commodity Iron

Geologic information

Identification information

Deposit ID 10243455
MRDS ID W018511
MAS/MILS ID 0271370013
Record type Site
Current site name Minntac Mine
Related records 10072828

Geographic coordinates

Point of reference Plant
Geographic coordinates: -92.6377, 47.56669 (WGS84)
Elevation 530
Location accuracy 10(meters)
(click for info)

Geographic areas

Country State County
United States Minnesota St. Louis

Public Land Survey System information

Meridian Township Range Section Fraction State
4th Principal 059 N 018 W 28 Minnesota

Commodities

Commodity Importance
Iron Primary

Materials information

Materials Type of material
Ankerite Unknown
Chert Unknown
Chlorite Unknown
Hematite Unknown
Magnetite Unknown
Pyrite Unknown
Quartz Unknown
Siderite Unknown
Talc Unknown

Nearby scientific data

Plant (1) -92.6377, 47.56669

Ore body information

  • Strike N75E
    Dip 10S
    Thickness 141M
    Depth to top 9M
    Width 2012M
    Length 10461M
    Field Value
    MAS Matrix # 1
    MAS Column # 1
    Type of Orebody #1 SEDIMENTARY
    Shape of Orebody #1 TABULAR
    Type of Orebody #2 DISSEMINATED
    Primary mode of Origin SEDIMENTATION
    Secondary mode of Origin METAMORPHISM
    Primary Ore Control LITHOLOGY
    Secondary Ore Control BEDDING
    Degree of Wallrock Alter. SLIGHT
    Type of Wallrock Alter. #1 UNKNOWN
    Strike And Dip N75E
    Minimum Depth to Top 1
    Avg. Thick. Unconsol. Mat. 9
    Min. Thick. Unconsol. Mat. 1
    Date of Last Modification 810902
  • Area 9600HA
    Field Value
    Total Surface Area (HA) 9600
    Date of Last Modification 910418

Comments on the geologic information

  • MINERAL NAME IN RECORD 04 INCLUDES CHAMOSITE, AN IRON-RICH CHLORITE. ADDITIONAL MINERALS PRESENT IN THE DEPOSIT INCLUDE GREENALITE, MINNESOTAITE, AND STILPNOMELANE.

Economic information

Economic information about the deposit and operations

Operation type Surface
Development status Producer
Commodity type Metallic
Deposit size Large
Significant Yes
Discovery year 1890
Year of first production 1967

Mining district

District name Main Mesabi

Mineral rights holdings

Type of mineral rights Fee Ownership

Land status

Ownership category Mixed

Ownership information

  • Type Owner-Operator
    Owner USX Corp., Div. Of U.S. Steel Corp.
    ID 2100282
    Interest 100
    Home office Pennsylvania
    Year 1987

