| Deposit ID | 10146672 |
|---|---|
| MRDS ID | W001392 |
| MAS/MILS ID | 0261030004 |
| Record type | Site |
| Current site name | Mather B Mine |
| Alternate or previous names | Pioneer Pellet Plant, Ore Improvement Plant |
| Related records | 10068367 |
| Point of reference | Ore Body |
|---|---|
| Geographic coordinates: | -87.62642, 46.75 (WGS84) |
| Elevation | 415 |
| Location accuracy | 500(meters) |
Political divisions (FIPS codes)
Marquette(county)
Michigan(state)
United States(country)
North America(continent)
Land(continent)
USGS map quadrangles
Negaunee NW(quadrangle 1:24,000 scale)
Marquette(quadrangle 1:100,000 scale)
Marquette(quadrangle 1:250,000 scale)
Hydrologic units (watersheds)
Dead-Kelsey(hydrologic unit)
Southcentral Lake Superior(hydrologic accounting unit)
Southern Lake Superior(hydrologic subregion)
Great Lakes(hydrologic region)
| Country | State | County |
|---|---|---|
| United States | Michigan | Marquette |
| Meridian | Township | Range | Section | Fraction | State |
|---|---|---|---|---|---|
| Michigan | 047 N | 027 W | 01 | E2NWNE | Michigan |
| Commodity | Importance |
|---|---|
| Iron | Tertiary |
| Materials | Type of material |
|---|---|
| Chert | Unknown |
| Chlorite | Unknown |
| Goethite | Unknown |
| Hematite | Unknown |
| Martite | Unknown |
| Mica | Unknown |
| Ore Body (1) | -87.62642, 46.75 |
|---|
| Strike | E00W | ||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dip | 30S | ||||||||||||||||||||||||||||||||
| Thickness | 1000M | ||||||||||||||||||||||||||||||||
| Length | 4000M | ||||||||||||||||||||||||||||||||
| Width | 1500M | ||||||||||||||||||||||||||||||||
| Area | 24HA | ||||||||||||||||||||||||||||||||
| Depth to top | 300M | ||||||||||||||||||||||||||||||||
| |||||||||||||||||||||||||||||||||
| Operation type | Underground |
|---|---|
| Development status | Past Producer |
| Commodity type | Metallic |
| Significant | No |
| Discovery year | 1844 |
| Year of first production | 1880 |
| District name | Marquette Iron District |
|---|
| Type of mineral rights | Fee Ownership |
|---|---|
| Type of mineral rights | Private Lease |
| Ownership category | Private |
|---|
| Type | Owner |
|---|---|
| Owner | Cleveland-Cliffs Iron Co. |
| ID | 2000421 |
| Interest | 32 |
| Home office | Ohio |
| Year | 1981 |
| Type | Owner |
|---|---|
| Owner | Bethlehem Steel Corp. |
| ID | 2000421 |
| Interest | 20 |
| Home office | Pennsylvania |
| Year | 1975 |
| Type | Unknown |
|---|---|
| Owner | Mc Louth Steel Corp. |
| ID | 2000421 |
| Interest | 20 |
| Home office | Michigan |
| Year | 1975 |
| Type | Owner-Operator |
|---|---|
| Owner | Cleveland-Cliffs Iron Co. |
| ID | 2000421 |
| Interest | 15 |
| Home office | Ohio |
| Year | 1975 |
| Type | Owner |
|---|---|
| Owner | Sharon Steel Corp. |
| ID | 2000421 |
| Interest | 12 |
| Home office | Pennsylvania |
| Year | 1975 |
| Type of workings | Underground | ||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Length | 7380M | ||||||||||||||||||||||||||||||||||||||
| Overall depth | 1008M | ||||||||||||||||||||||||||||||||||||||
| |||||||||||||||||||||||||||||||||||||||
| Agency | Database name | Acronym | Record ID | Notes |
|---|---|---|---|---|
