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Sunnyside

Past Producer in San Juan county in Colorado, United States with commodities Copper, Gold, Lead, Manganese, Silver, Zinc
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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. Nearby scientific data
  9. Ore body information
  10. Economic information about the deposit and operations
  11. Mining district
  12. Mineral rights holdings
  13. Land status
  14. Ownership information
  15. Production statistics
  16. Reserves and resources
  17. Workings at the site
  18. Links to other databases
  19. Bibliographic references
  20. General comments
  21. Reporter information

Geologic information

Identification information

Deposit ID 10167210
MAS/MILS ID 0081110002
Record type Site
Current site name Sunnyside
Alternate or previous names Washington Mine, American Tunnel, Sunnyside Mine Group, Belle Creole, Gold Prince, Brenneman Mine, Mogul Mine

Geographic coordinates

Point of reference Ore Body
Geographic coordinates: -107.61234, 37.89561 (WGS84)
Elevation 3780
Location accuracy 100(meters)

Site location context

Political divisions (FIPS codes)

San Juan(county)

Colorado(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Handies Peak(quadrangle 1:24,000 scale)

Silverton(quadrangle 1:100,000 scale)

Durango(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Animas(hydrologic unit)

Upper San Juan(hydrologic accounting unit)

San Juan(hydrologic subregion)

Upper Colorado(hydrologic region)

Federal lands

Bureau of Land Management(Bureau of Land Management CO)

Bureau of Land Management CO BLM(Type of land area)

BLM(Federal land areas administered by BLM)

Geographic areas

Country State County
United States Colorado San Juan

Public Land Survey System information

Meridian Township Range Section Fraction State
New Mexico 042 N 007 W 14 Colorado

Commodities

Commodity Importance
Copper Secondary
Gold Primary
Lead Secondary
Manganese Critical Tertiary
Silver Secondary
Zinc Critical Secondary

Materials information

Materials Type of material
Adularia Unknown
Argentite Unknown
Calcite Unknown
Chalcopyrite Unknown
Chlorite Unknown
Epidote Unknown
Fluorite Unknown
Galena Unknown
Gold Unknown
Kaolinite Unknown
Pyrite Unknown
Quartz Unknown
Rhodochrosite Unknown
Rhodonite Unknown
Sericite Unknown
Sphalerite Unknown

Nearby scientific data

Ore Body (1) -107.61234, 37.89561
ListMap

Economic information

Ore body information

  • Dip 80N
    Thickness 4.6M
    Length 1850M
    Width 610M
    Area 30HA
    Depth to top 50M
    Field Value
    Type of Orebody #1 FISSURE VEIN
    Shape of Orebody #1 TABULAR
    Type of Orebody #2 SHEAR ZONE
    Shape of Orebody #2 IRREGULAR
    Type of Orebody #3 BRECCIA FILL
    Primary mode of Origin HYDROTHERMAL
    Primary Ore Control FRACTURING
    Secondary Ore Control CONTACT ZONE
    Degree of Wallrock Alter. MODERATE
    Type of Wallrock Alter. #1 SILICIFICATION
    Type of Wallrock Alter. #2 CARBONITIZATION
    Strike And Dip :80N
    Minimum Depth to Top 0
    Avg. Thick. Unconsol. Mat. 1
    Min. Thick. Unconsol. Mat. 0
    Total Surface Area (HA) 30
    Date of Last Modification 900308

Comments on the geologic information

  • THE STRIKE OF THE SUNNYSIDE VEIN VARIES FROM N 50 E THRU EAST-WEST TO N 40 W IN ARCUATE STRIKE. INTERIOR DIP 80

Economic information about the deposit and operations

Operation type Surface-Underground
Development status Past Producer
Commodity type Metallic
Significant Yes
Discovery year 1872
Mining method Shrinkage Methods - Overhand Shrinkage
Year of first production 1873
Milling method Flotation

Mining district

District name Eureka District

Mineral rights holdings

Type of mineral rights Patented
Type of mineral rights Private Lease
Type of mineral rights Located Claim