Production statistics

  • Year 1967
    Description Iron Ore Pellets - Total Shipped 549494 Metric Tons For The Year
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Iron Iron 549,494mt
  • Year 1968
    Description Iron Ore Pellets - Total Shipped 4587199 Metric Tons For The Year
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Iron Iron 4,587,199mt
  • Year 1969
    Description Iron Ore Pellets - Total Shipped 6088500 Metric Tons For The Year
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Iron Iron 6,088,500mt
  • Year 1970
    Description Iron Ore Pellets - Total Shipped 6441800 Metric Tons For The Year
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Iron Iron 6,441,800mt
  • Year 1971
    Description Iron Ore Pellets - Total Shipped 6583000 Metric Tons For The Year
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Iron Iron 6,583,000mt
  • Year 1972
    Description Iron Ore Pellets - Total Shipped 8667699 Metric Tons For The Year
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Iron Iron 8,667,699mt
  • Year 1973
    Description Iron Ore Pellets - Total Shipped 12582700 Metric Tons For The Year
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Iron Iron 1,258,270mt
  • Year 1974
    Description Iron Ore Pellets - Total Shipped 12593400 Metric Tons For The Year
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Iron Iron 1,259,340mt
  • Year 1975
    Description Iron Ore Pellets - Total Shipped 12203800 Metric Tons For The Year
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Iron Iron 1,220,380mt
  • Year 1976
    Description Iron Ore Pellets - Total Shipped 12537400 Metric Tons For The Year
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Iron Iron 1,253,740mt
  • Year 1977
    Description Iron Ore Pellets - Total Shipped 7545300 Metric Tons For The Year
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Iron Iron 7,545,300mt
  • Year 1978
    Description Iron Ore Pellets - Total Shipped 12575600 Metric Tons For The Year
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Iron Iron 1,257,560mt
  • Year 1979
    Description Iron Ore Pellets - Total Shipped 16719700 Metric Tons For The Year
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Iron Iron 1,671,970mt
  • Year 1980
    Description Iron Ore Pellets - Total Shipped 14642300 Metric Tons For The Year
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Iron Iron 1,464,230mt
  • Year 1981
    Description Iron Ore Pellets - Total Shipped 12725600 Metric Tons For The Year
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Iron Iron 1,272,560mt
  • Year 1982
    Description Iron Ore Pellets - Total Shipped 3459100 Metric Tons For The Year
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Iron Iron 3,459,100mt
  • Year 1983
    Description Iron Ore Pellets - Total Shipped 7653400 Metric Tons For The Year
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Iron Iron 7,653,400mt
  • Year 1984
    Description Iron Ore Pellets - Total Shipped 8748700 Metric Tons For The Year
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Iron Iron 8,748,700mt
  • Year 1985
    Description Iron Ore Pellets - Total Shipped 10119500 Metric Tons For The Year
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Iron Iron 1,011,950mt
  • Year 1986
    Description Iron Ore Pellets - Total Shipped 5483600 Metric Tons For The Year
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Iron Iron 5,483,600mt
  • Year 1987
    Description Iron Ore Pellets - Total Shipped 7553000 Metric Tons For The Year
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Iron Iron 7,553,000mt
  • Year 1988
    Description Iron Ore Pellets - Total Shipped 12343000 Mt
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Iron Iron 1,234,300mt
  • Year 1989
    Description Iron Ore Pellets - Total Shipped 12490000 Mt
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Iron Iron 1,249,000mt
  • Year 1990
    Description Iron Ore Pellets - Total Shipped 13446000 Mt
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Iron Iron 1,344,600mt
  • Year 1991
    Description Iron Ore Pellets - Total Shipped 13514000 Mt
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Iron Iron 1,351,400mt
  • Year 1992
    Description Iron Ore Pellets - Total Shipped 13446000 Mt
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Iron Iron 1,344,600mt
  • Year 1993
    Description Iron Ore Pellets - Total Shipped 14434000 Mt
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Iron Iron 1,443,400mt

Comments on the production information

  • UNITS OF OUTPUT IN RECORD A IS ACTUALLY MT FE ORE PELLETS/ DAY.

Comments on the reserve resource information

  • MESABI RANGE; IN RANGE 21W (0271370040) AND 20W (0271370039) OF MARSDEN STUDY. 1994 RESERVE IN ADIT ESTIMATED BY SUBTRACTING 1994 PRODUCTION (49,325,000 MTS) FROM 1993 RESERVE ESTIMATE (1,520,000,000 MTS) PRODUCTION FROM SKILLINGS MAG, 7/30/94, P. 22.)

Workings at the site

  • Type of workings Surface
    Area 2720HA
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method ACTUAL
    Mining Method OPEN PIT
    Swell Factor .61
    Percent Waste Rock 45.8
    Avg. Overburden Thickness 9
    Primary Material Cover SAND, GRAVEL
    Percentage 100
    Hardness of Ore HARD ROCKS
    Avg. Bench Height (meters) 12
    Max. Pit Slope (degrees) 68
    Capacity 111766
    Capacity Units MT ORE/DAY
    Unit Production Cost 2.08
    Units of Production $/MT ORE
    Operating Days per Year 365
    Operating Shifts per Day 3
    Year of Information 1987

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
U.S. Bureau of Mines Minerals Availability System MAS 0271370013
Mine Safety and Health Administration MSHA MSHA 2100282

Bibliographic references

  • Deposit

    DEVANEY, F. D. IRON ORE STORY OF THE UPPER GREAT LAKES,

  • Deposit

    PAST AND FUTURE. SKILLINGS' MINING REVIEW, MAR. 13,

  • Deposit

    1971, FRONT COVER AND PP. 4-7 AND 16.

