Bulldog Mine Operation

The Bulldog Mine Operation is a silver mine located in Mineral county, Colorado at an elevation of 9,357 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

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Site Name

Primary: Bulldog Mine Operation
Secondary: Bulldog Tunnel
Secondary: Bulldog
Secondary: Puzzle Vein

Commodity

Primary: Silver
Secondary: Lead
Tertiary: Zinc

Location

State: Colorado
County: Mineral
District: Creede District

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.

Holdings

Type: Located Claim
Type: Patented

Workings

Type: Underground

Ownership

Owner Name: Homestake Mining Co.
Company ID: 500413
Percent: 100.0
Home Office: P. O. Box 98, Creede, Co 81130
Info Year: 1975

Production

Year: 1977
Description: 54103 Mt Tailings Treated
Year: 1977
Description: 63,467 1,816 922 96 103122 Mt
Year: 1976
Description: 51,161 1,940 810 83 95937 Mt
Year: 1975
Description: 46,096 1,493 646 81 90015 Mt
Year: 1974
Description: 38,397 1,252 552 48 79808 Mt
Year: 1973
Description: 65,051 1,649 882 54 78647 Mt
Year: 1972
Description: 65,525 1,582 1,189 48 85454 Mt
Year: 1971
Description: 62,789 1,568 1,264 83 89469 Mt
Year: 1970
Description: 50,703 1,763 1,587 92 90083 Mt
Year: 1969
Description: 28,706 979 572 43 60088 Mt
Year: 1968
Description: Ag (Kg) Pb (Mt) Zn (Mt) Cu (Mt)
Year: 1968
Description: Metals In Concentrates
Year: 1981
Description: 40,434 1,111 708 79 93993 Mt
Year: 1980
Description: 46,013 918 598 45 91244 Mt
Year: 1979
Description: 55629 Mt Tailings Treated
Year: 1979
Description: 39,126 1,226 824 65 87222 Mt
Year: 1978
Description: 68179 Mt Tailings Treated
Year: 1978
Description: 65,380 1,825 709 89 99543 Mt
Year: 1983
Description: 37,248 774 - 50 71151 Mt
Year: 1982
Description: 39,352 761 160 86 80875 Mt
Year: 1985
Description: 2,911 64 - 4 6532 Mt ( Temp Closed 1/29/85)
Year: 1984
Description: 34,110 782 - 58 82048 Mt

Deposit

Record Type: Site
Operation Category: Plant
Plant Type: Leach
Operation Type: Underground
Mining Method: Filled Stopes - Horiz Cut and Fill W/Tailings
Milling Method: Flotation
Year First Production: 1969
Discovery Year: 1961
Years of Production:
Organization:
Significant: Y

Physiography

General Physiographic Area: Rocky Mountain System
Physiographic Province: Southern Rocky Mountains

Mineral Deposit Model

Model Name: Epithermal vein, Creede

Orebody

Not available

Structure

Not available

Alterations

Not available

Rocks

Not available

Analytical Data

Not available

Materials

Unknown: Argentite
Unknown: Tetrahedrite
Unknown: Sphalerite
Unknown: Silver
Unknown: Rhodochrosite
Unknown: Pyrite
Unknown: Galena
Unknown: Fluorite
Unknown: Chalcopyrite
Unknown: Barite
Unknown: Quartz

Comments

Comment (Production): PRODUCT B CONC OUTPUT YIELD BASED ON REC 01 FD GRD-92G/MT PRODUCT C CONC OUTPUT YIELD BASED ON REC 02 FD GRD-130G/MT