Land status

Ownership category National Forest

Ownership information

  • Type Owner-Operator
    Owner Echo Bay Mines Ltd.
    ID 500417
    Interest 50
    Home office Canada
    Year 1994
  • Type Owner
    Owner Washington Mining Co
    ID 500417
    Interest 50
    Home office Colorado
    Year 1994
  • Type Owner
    Owner Sunnyside Gold Corp.
    Home office Colorado
    Year 1996

Comments on the ownership information

  • PRODUCTION IS ONGOING 1980 - 1987 PRODUCTION DATA FRM BU MINES PRODUCTION STATISTICS INVEST REC 1016: UNDGRD MINE OP COSTS INCLUDE UNDGRD MINE TRANS COST. INVEST REC 1026: SURFACE MINE OP COSTS INCLUDES TRANS- PORTATION COST FROM MINE TO MILL. INVEST REC 1054: ROYALTY PAYMENT TO STANDARD METALS COMPANY AS PART OF 1985 PURCHASE AGREEMENT BY ECHO BAY MINES. THE NET PROFITS INTEREST IS TO BE CALCULATED AFTER DEDUC- TING CERTAIN ITEMS INCLUDING THE $20 MILLION PURCHASE PRICE, CAPITAL EXPENDITURES AND OPERATING AND ADMINISTRA- TION COSTS. IN 1988 THRU 1992, IF THE AVERAGE PRICE OF GOLD AS REPORTED BY THE COMEX FOR THE IMMEDIATELY PRECE- DING YEAR IS NOT LESS THAN $375 PER OZ ($12.06 PER GR), ALTA BAY WILL BE OBLIGATED TO PAY STANDARD METALS A MINUMUM ROYALTY OF $300,000/YR IF SUCH ROYALTY WOULD OTHERWISE BE REDUCED BELOW THAT AMOUNT AS A RESULT OF CAPITAL AND OTHER EXPENDITURES MADE IN SUCH YEAR. ECHO BAY HAS MADE ADVANCE ROYALTY PAYMENTS OF $1,250,000 WHICH WILL BE DEDUCTED, TOGETHER WITH ACCUMULATED INTEREST FROM THE NET PROFITS INTEREST BEGINNING IN 1991. (REF: ECHO BAY MINES 1987 ANN REPT, P. 58) SUNNYSIDE ALSO CUSTOM MILLS 18 MT/D ORE FROM GOLD KING EXTENSION (ADJACENT MINE OWNED BY GOLD KING CONSOLIDATED: FEED GRDS = 6.9 G/MT AU, 86 G/MT AG, 0.3% PB, 1% CU, 0.2% ZN. ALTA BAY VENTURE IS A JOINT VENTURE COMPANY CONSISTING OF ALTA GOLD COMPANY (60% OWNER) AND ECHO BAY MINES (40% OWNER). ECHO BAY PURCHASED SUNNYSIDE MINE FROM STANDARD METALS FOR $20 MILLION AND 30% OF NET PROFITS - SEE COM- MENT LINES I024-I056

Production statistics

  • Year 0
    Description Metals Recovered
  • Year 1
    Description Au,Kg Ag, Kg Pb,Mt Cu,Mt Zn,Mt
  • Year 2
    Description _____ ______ _____ _____ _____
  • Year 1980
    Description 630 4,580 2,100 230 2,300 99000 Mt Ore Milled
  • Year 1981
    Description 1,050 6,510 2,460 380 3,320 168740 Mt Ore Milled
  • Year 1982
    Description 1,320 8,670 4,040 400 5,560 213190 Mt Ore Milled
  • Year 1983
    Description 1,220 10,520 3,890 480 5,000 195950 Mt Ore Milled
  • Year 1984
    Description 1,030 9,750 4,730 600 5,660 165650 Mt Ore Milled
  • Year 1985
    Description 140 1,040 470 80 610 24760 Mt Ore Milled
  • Year 1986
    Description 690 6,570 2,370 410 3,150 133020 Mt Ore Milled
  • Year 1987
    Description 1,440 13,910 5,250 780 5,640 232210 Mt Ore Milled

