Boulder County Tunnel

Occurrence in Boulder county in Colorado, United States with commodities Copper, Gold, Lead, Zinc
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. Land status
  12. Ownership information
  13. Workings at the site
  14. Links to other databases
  15. Bibliographic references
  16. Reporter information

Geologic information

Identification information

Deposit ID 10141964
MAS/MILS ID 0080130010
Record type Site
Current site name Boulder County Tunnel

Geographic coordinates

Point of reference Main Entrance
Geographic coordinates: -105.55753, 39.97805 (WGS84)
Elevation 2514
Location accuracy 10000(meters)

Site location context

Political divisions (FIPS codes)

Boulder(county)

Colorado(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Nederland(quadrangle 1:24,000 scale)

Denver West(quadrangle 1:100,000 scale)

Denver(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 001 S 073 W 20 Colorado

Commodities

Commodity Importance
Copper Tertiary
Gold Tertiary
Lead Tertiary
Zinc Critical Tertiary

Materials information

Materials Type of material
Chalcopyrite Unknown
Galena Unknown
Gold Unknown
Pyrite Unknown
Quartz Unknown
Silver Unknown
Sphalerite Unknown

Nearby scientific data

Main Entrance (1) -105.55753, 39.97805

Economic information

Ore body information

  • Area 1HA
    Field Value
    Type of Orebody #1 FISSURE VEIN
    Shape of Orebody #1 OTHER
    Type of Orebody #2 SHEAR ZONE
    Primary mode of Origin CONT METASOMATIC
    Secondary mode of Origin HYDROTHERMAL
    Primary Ore Control CONTACT ZONE
    Secondary Ore Control FRACTURING
    Degree of Wallrock Alter. MODERATE
    Type of Wallrock Alter. #1 PROPYLITIC
    Total Surface Area (HA) 1
    Date of Last Modification 790430

Economic information about the deposit and operations

Operation type Underground
Development status Occurrence
Commodity type Metallic
Significant No
Discovery year 1870

Land status

Ownership category Private

Ownership information

  • Type Unknown
    Owner Allied Chemical Corp.
    Home office Colorado
    Year 1974

Workings at the site

  • Type of workings Underground
    Length 1500M
    Overall depth 125M
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method PROPOSED
    Mining Method OTHER OPEN STOPE METHODS
    Swell Factor .3
    Percent Waste Rock 15.5
    Rock Characteristics NO PLANES OF WEAKNESS
    Rock Support Chars. SUPPORTING WHEN DRY
    Mine Support Chars. CHEMICAL COATING
    Slope of Inclines 90
    1st Condition of Workings UNKNOWN
    Capacity Units MT ORE/DAY
    Units of Production $/MT ORE
    Year of Information 1963

Reference information

Bibliographic references

  • Deposit

    COLO BOM 1975 LIST

Reporter information

Type Date Name Affiliation Comment
Reporter 30-DEC-1996 Intermountain Field Operations Center (IFOC) U.S. Bureau of Mines
Updater 04-JUN-0007 Melton, Greg U.S. Geological Survey

Beyond USGS

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

External references

Authoritative Colorado resources

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