  • Deposit

    SKILLINGS' MINING REVIEW. U. S. STEEL SHIPMENTS OF IRON ORE

  • Deposit

    FROM MINNESOTA. JAN. 27, 1968, P. 14.

  • Deposit

    -----. U. S. STEEL MINNESOTA IRON ORE SHIPMENTS. JAN. 25,

  • Deposit

    1969, P. 9.

  • Deposit

    -----. U. S. STEEL IRON ORE SHIPMENTS FROM MINNESOTA. JAN.

  • Deposit

    31, 1970, P. 27.

  • Deposit

    -----. U. S. STEEL IRON ORE SHIPMENTS FROM MINNESOTA DURING

  • Deposit

    1970. JAN. 30, 1971, P. 25.

  • Deposit

    -----. U. S. STEEL CORP.'S IRON ORE SHIPMENTS FROM MINNE-

  • Deposit

    SOTA. JAN. 15, 1972, P. 39.

  • Deposit

    -----. U. S. STEEL'S MINNESOTA SHIPMENTS OF IRON ORE. FEB.

  • Deposit

    24, 1973, P. 22.

  • Deposit

    -----. U. S. STEEL IRON ORE SHIPMENTS INCREASE TO 21,224,

  • Deposit

    958 G.T. FEB. 2, 1974, P. 6.

  • Deposit

    -----. U. S. STEEL SHIPMENTS OF IRON ORE FROM MINES IN MIN-

  • Deposit

    NESOTA. FEB. 8, 1975, P. 25.

  • Deposit

    -----. U. S. STEEL SHIPMENTS OF IRON ORE IN 1975. JAN. 17,

  • Deposit

    1976, P. 5.

  • Deposit

    -----. U. S. STEEL ORE SHIPMENTS FROM MINNESOTA IN 1976.

  • Deposit

    JAN. 29, 1977, P. 10.

  • Deposit

    -----. U. S. STEEL'S MINNESOTA ORE SHIPMENTS IN 1977. JAN.

  • Deposit

    14, 1978, P. 8.

  • Deposit

    -----. 1978 U. S. STEEL IRON ORE SHIPMENTS FROM MINNESOTA.

  • Deposit

    JAN. 13, 1979, P. 5.

  • Deposit

    19, 1980, P. 10.

  • Deposit

    -----. 1980 U. S. STEEL IRON ORE SHIPMENTS FROM MINNESOTA.

  • Deposit

    JAN. 10, 1981, P. 6.

  • Deposit

    _____. U. S. STEEL'S MINNESOTA ORE OPERATIONS SHIPMENTS,

  • Deposit

    1981. JAN. 16, 1982, P. 9.

  • Deposit

    _____. U. S. STEEL'S SHIPMENTS FROM MINNESOTA ORE OPERA-

  • Deposit

    TIONS. JAN. 15, 1983, P. 5.

  • Deposit

    _____. U. S. STEEL'S MINNESOTA ORE SHIPMENTS INCREASE IN

  • Deposit

    1983. JAN. 28, 1984, P. 21.

  • Deposit

    _____. U. S. STEEL'S MINNTAC PELLET SHIPMENTS AT 8,709,000

  • Deposit

    G.T. FEB. 2, 1985, P. 16.

  • Deposit

    _____. U. S. STEEL'S MINNTAC PELLET SHIPMENTS INCREASE IN

  • Deposit

    1985. JAN. 11, 1986, P. 35.

  • Deposit

    _____. USS DIVISION OF USX IRON ORE SHIPMENTS AT 5,506,000

  • Deposit

    G.T. JAN. 31, 1987, P. 9.