| U.S. Bureau of Mines | Minerals Availability System | MAS | 0261030004 | |
| USGS | Mineral Resources Data System | MRDS | W001392 | MAS references MRDS |
| Mine Safety and Health Administration | MSHA | MSHA | 2000421 |
LETTER FROM STATE GEOLOGIST 03-05-80 STATUS=MINED OUT
-- MATHER MINE MARKS PRODUCTION OF 50 MILLIONTH TON OF IRON
SKILLINGS MINING REVIEW, V.64, NO.21, 1975, PP.1,12-15
-- MATHER BLOCK CAVES 2 MILLION LTPY, ENGINEERING AND MINING
NAL, V.175, NO.11, 1974, P.144
-- CLEVELAND-CLIFFS MICHIGAN IRON ORE OPERATIONS IN 1974, SK
MINING REVIEW, V.63, NO.22, 1974, PP.1,6
-- TEN MILLION TON MINES OF THE GREAT LAKES REGION, SKILLING
ING REVIEW, V.59, NO.33, 1970, P.27
-- PELLETIZING OF NATURAL ORES AT THE PIONEER PELLET PLANT O
CLEVELAND-CLIFFS IRON CO, 27TH ANN MEETING, AIME, 1966, PP.1
-- CLIFFS PIONEER PELLET PLANT, MARQUETTE IRON RANGE, SKILLI
MINING REVIEW, V.54, NO.36, 1965, PP.1,4-5
-- CLEVELAND-CLIFFS PROGRAM AT THE MATHER MINE / PIONEER PEL
PLANT, SKILLINGS MINING REVIEW, V.53, NO.45, 1964, PP.6-7
-- VARIOUS REPORTS ON STATISTICS AND COSTS OF MICHIGAN IRON
MICH GEOL SUR, 1952, 1954-74
-- IRON ORE, AMER IRON ORE ASSOC, CLEVELAND, OHIO, 1959-74
-- LAKE SUPERIOR IRON ORES, 2ND ED, LAKE SUPERIOR IRON ORE A
CLEVELAND, OHIO, 1952
-- HAMMES, J K, THE ECONOMICS OF PRODUCING AND DELIVERING IR
PELLETS FROM NORTH AMERICAN TYPE RESOURCES, 27TH ANN MEETING
1966, PP.9-16
RCF & CMS LISTS 10/81
NOT ON 1980 OR 1981 MSHA LISTS; ASSUME PAST PRODUCER
# ASSOCIATED WITH MILL, SEQ. NO. 0261039014
| Subject category | Comment text |
|---|---|
| Deposit | ORIGINAL EVALUATION BY MICHIGAN TECHNOLOGICAL UNIVERSITY, AD AND CORRECTIONS BY EFOC, SCHMIDT, 1976 REC 101 PAST PRODUCTION HAS AVERAGED 60.1% FE, BUT CURRENT I REC 111 BASED ON CURRENT PRODUCTION CONTINUED THROUGH 1983 REC 050 COL 22 FIRST MATHER B PRODUCTION IN 1951 REC 120 COL 58 BASED ON 2,032,000 MT PER YEAR, 277 DAYS PER REC 120 COL 69 15 MILLION CAPITAL COST IN 1963 UPDATED TO 19 BLS INDEX (REC 700) REC 150 FOR ORE IMPROVEMENT PLANT. CAPITAL COST INCLUDED WIT PIONEER PELLET PLANT REC 151 FOR PIONEER PELLET PLANT. CAPITAL COST DERIVED FROM SHIPPED CONVERTED TO ORENNAGES FROM REC 700 REC 160-166 PIONER IS PIONEER PELLET PLANT AND ORE IMPROVEME PLANT, TRENT IS TRENTON, L.E.P. IS LAKE ERIE PORT, BUFF IS B S CHI IS SOUTH CHICAGO, CLEVE IS CLEVELAND, SFL.ML IS UNSPEC STEEL MILL |
| Type | Date | Name | Affiliation | Comment |
|---|---|---|---|---|
| Reporter | 28-FEB-1986 | Mi-Tech-U | U.S. Bureau of Mines |
Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.
| Status | Abandoned since 05/05/1980 |
|---|---|
| MSHA mine ID | 2000421 |
| Mine name (MSHA) | Mather Ug Or Mather B |
| Current operator | Cleveland-Cliffs Iron Company |
| Current controller (parent) | Cleveland-Cliffs Inc |
| Mine type | Surface (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.
MRDS records operators as of each record's last update (≤ 2019). Some of the operators listed here have since changed hands or dissolved:
Curated by qvyshift.com from publicly-reported M&A activity (SEC filings, press releases, USGS Mineral Yearbooks). Not authoritative — verify against primary sources before relying on it. The MSHA panel above is the current authoritative source for actively-permitted mines.