Comments on the production information

  • PRODUCTION IS ONGOING 1980 - 1987 PRODUCTION DATA FRM BU MINES PRODUCTION STATISTICS INVEST REC 1016: UNDGRD MINE OP COSTS INCLUDE UNDGRD MINE TRANS COST. INVEST REC 1026: SURFACE MINE OP COSTS INCLUDES TRANSPORTATION COST FROM MINE TO MILL. INVEST REC 1054: ROYALTY PAYMENT TO STANDARD METALS COMPANY AS PART OF 1985 PURCHASE AGREEMENT BY ECHO BAY MINES. THE NET PROFITS INTEREST IS TO BE CALCULATED AFTER DEDUCTING CERTAIN ITEMS INCLUDING THE $20 MILLION PURCHASE PRICE, CAPITAL EXPENDITURES AND OPERATING AND ADMINISTRATION COSTS. IN 1988 THRU 1992, IF THE AVERAGE PRICE OF GOLD AS REPORTED BY THE COMEX FOR THE IMMEDIATELY PRECE- DING YEAR IS NOT LESS THAN $375 PER OZ ($12.06 PER GR), ALTA BAY WILL BE OBLIGATED TO PAY STANDARD METALS A MINUMUM ROYALTY OF $300,000/YR IF SUCH ROYALTY WOULD OTHERWISE BE REDUCED BELOW THAT AMOUNT AS A RESULT OF CAPITAL AND OTHER EXPENDITURES MADE IN SUCH YEAR. ECHO BAY HAS MADE ADVANCE ROYALTY PAYMENTS OF $1,250,000 WHICH WILL BE DEDUCTED, TOGETHER WITH ACCUMULATED INTEREST FROM THE NET PROFITS INTEREST BEGINNING IN 1991. (REF: ECHO BAY MINES 1987 ANN REPT, P. 58) SUNNYSIDE ALSO CUSTOM MILLS 18 MT/D ORE FROM GOLD KING EXTENSION (ADJACENT MINE OWNED BY GOLD KING CONSOLIDATED: FEED GRDS = 6.9 G/MT AU, 86 G/MT AG, 0.3% PB, 1% CU, 0.2% ZN. ALTA BAY VENTURE IS A JOINT VENTURE COMPANY CONSISTING OF ALTA GOLD COMPANY (60% OWNER) AND ECHO BAY MINES (40% OWNER). ECHO BAY PURCHASED SUNNYSIDE MINE FROM STANDARD METALS FOR $20 MILLION AND 30% OF NET PROFITS - SEE COM- MENT LINES I024-I056 PRODUCT REC E: GOLD-SILVER SPONGE AMALGAM. THE PERCENTAGE OF GOLD TO GOLD-SILVER CONTENT IS 81%, AND SILVER IS 19% THE ACTUAL GRADE OF SILVER OR GOLD IN THE MERCURY AMALGAM IS NOT KNOWN. AMALGAM SOLD ON BASIS OF GOLD-SILVER CON- TENT.
  • PRODUCTION IS ONGOING 1980 - 1987 PRODUCTION DATA FROM U.S. BUREAU OF MINES PRODUCTION STATISTICS

Reserves and resources

  • Type In-situ
    Estimate year 1991
    Indicated 264000mt ore
    Demonstrated 264000mt ore
    Total resources 264000mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 5.68 g/mt Gold Major 1991
  • Type In-situ
    Estimate year 1980
    Measured 9432600mt ore
    Demonstrated 9432600mt ore
    Total resources 9432600mt ore
    Commodity Subtype Grade units Group Importance Year
    Manganese Mn 10 wt-pct Manganese Trace 1980

Comments on the reserve resource information

  • UPDATED PEFR RECEIVED FEB.1990. WILL BE INCLUDED IN 1992 AU STUDY. OTHER NAMES: SUNNYSIDE MINE (GROUP), BELLE CREOLE MINE, GOLD PRINCE MINE, WASHINGTON MINE, BRENNEMAN MINE, MOGUL MINE. INCLUDES SAN JUAN 0081110001 PURCHASED BY ECHO BAY MINES IN 1985/1986. PRESENT (1992) OWNERSHIP 50% ECHO BAY MINES / 50% WASHINGTON MINING. 1991 RES.= 291,000 ST (264,000 MT) @ .166 OZ/ST (5.68 G/MT) TAKEN FROM ECHO BAY 1990 ANN.REP. - (8 JUNE 93) NOTE: AG, PB, ZN AND CU GRADES FROM QUANTITY MATRICES 1 & 2

