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Empress Mine & Post Boy Tunnel

Past Producer in Boulder county in Colorado, United States with commodities Gold, Tungsten
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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. Controls for ore emplacement
  10. Economic information about the deposit and operations
  11. Mining district
  12. Land status
  13. Links to other databases
  14. Bibliographic references
  15. Reporter information

Geologic information

Identification information

Deposit ID 10091320
MRDS ID DC03713
MAS/MILS ID 80130281
Record type Site
Current site name Empress Mine & Post Boy Tunnel
Alternate or previous names Sylvan Ute
Related records 10262866

Geographic coordinates

Point of reference Main Entrance
Geographic coordinates: -105.38335, 40.00261 (WGS84)
Location accuracy 100(meters)
Relative position IN BLACK TIGER GULCH. Post Boy tunnel protal is at 6,500 ft elev. in the bottom of Black Tiger Gulch, 600 ft. SE of Pueblo Belle Tunnel. Empress shaft is about 200 ft west of Post Boy portal.

Site location context

Political divisions (FIPS codes)

Boulder(county)

Colorado(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Gold Hill(quadrangle 1:24,000 scale)

Estes Park(quadrangle 1:100,000 scale)

Greeley(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

St. Vrain(hydrologic unit)

South Platte(hydrologic accounting unit)

South Platte(hydrologic subregion)

Missouri(hydrologic region)

Federal lands

Arapaho and Roosevelt National Forests(National Forest)

National Forest FS(Type of land area)

FS(Federal land areas administered by FS)

Geographic areas

Country State County
United States Colorado Boulder

Public Land Survey System information

Meridian Township Range Section Fraction State
6th Principal 01N 71W 31 C of N2 of S2 Colorado

Commodities

Commodity Importance
Gold Primary
Tungsten Critical Secondary

Materials information

Materials Type of material
Gold Ore
Telluride Ore

Nearby scientific data

Main Entrance (1) -105.38335, 40.00261
ListMap

Economic information

Controls for ore emplacement

  • At Intersection Of Livingston Fault & Empress Fault. Intersection Has Been Shattered By Later Faulting To Produce An Open Zone Localizing Telluride Zones

Economic information about the deposit and operations

Operation type Underground
Development status Past Producer
Commodity type Metallic
Significant No

Mining district

District name Sugarloaf

Land status

Ownership category Private

Reference information

Bibliographic references

  • Deposit

    LANGENHEIM, 1947, CU MS THESIS, PG. 52

  • Deposit

    BLM COLO CONNECTING SHEETS

  • Deposit

    CONSV. DIV. COMP. DATE, 1,62

  • Deposit

    MINE MAP REPO # 402557, 403278, 405491, 405516

  • Deposit

    Lovering and Tweto, 1953, USGS Prof. Paper 245.

Reporter information

Type Date Name Affiliation Comment
Reporter 1973-03-01 Conservation Division Files U.S. Geological Survey
Editor 2007-05-18 Melton, Greg U.S. Geological Survey also MAS 0080130281 = 10262866
Editor 2014-01-17 Wilson, Anna B U.S. Geological Survey merged and deleted duplicate record. added reference.
Reporter 1983-11-17 Intermountain Field Operations Center (IFOC) U.S. Bureau of Mines MAS 0080130281

Beyond USGS

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

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.