Comment (Reserve-Resource): MATRIX 1, COL 1, ROWS P75-10% RESERVE IS CALCULATED ON THE BASIS OF 10 YR MINE LIFE AT PRESENT PRODUCTION RATE. QUANT MATRIX ADJUSTED FOR 15% MINE RECOVERY AND 30% DILUTION M1C1 = R1 / (0.85 X 1.3) MATRIX 1 COL 1 = RES REC 1 DIVIDED BY 1.3 AND O.85 (DILUTION AND MINE RECOVERY FACTORS) MATRIX 2, COL 1, REPRESENTS OLD MINE TAILING PROCESSED AT CARBON-IN-PULP PLANT. RESERVE ESTIMATE BASED ON 227MTPD BEING FED TO PLANT 120 DAYS/YR FOR 10 YEARS M3C1=R2 MATRIX 3, COL 1 = RESERVE REC 2

Comment (Production): PRODUCT B IS SILVER PRODUCED FROM BOTH FLOAT SLIMES AND OLD MILL TAILINGS, OLD TAILINGS ARE COMBINED WITH SLIMES ONLY DURING SUMMER MONTHS (APPROX. 120 DAYS). PRODUCT C IS THE PROCESSED SLIMES FROM FLOTATION. ONLY 136 MTPD ARE PROCESSED FOR 230 DAYS.

Comment (Names): ALTERNATE NAMES: BULLDOG MOUNTAIN OPERATION, PUZZLE VEIN, BULLDOG TUNNEL

Comment (Deposit): THE GRADE IS SHOWN AS 100% BECAUSE A COMMODITY, CLEAN COAL, IS PRODUCED. PROPERTY UPDATED SEP 1987.

Comment (Production): K2 FEED GRADE REC 01 = COMBINED WEIGHTS AVERAGE BY TONNAGE INPUT TO CIP PLANT (227 MTPD, 69 G/MT OF OLD MILL TAILINGS AND 136 MTPD, 130 G/MT OF FLOAT SLIMES) WHICH GIVE A FEED GRADE OF 92 G/MT. K2 FEED GRADE REC 02 = GRADE OF FLOAT SLIMES FROM FLOAT. CELLS = 130 G/MT. MINE PRODUCTION SUSPENDED AND MINE PLACED ON STANDBY ON JAN 29, 1985. MINE PRODUCTION FROM 1969 - 1985 FROM BU MINES PRODUCTION STATISTICS

References

Reference (Workings): JACKSON, DANIEL. HOMESTAKE'S HARD WORK PAYS OFF AT BULLDOG MOUNTAIN MINE, ENG. /6 MIN. J., MAY 1974, PP. 65-70.

Reference (Reserve-Resource): HOMESTAKE MINING COMPANY 1986 ANNUAL REPORT. P. 13.

Reference (Production): MITCHELL, S., ET. AL. HOMESTAKE'S BULLDOG MTN CARBON-IN-PULP SILVER PLANT. AIME PREPRINT NO A80-21, 1980, 26 PP.

Reference (Production): HOWELL, F.M. HOMESTAKE,S BULLDOG MTN MILL, CREDE, COLO: AIME SME MEETING, ROCKY MTN MINERALS CONF, SALT LAKE CITY, UTAH, SEP 17-19, 1969. PREPRINT NO 69-B-308.

Reference (Geology): STEVEN, T. A., & RATTE, J. C., GEOLOGY & STRUCTURAL CONTROL OF ORE DEPOSITION IN THE CREEDE DISTRICT, SAN JUAN MTNS, COLORADO, USGS PROF. PAPER 487, 1965, 89 PP.

Reference (Geology): STEVEN, T. A., & RATTE, J. C., RELATION OF MINERALIZATIION TO CALDERA SUBSIDENCE IN THE CREEDE DISTRICT, SAN JUAN MTNS., COLORADO, USGS PROF. PAPER 400-B, 1960, PP. B14-17.
Pages: B14-B17

Reference (Geology): MEEVES, H. C., & DARNELL. R. P., STUDY OF THE SILVER POTENTIAL, CREEDE DISTRICT, MINERAL COUNTY, COLORADO, BUMINES IC 8370, 1970, 5B PP.

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