Workings at the site

  • Type of workings Surface
    Area 1HA
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method ACTUAL
    Mining Method OPEN PIT
    Hardness of Ore M-HARD ROCKS
    Capacity 478
    Capacity Units MT ORE/DAY
    Unit Production Cost 24
    Units of Production $/MT ORE
    Operating Days per Year 113
    Operating Shifts per Day 2
    Year of Information 1988
  • Type of workings Underground
    Length 2400M
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method ESTIMATE
    Mining Method OVERHAND SHRINKAGE 10-67
    Swell Factor .57
    Percent Waste Rock 30
    Percent Recovery 92
    Hardness of Rock HARDROCK WITH LITTLE WATER
    Rock Characteristics ONE SYSTEM OF WEAKNESS PLANES
    Rock Support Chars. SUPPORTING MAY BACK SLAB
    Mine Support Chars. POST, HEADBOARD, CAPS, ROOF BOLTS
    Length of Inclines (m) 285
    Slope of Inclines 80
    Number of Inclines 1
    Avg. Length of Adits (m) 2400
    Number of Adits 2
    1st Condition of Workings OPEN
    2nd Condition of Workings PART ACCESSIBLE
    Capacity 550
    Capacity Units MT ORE/DAY
    Unit Production Cost 53.69
    Units of Production $/MT ORE
    Operating Days per Year 300
    Operating Shifts per Day 2
    Year of Information 1988
  • Type of workings Underground
    Field Value
    MAS Development Schedule # 2
    Mining Record # 1
    Status of Mining Method PROPOSED
    Mining Method SHRINKAGE METHODS
    Swell Factor .57
    Percent Waste Rock 0
    Percent Recovery 50
    Hardness of Rock HARDROCK WITH LITTLE WATER
    Rock Characteristics ONE SYSTEM OF WEAKNESS PLANES
    Rock Support Chars. SUPPORTING WHEN DRY
    Mine Support Chars. POST, HEADBOARD, CAPS, ROOF BOLTS
    Length of Inclines (m) 285
    Slope of Inclines 80
    Number of Inclines 1
    Avg. Length of Adits (m) 2400
    Number of Adits 2
    1st Condition of Workings OPEN
    2nd Condition of Workings PART ACCESSIBLE
    Capacity 2540
    Capacity Units MT ORE/DAY
    Unit Production Cost 14.92
    Units of Production $/MT ORE
    Operating Days per Year 250
    Operating Shifts per Day 2
    Year of Information 1980

Comments on other economic factors

  • PRODUCTION IS ONGOING 1980 - 1987. (REF: ECHO BAY MINES 1987 ANN REPT, P. 58) SUNNYSIDE ALSO CUSTOM MILLS 18 MT/D ORE FROM GOLD KING EXTENSION (ADJACENT MINE OWNED BY GOLD KING CONSOLIDATED: FEED GRDS = 6.9 G/MT AU, 86 G/MT AG, 0.3% PB, 1% CU, 0.2% ZN.
  • FEED GRADES FROM DEV SCH 1, MILL REC 1 ARE BLENDED FEED GRADES FROM SUNNYSIDE SURF & UNDGRD ORES AND GOLD KING EXTENSION ORES.

Reference information

Bibliographic references

  • Geology

    YOUNG, WILLIAM E., MANGANESE OCCURRENCES IN THE EUREKA-

  • Geology

    ANIMAS FORKS AREA OF THE SAN JUAN MTNS, SAN JUAN COUNTY,

  • Geology

    COLORADO. BU MINES IC 8303, 1966, 52 PP.

  • Deposit

    MURPHY, J. A. THE SAN JUAN MTNS OF COLORADO, MINERALOG-

  • Deposit

    ICAL RECORD, NOV-DEC 1979, PP. 349-361

  • Production

    AGEY, W. W., C. H. SCHACK & J. B. CLEMMER. METALLURGICAL

  • Production

    STUDIES OF RHODONITE ORES, SILVERTON DISTRICT, COLORADO,

  • Production

    BU MINES RI 6055 (PART 1), 1962, 16PP.

  • Reserve-Resource

    ECHO BAY MINES 1986 ANNUAL REPORT, P. 14.

