Eureka-Bulldozer Mine

The Eureka-Bulldozer Mine is a silver and gold mine located in La Plata county, Colorado at an elevation of 10,751 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

Satelite View

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Site Name

Primary: Eureka-Bulldozer Mine
Secondary: Patented Claim: Eureka, MS 1271
Secondary: Unpatented Claim: Bulldozer

Commodity

Primary: Silver
Primary: Gold
Secondary: Lead
Secondary: Copper
Tertiary: Tellurium

Location

State: Colorado
County: La Plata
District: California (La Plata) District

Land Status

Land ownership: Private
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.
Administrative Organization: San Juan N. F.

Holdings

Not available

Workings

Not available

Ownership

Not available

Production

Not available

Deposit

Record Type: Site
Operation Category: Past Producer
Deposit Type: Vein
Operation Type: Unknown
Year First Production: 1882
Year Last Production: 1914
Discovery Year: 1882
Discovery Method: Ore-Mineral In Place
Years of Production:
Organization:
Significant: N
Deposit Size: S

Physiography

General Physiographic Area: Intermontane Plateaus
Physiographic Province: Colorado Plateaus
Physiographic Section: Navajo Section

Mineral Deposit Model

Model Name: Polymetallic veins

Orebody

Not available

Structure

Type: R
Description: San Juan Uplift, Four Corners Platform

Type: L
Description: La Plata Dome

Alterations

Not available

Rocks

Name: Diorite
Role: Associated
Age Type: Associated Rock
Age Young: Paleocene

Name: Diorite
Role: Associated
Age Type: Host Rock
Age Young: Late Permian

Name: Diorite
Role: Associated
Age Type: Associated Rock Unit
Age Young: Paleocene

Analytical Data

Not available

Materials

Ore: Gold
Ore: Galena
Ore: Pyrite
Ore: Chalcopyrite
Gangue: Quartz
Gangue: Fluorite
Gangue: Chlorite

Comments

Comment (Location): (LAND STATUS AND ADMINISTRATIVE AREA LOCATIONS CALCULATED USING GIS OVERLAY ANALYSIS FOR SAN JUAN N. F.). ON SW SIDE OF LEWIS MTN NEAR HEAD OF LEWIS CREEK AND WEST OF EAGLE PASS, 2.5 MILES NE OF LA PLATA TOWNSITE (UNSURVEYED SECTION). ; INFO FROM LAND.ST :1974

Comment (Production): PARTIAL PRPDUCTION RECORD. FIGURES UNAVAILABLE FOR YEARS PRIOR TO 1887. NO RECORDS FOR 1891-1901. NO PRODUCTION REPORTED FOR 1902-1903, 1905-1912, AND AFTER 1914.

Comment (Workings): MINE WORKED BY EUREKA SHAFT AND ADIT (EXTENT UNKNOWN) AND BY DAVIE AND WATER TUNNELS. WATER TUNNEL DRIVEN N 30 E FOR 85 FT, THENCE S 78 E FOR 96 FT AND GENERALLY N 68 TO 78 W FOR 225 FT; OVERHEAD STOPE TO SURFACE LIES NW OF CROSSCUT. DAVIE TUNNEL LOCATED 260 FT SW OF WATER TUNNEL, DRIVEN N 20 E FOR 270 FT, THENCE GENERALLY EAST TO ESE FOR 260 FT; 60-FT DRIFT ON VEIN DRIVEN WNW-ESE AT 180 FT FROM PORTAL. WATER TUNNEL LIES 125 FT ABOVE GOLD KING NO. 2 LEVEL; DAVIE TUNNEL LIES 55 FT ABOVE GOLD KING NO. 2 LEVEL AND IS CONNECTED TO IT BY RAISE AT 190 FT ALONG SW BRANCH OF TUNNEL.

Comment (Deposit): COUNTRY ROCK CONSISTS OF SW-DIPPING CUTLER AND RICO FM RED BEDS INTRUDED BY DIORITE-MONZONITE PORPHYRY SILLS AND DIKES. VEIN NEAR SURFACE WAS 5 FT WIDE WITH 1-FT HIGH-GRADE ORE STREAK ON ONE WALL.

Comment (Development): FOLLOWING DISCOVERY IN 1882, MINE WORKED INTERMITTENTLY UNTIL 1914.

References

Reference (Deposit): ECKEL, E.B., AND OTHERS, 1949, GEOLOGY AND ORE DEPOSITS OF THE LA PLATA DISTRICT, COLORADO: USGS PROF. PAPER 219, P. 73-76, 119, PL. 22.

Reference (Deposit): BLM MINERAL SURVEY MS 1271

Reference (Production): ECKEL AND OTHERS, 1949, P. 119 (AS COMPILED FROM U.S. MINT, USGS, AND USBM RECORDS)

Colorado Mining Photos

Check out this collection of Colorado's best historic mining photos: Incredible Photos of Colorado Mining Scenes.