Alton Tunnel

Past Producer in Boulder county in Colorado, United States with commodities Silver, Gold
Warning: This record lacks important information: bibliographic references, which we consider necessary for a comprehensive report.
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. Mineral occurrence model information
  9. Nearby scientific data
  10. Ore body information
  11. Economic information about the deposit and operations
  12. Mining district
  13. Land status
  14. Ownership information
  15. Workings at the site
  16. Links to other databases
  17. General comments
  18. Reporter information

Geologic information

Identification information

Deposit ID 10214205
MRDS ID DC03394
MAS/MILS ID 0080130016
Record type Site
Current site name Alton Tunnel
Alternate or previous names Pine Grove
Related records 10017385

Geographic coordinates

Point of reference Ore Body
Geographic coordinates: -105.5392, 39.96805 (WGS84)
Elevation 3140

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 08 NWSW Colorado

Commodities

Commodity Importance
Silver Tertiary
Gold Primary

Materials information

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

Mineral occurrence model information

Model code 46
USGS model code 15a
Deposit model name W veins

Nearby scientific data

Ore Body (1) -105.5392, 39.96805

Economic information

Ore body information

  • Area 1HA
    Field Value
    Type of Orebody #1 FISSURE VEIN
    Shape of Orebody #1 OTHER
    Primary mode of Origin CONT METASOMATIC
    Secondary mode of Origin HYDROTHERMAL
    Primary Ore Control FRACTURING
    Secondary Ore Control CONTACT ZONE
    Degree of Wallrock Alter. INTENSE
    Type of Wallrock Alter. #1 INTERM ARGILLIC
    Type of Wallrock Alter. #2 SILICIFICATION
    Total Surface Area (HA) 1
    Date of Last Modification 780213

Economic information about the deposit and operations

Operation type Underground
Development status Past Producer
Commodity type Metallic
Significant No
Discovery year 1900
Year of first production 1909

Mining district

District name Boulder Tungsten

Land status

Ownership category National Forest

Ownership information

  • Type Owner
    Owner Randal W. Wimberley 25 Minquil Dr. Newark N. J.
    Interest 100
    Home office New Jersey
    Year 1976

Workings at the site

  • Type of workings Underground
    Length 770M
    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 17.9
    Hardness of Rock HARDROCK FISSURED WITH MODERATE WATER
    Rock Characteristics NO PLANES OF WEAKNESS
    Rock Support Chars. SUPPORTING MAY BACK SLAB
    Mine Support Chars. POST, HEADBOARD, CAPS, ROOF BOLTS
    Number of Adits 3
    1st Condition of Workings SEALED
    2nd Condition of Workings PART ACCESSIBLE
    Capacity Units MT ORE/DAY
    Units of Production $/MT ORE
    Operating Days per Year 200
    Operating Shifts per Day 1
    Year of Information 1976

Reference information

General comments

Subject category Comment text
Deposit ALTON TUNNEL WAS CONNECTED TO PINE GROVE WORKINGS ABOUT 1916 MINE HAS BEEN INACTIVE SINCE ABOUT 1917 ALTON MILL-ON SITE WAS EQUIPED TO HANDLE SILVER,GOLD OR TUNG

Reporter information

Type Date Name Affiliation Comment
Reporter 27-FEB-1984 Unknown U.S. Bureau of Mines
Updater 29-MAY-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.