  • Deposit

    BIRD, ALLEN G., NEW GOLD-SILVER DISCOVERIES AT THE

  • Deposit

    SUNNYSIDE MINE, SAN JUAN COUNTY, COLORADO, COLORADO MINING

  • Deposit

    IATION, 1975 MINING YEARBOOK, 1976, PP. 83-84.

  • Deposit

    BAARS,D.L.,AND SEE,P.D.,1968, PRE-PENNSYLVANIAN STRATIGRAPHY

  • Deposit

    PALEOTECTONICS OF THE SAN JUAN MOUNTAINS, SOUTHWESTERN CO

  • Deposit

    GEOL. SOC. AMER. BULL., V.79, P. 333-349

  • Deposit

    BASTIN, E.S.,1923, SILVER ENRICHMENT IN THE SAN JUAN MOUNTAI

  • Deposit

    COLORADO: USGS BULL. 735-D, P.65-129

  • Deposit

    BEJNAR,W., 1949, LITHOLOGIC CONTROL OF ORE DEPOSITS IN THE S

  • Deposit

    MOUNTAINS COLORADO: COMPASS, V.26, P. 117-130

  • Deposit

    BURBANK, W.S.,1930, REVISION OF GEOLOGIC STRUCTURE AND STRAT

  • Deposit

    IN THE OURAY DISTRICT OF COLORADO, AND ITS BEARING ON ORE

  • Deposit

    SITION: COLO. SCI. SOC. PR., V.12, NO. 6, P. 151-232

  • Deposit

    -------,1933,VEIN SYSTEMS OF THE ARRASTRE BASIN AND REGIONAL

  • Deposit

    LOGIC STRUCTURE OF THE SILVERTON AND TELLURIDE QUADRANGLE

  • Deposit

    COLORADO: COLO. SCI. SOC. PR., V. 13, NO. 5 P. 135-214

  • Deposit

    -------,1933, THE WESTERN SAN JUAN MOUNTAINS, IN COLORADO: 1

  • Deposit

    INT. GEOL. CONG. GUIDEBOOK 19, P. 34-63

  • Deposit

    -------,1940,STRUCTURAL CONTROL OF ORE DEPOSITITION IN THE

  • Deposit

    UNCOMPAHGRE DISTRICT, OURAY COUNTY, COLORADO: USGS BULL.

  • Deposit

    P. 189-265

  • Deposit

    -------,1941, STRUCTURAL CONTROL OF ORE DEPOSITION IN THE RE

  • Deposit

    MOUNTAINS, SNEFFELS AND TELLURIDE DISTRICTS OF THE SAN JU

  • Deposit

    MOUNTAINS, COLORADO: COLO. SCI. SOC. PR., V.14, NO.5, P.

  • Deposit

    -------,1950, PROBLEMS OF WALLROCK ALTERATION IN SHALLOW VOL

  • Deposit

    ENVIROMENTS, IN VAN TUYL AND KUHN, EDITORS, APPLIED GEOLO

  • Deposit

    COLORADO SCHOOL OF MINES QUARTERLY, V.45, NO.1B, P. 287-3

  • Deposit

    -------,1951, THE SUNNYSIDE, ROSS BASIN, AND BONITA FAULT SY

  • Deposit

    AND THEIR ASSOCIATED ORE DEPOSITS, SAN JUAN COUNTY, COLOR

  • Deposit

    COLO. SCI. SOC. PR. V. 13, NO. 7, P. 285-304

  • Deposit

    -------,1960, PRE-ORE PROPYLIZATION, SILVERTON CALDERA, COLO

  • Deposit

    USGS PAPER 400-B, P. B12-B13

  • Deposit

    BURBANK,W.S. AND LUEDKE,R.G.,1961, ORIGIN AND EVOLUTION OF O

  • Deposit

    FORMING SOLUTIONS, SILVERTON CALDERA, SAN JUAN MOUNTAINS,

  • Deposit

    COLORADO: USGS PROF. PAPER 424-C, P. C7-C11

  • Deposit

    -------,1966, GEOLOGIC MAP OF THE TELLURIDE QUADRANGLE, SOUT

  • Deposit

    ERN COLORADO: USGS GEOL QUAD MAP, GQ 504, 1:24000

  • Deposit

    -------,1968, GEOLOGY AND ORE DEPOSITS OF THE WESTERN SAN JU

  • Deposit

    MOUNTAINS,COLORADO, IN RIDGE,J.D. ED., ORE DEPOSITS OF TH

  • Deposit

    UNITED STATES, 1933-1967, (GRATON-SALES VOLUMES): CHAP. 3

  • Deposit

    V.1 1880 P.