  • Deposit

    _____. USS DIVISION'S IRON ORE SHIPMENTS FROM MINNESOTA

  • Deposit

    PROPERTIES IN 1987. FEB. 20, 1988, P. 6.

  • Production

    MINNTAC, CONCENTRATING FLOW SHEET--STEPS 1, 2, 3 (COMPANY

  • Production

    INFO. HANDOUT). 1 P.

  • Ownership

    USX CORPORATION. 1986 ANNUAL REPORT, FORM 10-K. PP. 2 AND

  • Ownership

    17.

  • Deposit

    AMERICAN MINING CONGRESS. COSMAR WORKING PAPER V, PREP. BY

  • Deposit

    THE PANEL ON LARGE OPEN-PIT MINES IN HUMID ENVIRONMENTS

  • Deposit

    FOR THE COMMITTEE ON SURFACE MINING AND RECLAMATION.

  • Deposit

    WASHINGTON, D.C., 1979, 103 PP.

  • Deposit

    CARTHEW, D. J. MINNESOTA TACONITE MINING PROBLEMS RESOLVED,

  • Deposit

    IN OPEN-PIT PLANNERS FACE COMPLEX PROBLEMS WHEN DESIGNING

  • Deposit

    THE TOTAL MINE OPERATION. E/MJ, SEPTEMBER 1967, PP. 102-

  • Deposit

    106.

  • Deposit

    ENGINEERING AND MINING JOURNAL. MINNTAC--BIG AND GROWING

  • Deposit

    BIGGER. JULY 1970, PP. 63-71.

  • Deposit

    -----. US STEEL EXPANDING MINNTAC PELLET PLANT, IN THIS

  • Deposit

    MONTH IN MINING. AUGUST 1970, P. 118.

  • Deposit

    -----. MINNESOTA, IN NEWS BRIEFS--IN THE US (CONTAINS THREE

  • Deposit

    PARAGRAPHS CONCERNING MINNTAC). JULY 1974, P. 118.

  • Deposit

    -----. MINNTAC PREPARING FOR SECOND MAJOR EXPANSION, IN

  • Deposit

    BILLION-DOLLAR EXPANSION OF US IRON ORE REFLECTS FORECAST

  • Deposit

    RECORD DEMAND GROWTH. NOVEMBER 1974, PP. 106-110.

  • Deposit

    -----. MINNESOTA, IN NEWS BRIEFS--IN THE US (CONTAINS TWO

  • Deposit

    PARAGRAPHS CONCERNING MINNTAC). MARCH 1975, P. 254.

  • Deposit

    PARAGRAPHS CONCERNING MINNTAC). AUGUST 1975, P. 154.

  • Deposit

    -----. MINNTAC EXPANDING TO 18.5 MILLION LTPY. JUNE 1977,

  • Deposit

    PP. 125-126.

  • Deposit

    ERICKSON, D. V. MINNTAC STORY--AGGLOMERATION. SKILLINGS'

  • Deposit

    MINING REVIEW, APR. 25, 1970, FRONT COVER AND PP. 12-14.

  • Deposit

    FRENCH, B. M. PROGRESSIVE CONTACT METAMORPHISM OF THE BI-

  • Deposit

    WABIK IRON-FORMATION, MESABI RANGE, MINNESOTA. MINN.

  • Deposit

    GEOLOGICAL SURVEY BULL. 45, 1968, 103 PP.

  • Deposit

    GUNDERSEN, J. N., AND G. M. SCHWARTZ. THE GEOLOGY OF THE

  • Deposit

    METAMORPHOSED BIWABIK IRON-FORMATION, EASTERN MESABI DIS-

  • Deposit

    TRICT, MINNESOTA. MINN. GEOLOGICAL SURVEY BULL. 43, 1962,

  • Deposit

    139 PP.

  • Deposit

    HARTLEY, D. THE MINNTAC STORY--MINING OPERATIONS. SKIL-

  • Deposit

    LINGS' MINING REVIEW, APR. 11, 1970, FRONT COVER AND PP.

