1. Mineral Resources
  2. Online Spatial Data
  3. Mineral Resource Data System (MRDS)

Broken Ladder

Past Producer in Del Norte county in California, United States with commodity Chromium
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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. Nearby scientific data
  8. Ore body information
  9. Economic information about the deposit and operations
  10. Mining district
  11. Mineral rights holdings
  12. Land status
  13. Ownership information
  14. Workings at the site
  15. Links to other databases
  16. Bibliographic references
  17. Reporter information

Geologic information

Identification information

Deposit ID 10259763
MAS/MILS ID 0060150258
Record type Site
Current site name Broken Ladder

Geographic coordinates

Point of reference Ore Body
Geographic coordinates: -124.04146, 41.90812 (WGS84)
Elevation 600
Location accuracy 100(meters)

Site location context

Political divisions (FIPS codes)

Del Norte(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

High Divide(quadrangle 1:24,000 scale)

Crescent City(quadrangle 1:100,000 scale)

Crescent City(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Smith(hydrologic unit)

Northern California Coastal(hydrologic accounting unit)

Klamath-Northern California Coastal(hydrologic subregion)

California(hydrologic region)

Federal lands

Six Rivers National Forest(National Forest)

National Forest FS(Type of land area)

FS(Federal land areas administered by FS)

Geographic areas

Country State County
United States California Del Norte

Public Land Survey System information

Meridian Township Range Section Fraction State
Humboldt 018 N 011 W 35 California

Commodities

Commodity Importance
Chromium Critical Primary

Nearby scientific data

Ore Body (1) -124.04146, 41.90812
ListMap

Economic information

Ore body information

  • Area 100HA
    Field Value
    Total Surface Area (HA) 100
    Date of Last Modification 910418

Economic information about the deposit and operations

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

Mining district

District name High Divide

Mineral rights holdings

Type of mineral rights Located Claim

Land status

Ownership category BLM Administrative Area

Ownership information

  • Type Owner
    Owner Del Norte Chrome Ltd.
    Interest 100
    Year 1986

Workings at the site

  • Type of workings Surface
    Area 50HA
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method PROPOSED
    Mining Method OPEN PIT
    Swell Factor .65
    Percent Waste Rock 32.4
    Avg. Overburden Thickness 0
    Primary Material Cover SAND, SILT
    Percentage 1
    Hardness of Ore M-HARD ROCKS
    Avg. Bench Height (meters) 10
    Max. Pit Slope (degrees) 45
    Capacity 350
    Capacity Units MT ORE/DAY
    Preprod. Stripping Vol. 0
    Unit Production Cost 5.62
    Units of Production $/MT ORE
    Operating Days per Year 260
    Operating Shifts per Day 2
    Year of Information 1986

Reference information

Bibliographic references

  • Deposit

    ELLIS, R.K. PODIFORM CHROMITE OCCURENCES IN THE JOSEPHINE

  • Deposit

    KLAMATH MTNS. M.S. THESIS, UNPUB. 1977.

  • Deposit

    KLEIN, C.W. THE GEOLOGY OF THE HAPPY CAMP AREA, SISKIYOU CO.

  • Deposit

    PHD DISS., UNPUB., 1975.

Reporter information

Type Date Name Affiliation Comment
Reporter 20-JUL-1992 Wetzel, Nicholas U.S. Bureau of Mines

Beyond USGS

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

Maps centered on this site

Authoritative California resources

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