  • Deposit

    -------,1970, GEOLOGY AND ORE DEPOSITS OF EUREKA AND ADJOINI

  • Deposit

    DISTRICTS, SAN JUAN MTNS, COLORADO: USGS PROF. PAPER 535,

  • Deposit

    BURBANK, W.S. AND OTHERS, 1947, THE SAN JUAN REGION, IN VAND

  • Deposit

    J.W., ED., MINERAL RESOURCES OF COLORADO: STATE OF COLORA

  • Deposit

    MINERAL RESOURCES BD.

  • Deposit

    COLLINS, G.E.,1931, LOCALIZATION OF OREBODIES AT RICO AND RE

  • Deposit

    MOUNTAINS, COLORADO, AS CONDITIONED BY GEOLOGIC STRUCTURE

  • Deposit

    HISTORY: COLO. SCI. SOC. PR., V.12, NO. 12, P. 407-424

  • Deposit

    CROSS, W., AND LARSEN,E.S., 1935, A BRIEF REVIEW OF THE GEOL

  • Deposit

    THE SAN JUAN REGION OF SOUTHWESTERN COLORADO: USGS BULL.

  • Deposit

    189 P.

  • Deposit

    CROSS, W., AND PURRINGTON, C.W., 1899 TELLURIDE FOLIO, COLOR

  • Deposit

    USGS GEOL. ATLAS, FOLIO 57, 19P.

  • Deposit

    CROSS, W., AND OTHERS, 1905, SILVERTON FOLIO, COLORADO: USGS

  • Deposit

    ATLAS, FOLIO 120, 34 P.