  • Deposit

    8-9.

  • Deposit

    -----. RADIO REMOTE CONTROL OF LOCOMOTIVES. SKILLINGS'

  • Deposit

    MINING REVIEW, NOV. 21, 1970, FRONT COVER AND PP. 6-7.

  • Deposit

    HOPPE, R. MINNTAC HITS 18.5 MILLION LTPY OF PELLET CAPA-

  • Deposit

    CITY, IN NEW TACONITE CAPACITY. E&MJ, SEPTEMBER 1979,

  • Deposit

    PP. 96-99.

  • Deposit

    HOPPE, R. W., AND R. A. THOMAS. TACONITE PROGRESS REPORT,

  • Deposit

    MASSIVE EXPANSIONS BY THE LAKE SUPERIOR PELLET PRODUCERS

  • Deposit

    HAVE INCREASED REGIONAL CAPACITY BY 31 MILLION LTPY.

  • Deposit

    E&MJ, SEPTEMBER 1979, PP. 64-65.

  • Deposit

    KOSKI, R. E. CONSTRUCTION PROGRESS REPORT, UNITED STATES

  • Deposit

    STEEL CORPORATION, MINNTAC STEP III EXPANSION. PROC.

  • Deposit

    49TH ANN. MEETING, MINNESOTA SEC., AIME AND 37TH ANN.

  • Deposit

    MINING SYMP., DULUTH, MINN., JAN. 14-16, 1976, PP. 4-1 -

  • Deposit

    4-6.

  • Deposit

    MARSDEN, R. W. IRON ORE RESERVES OF THE MESABI RANGE, MIN-

  • Deposit

    NESOTA (A MINERALS AVAILABILITY SYSTEM REPORT). BUMINES

  • Deposit

    OPEN FILE REPT. 109-80, 1980, 73 PP.; AVAILABLE FOR REF-

  • Deposit

    ERENCE AT BUREAU OF MINES FACILITIES IN DENVER, COLO.,

  • Deposit

    TWIN CITIES, MINN., PITTSBURGH, PA., AND SPOKANE, WASH.;

  • Deposit

    AT NATIONAL LIBRARY OF NATURAL RESOURCES, U.S. DEPARTMENT

  • Deposit

    OF THE INTERIOR, WASHINGTON, D.C.; AND FROM NATL. TECH-

  • Deposit

    NICAL INFO. SERVICE, SPRINGFIELD, VA., PB 80-228984.

  • Deposit

    MOREY, G. B. MESABI RANGE, IN GEOLOGY OF MINNESOTA: A CEN-

  • Deposit

    TENNIAL VOLUME (CHAP. IV--MIDDLE PRECAMBRIAN), ED. BY P.

  • Deposit

    K. SIMS AND G. B. MOREY. MINN. GEOLOGICAL SURVEY, 1972, PP.

  • Deposit

    204-217.

  • Deposit

    NIEMI, C. W. U.S. STEEL'S MINNTAC OPERATION. MINING CON-

  • Deposit

    GRESS JOURNAL, MARCH 1974, PP. 53-59.

  • Deposit

    PROTHERO, K. L. MINNTAC STORY--CRUSHING & CONCENTRATING.

  • Deposit

    SKILLINGS' MINING REVIEW, APR. 18, 1970, FRONT COVER AND

  • Deposit

    PP. 10-12.

  • Deposit

    SKILLINGS, D. N., JR. U. S. STEEL CORP., IN 1972 ACTIVITY

  • Deposit

    AT MINNESOTA IRON ORE MINES AND PLANTS. SKILLINGS' MI-

  • Deposit

    NING REVIEW, JUNE 3, 1972, PP. 12-13.

  • Deposit

    -----. U. S. STEEL CORP., IN 1974 MINNESOTA TACONITE AND

  • Deposit

    NATURAL ORE ACTIVITY. SKILLINGS' MINING REVIEW, JUNE 29,

  • Deposit

    1974, PP. 10-11.

  • Deposit

    -----. U. S. STEEL CORP., IN 1978 IRON ORE OPERATIONS IN

  • Deposit

    MINNESOTA. SKILLINGS' MINING REVIEW, JULY 29, 1978, PP.

  • Deposit

    22-23.

  • Deposit

    -----. U. S. STEEL CORP., IN 1979 IRON ORE OPERATIONS IN

  • Deposit

    MINNESOTA. SKILLINGS' MINING REVIEW, JULY 28, 1979, PP.

  • Deposit

    28-29.

  • Deposit

    -----. U. S. STEEL CORP., IN MINNESOTA IRON ORE OPERATIONS

  • Deposit

    1980. SKILLINGS' MINING REVIEW, AUG. 2, 1980, P. 16.

  • Deposit

    SKILLINGS' MINING REVIEW. START-UP PREPARATIONS AT MINNTAC

  • Deposit

    UNDER WAY. JULY 15, 1972, P. 10.

  • Deposit

    -----. U. S. STEEL CONTINUING WITH MINNTAC STEP III CON-

  • Deposit

    STRUCTION. JAN. 8, 1977, PP. 52-53.

  • Deposit

    -----. U. S. STEEL SHIPS 100,000,000TH G.T. OF MINNTAC PEL-

  • Deposit

    LETS. DEC. 2, 1978, P. 9.

  • Deposit

    UNITED STATES STEEL CORPORATION, MINNESOTA ORE OPERATIONS.

  • Deposit

    STATISTICS OF TACONITE (COMPANY INFO. HANDOUT RELATING TO

  • Deposit

    MINNTAC). 1 P.

  • Deposit

    -----. WELCOME TO MINNTAC (COMPANY INFO. PAMPHLET CON-

  • Deposit

    CERNING THE MINNTAC FACILITIES).

  • Deposit

    U.S. GEOLOGICAL SURVEY. KINNEY QUADRANGLE (TOPOGRAPHIC

  • Deposit

    MAP), MINNESOTA--ST. LOUIS CO. 7.5 MINUTE SERIES, 1951,

  • Deposit

    SCALE 1:24,000.

  • Deposit

    -----. VIRGINIA QUADRANGLE (TOPOGRAPHIC MAP), MINNESOTA--

  • Deposit

    ST. LOUIS CO. 7.5 MINUTE SERIES, 1951, SCALE 1:24,000.

  • Deposit

    VANDELINDER, M. D. SOLVING MAINTENANCE PROBLEMS. MINING

  • Deposit

    CONGRESS JOURNAL, DECEMBER 1977, PP. 47-49 AND 53-54.

  • Deposit

    WIDMAYER, D. F. THE MINNTAC STORY, DEVELOPMENT AND OPERA-

  • Deposit

    TION OF U. S. STEEL'S TACONITE FACILITY. SKILLINGS' MI-

  • Deposit

    NING REVIEW, APR. 4, 1970, FRONT COVER AND PP. 10-11.

  • Deposit

    HAATAJA, P. G., D. F. HENDRICKS, AND N. A. BRASCUGLI. TRUCK

  • Deposit

    -TO-RAIL TRANSFER AT MINNTAC. SKILLINGS' MINING REVIEW,

  • Deposit

    APR. 11, 1987, PP. 4-8.

  • Deposit

    JANSEN, K., B. KNIIVILA, T. LERICK, AND A. B. ANDREWS. IM-

  • Deposit

    PROVEMENTS IN BLASTING PRACTICES AT MINNTAC MINE. SKIL-

  • Deposit

    LINGS' MINING REVIEW, AUG. 25, 1984, PP. 6-12.

  • Deposit

    SKILLINGS, D. N., JR. U. S. STEEL CORP., IN MINNESOTA IRON

  • Deposit

    ORE OPERATIONS IN 1981. SKILLINGS' MINING REVIEW, AUG.