  • Deposit

    -------,OURAY FOLIO, COLORADO: USGS GEOL. ATLAS FOLIO 153 20

  • Deposit

    IRVING, J.D., 1905, ORE DEPOSITS OF THE OURAY DISTRICT, COLO

  • Deposit

    USGS BULL. 260, P. 50-77

  • Deposit

    KELLEY, V.C., 1946, GEOLOGY, ORE DEPOSITS AND MINES OF THE M

  • Deposit

    POINT, POUGHKEEPSIE, AND UPPER UNCOMPAHGRE DISTRICTS, OUR

  • Deposit

    JUAN, AND HINSDALE COUNTIES, COLORADO: COLO. SCI. SOC. PR

  • Deposit

    14, NO. 7, P. 287-466

  • Deposit

    KELLY, V. C., AND SILVER C., 1946, STAGES AND EPOCHS OF MINE

  • Deposit

    ZATION IN THE SAN JUAN MOUNTAINS, COLORADO, AS SHOWN AT T

  • Deposit

    DUNMORE MINE, OURAY COUNTY, COLORADO: ECON. GEOL., V. 41

  • Deposit

    159

  • Deposit

    KOTTLOWSKI, F.E. EDITOR, 1957, GUIDEBOOK TO THE GEOLOGY OF T

  • Deposit

    SOUTHWESTERN SAN JUAN MOUNTAINS, COLORADO: NEW MEXICO GEO

  • Deposit

    8TH FIELD CONF., GUIDEBOOK, P. 102-207, 217-221

  • Deposit

    LARSEN, E.S. JR., AND CROSS, W., 1956, GEOLOGY AND PETROLOGY

  • Deposit

    SAN JUAN REGION, SOUTHWESTERN COLORADO: USGS P. PAPER 258

  • Deposit

    LIPMAN, P.W. AND OTHERS,1970, VOLCANIC HISTORY OF THE SAN JU

  • Deposit

    COLORADO, AS INDICATED BY POTASSIUM-ARGON DATING: GEOL. S

  • Deposit

    AMER. BULL., V. 81, P. 2329-2352

  • Deposit

    LUEDKE, R.G., AND BURBANK, W.S. 1962, GEOLOGY OF THE OURAY Q

  • Deposit

    RANGLE, COLORADO: USGS GEOL. QUAD. 152, 1 IN TO 5280 FEET

  • Deposit

    -------, 1963, TERTIARY VOLCANIC STRATIGRAPHY IN THE WESTERN

  • Deposit

    JUAN MOUNTAINS, COLORADO: USGS P. PAPER 475C, P. C39-C44

  • Deposit

    ------, 1968, VOLCANISM AND CAULDRON DEVELOPEMENT IN THE EAS

  • Deposit

    SAN JUAN MTNS,COLORADO: COLO. SCH. OF MINES QUART., V.63

  • Deposit

    P. 175-208

  • Deposit

    MOEHLMAN, R.S.,1936, ORE DEPOSITION SOUTH OF OURAY, COLORADO

  • Deposit

    GEOL., V. 31 P. 377-397, 488-504

  • Deposit

    RANSOME, F.L.,1901, A REPORT ON THE ECONOMIC GEOLOGY OF THE

  • Deposit

    SILVERTON QUAD., COLORADO: USGS BULL. 182, 265 P.

  • Deposit

    SPUR,J.E.,1925,THE CAMPBIRD COMPOUND VEINDIKE: ECON. GEOL.,V

  • Deposit

    P.115-152

  • Deposit

    -------,ORE DEPOSITS IN THE CENTRAL SAN JUAN MOUNTAINS, COLO

  • Deposit

    IN RIDGE J.D. ED. ORE DEPOSITS OF THE UNITED STATES, 1933

  • Deposit

    (GRATON-SALES VOLUMES): CHAP. 33, V. 1, 1880P.

  • Deposit

    -------,1964, REVISED TERTIARY VOLCANIC SEQUENCE IN THE CENT

  • Deposit

    JUAN MTNS COLO.: USGS PROF. PAPER 475-D, P. D54-D63

  • Deposit

    VARNES, D.J.,1947,RECENT DEVELOPEMENTS ON THE BLACK BEAR VEI

  • Deposit

    MIGUEL COUNTY, COLORADO: COLO. SCI. SOC. PR., V. 15, P. 1

  • Deposit

    -------,ANALYSIS OF PLASTIC DEFORMATION ACCORDING TO VON MIS

  • Deposit

    THEORY WITH APPLICIATION TO THE SOUTH SILVERTON AREA, SAN

  • Deposit

    COUNTY, COLORADO: USGS PROF. PAPER 378-B, 49 P.

  • Deposit

    -------,GEOLOGY AND ORE DEPOSITS OF THE SOUTH SILVERTON MINI

  • Deposit

    SAN JUAN COUNTY, COLORADO: USGS PROF. PAPER 378-A, P. A1-

  • Deposit

    -------,1960, SILVERTON, COLORADO, IN RELATION OF ORE DEPOSI

  • Deposit

    DOMING IN NORTH AMERICAN CORDILLERA: GEOL. SOC. AMER. MEM

  • Deposit

    P. 26-36

  • Deposit

    MINING RECORD. AGREEMENT REACHED ON MINE SITE CLEAN-UP.

  • Deposit

    V.107/N8. FEBRUARY 2, 1996. P.12.

General comments

Subject category Comment text
Deposit SUNNYSIDE UPDATED IN FEB 1989. DEVELOPMENT SCHEDULE 2 (PROPOSED MANGANESE MINING OPERATION) DATA SET LEFT UNCHANGED FROM 1980 EVALUATION. SUNNYSIDE MINE CLOSED IN 1991.

Reporter information

Type Date Name Affiliation Comment
Reporter 30-SEP-1996 Hite, Alan G. U.S. Bureau of Mines

Beyond USGS

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

Current status (per MSHA)

StatusAbandoned since 09/15/1993
MSHA mine ID0500417
Mine name (MSHA)Sunnyside Mine/Mayflower Mill
Current operatorSunnyside Gold Corp
Current controller (parent)Echo Bay Mines Ltd
Mine typeUnderground (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.

External references

Maps centered on this site

Authoritative Colorado resources

These are landing pages for further research — the state agencies don't currently expose per-mine deep links.