  • Deposit

    8, 1981, P. 16.

  • Deposit

    _____. U. S. STEEL CORP., IN MINNESOTA IRON ORE OPERATIONS

  • Deposit

    MARKED BY CUTBACKS IN 1982. SKILLINGS' MINING REVIEW,

  • Deposit

    AUG. 7, 1982, PP. 10-11.

  • Deposit

    REMAIN AFFECTED BY PRODUCTION CUTBACKS AND SHUTDOWNS IN

  • Deposit

    1983. SKILLINGS' MINING REVIEW, JULY 30, 1983, PP. 10-

  • Deposit

    12.

  • Deposit

    IMPROVING FURTHER IN THIRD YEAR OF RECOVERY. SKILLINGS'

  • Deposit

    MINING REVIEW, JULY 28, 1984, PP. 11-12.

  • Deposit

    _____. U. S. STEEL CORP., IN U.S. IRON ORE INDUSTRY CONTIN-

  • Deposit

    UING TO OPERATE AT 50 MILLION TON PRODUCTION LEVEL IN

  • Deposit

    1985. SKILLINGS' MINING REVIEW, JULY 27, 1985, P. 16.

  • Deposit

    _____. USS, UNIT OF USX CORP., IN U.S. IRON ORE PRODUCTION

  • Deposit

    ESTIMATED AT 41 MILLION GROSS TON LEVEL IN 1986 WITH SEC-

  • Deposit

    OND HALF SLOWDOWN IN STEEL INDUSTRY. SKILLINGS' MINING

  • Deposit

    REVIEW, JULY 26, 1986, PP. 16-17.

  • Deposit

    _____. USS, DIVISION OF USX CORP., IN U.S. IRON ORE INDUS-

  • Deposit

    TRY TO RECOVER MODERATELY IN 1987 TO LEVEL OF 45 MILLION

  • Deposit

    GROSS TONS OF PELLETS AND ORE. SKILLINGS' MINING REVIEW,

  • Deposit

    JULY 25, 1987, P. 18.

  • Deposit

    _____. USX CORP., IN NORTH AMERICAN IRON ORE INDUSTRY IN

  • Deposit

    MAJOR RECOVERY IN 1988 TO REACH SEVEN-YEAR PRODUCTION

  • Deposit

    PEAK OF 97.6 MILLION GROSS TONS. SKILLINGS' MINING RE-

  • Deposit

    VIEW, JULY 30, 1988, PP. 15-16.

  • Deposit

    SKILLINGS' MINING REVIEW. MINNTAC PLANT TO TEST SAWDUST AS

  • Deposit

    FUEL IN PELLETIZING KILN. DEC. 14, 1985, P. 7.

  • Deposit

    _____. MINNTAC ENGINEERS DESIGN FLOATS TO PROTECT CLARIFIER

  • Deposit

    PONDS. JAN. 30, 1988, P. 8.

  • Deposit

    ST. LOUIS COUNTY MINE INSPECTOR. THE ANNUAL REPORT OF THE

  • Deposit

    INSPECTOR OF MINES, ST. LOUIS COUNTY, MINNESOTA (1977-

  • Deposit

    1987 REPORTS).

  • Deposit

    USX CORPORATION, USS DIVISION. PERSONAL COMMUNICATION WITH

  • Deposit

    LEE OSMONSON BY COMPANY REPRESENTATIVES DURING VISIT TO

  • Deposit

    THE MINNTAC MINE IN MARCH 1988.

  • Deposit

    WEINERT, J. D., AND R. W. SALMI. RECENT APPLICATIONS OF

  • Deposit

    FINE SCREENS AT MINNTAC. SKILLINGS' MINING REVIEW, JUNE

  • Deposit

    23, 1984, PP. 4-9.

Reporter information

Type Date Name Affiliation Comment
Reporter 07-OCT-96 Osmonson U.S. Bureau of Mines