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Boulder City

Prospect in Clark county in Nevada, United States with commodities Aluminum, Calcium, Iron, Magnesite, Manganese, Phosphorus-Phosphates, Silica, Sulfur
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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. Ore body information
  10. Economic information about the deposit and operations
  11. Mining district
  12. Mineral rights holdings
  13. Land status
  14. Ownership information
  15. Reserves and resources
  16. Workings at the site
  17. Links to other databases
  18. Bibliographic references
  19. General comments
  20. Reporter information

Geologic information

Identification information

Deposit ID 10149339
MAS/MILS ID 0320030322
Record type Site
Current site name Boulder City

Geographic coordinates

Point of reference Main Entrance
Geographic coordinates: -114.79052, 35.9458 (WGS84)
Elevation 671
Location accuracy 10(meters)

Site location context

Political divisions (FIPS codes)

Clark(county)

Nevada(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Boulder City(quadrangle 1:24,000 scale)

Boulder City(quadrangle 1:100,000 scale)

Kingman(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Ivanpah-Pahrump Valleys(hydrologic unit)

Central Nevada Desert Basins(hydrologic accounting unit)

Central Nevada Desert Basins(hydrologic subregion)

Great Basin(hydrologic region)

Geographic areas

Country State County
United States Nevada Clark

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 023 S 064 E 23 N2NE Nevada

Commodities

Commodity Importance
Aluminum Critical Tertiary
Calcium Tertiary
Iron Secondary
Magnesite Tertiary
Manganese Critical Primary
Phosphorus-Phosphates Tertiary
Silica Tertiary
Sulfur Tertiary

Materials information

Materials Type of material
Kaolinite Unknown
Limonite Unknown
Quartz Unknown
Selenite Unknown
Wad Unknown

Nearby scientific data

Main Entrance (1) -114.79052, 35.9458
ListMap

Economic information

Ore body information

  • Strike E00W
    Dip 04S
    Thickness 18M
    Length 1158M
    Width 716M
    Depth to top 7M
    Field Value
    MAS Matrix # 1
    Shape of Orebody #1 TABULAR
    Primary mode of Origin HYDROTHERMAL
    Secondary mode of Origin SEDIMENTATION
    Primary Ore Control BEDDING
    Secondary Ore Control LITHOLOGY
    Degree of Wallrock Alter. NONE
    Strike And Dip E00W:04S
    Minimum Depth to Top 0
    Avg. Thick. Unconsol. Mat. 7
    Min. Thick. Unconsol. Mat. 0
    Date of Last Modification 830421
  • Area 400HA
    Field Value
    Type of Orebody #1 SEDIMENTARY
    Total Surface Area (HA) 400
    Date of Last Modification 850814

Comments on the geologic information

  • LINE 1 & 2 ARE GYPSIFEROUS SANDSTONE.

Economic information about the deposit and operations

Operation type Surface
Development status Prospect
Commodity type Both
Significant No
Discovery year 1941

Mining district

District name Las Vegas

Mineral rights holdings

Type of mineral rights Fee Ownership

Land status

Ownership category Municipality

Ownership information

  • Type Owner
    Owner City Of Boulder City Nevada
    Interest 100
    Home office Nevada
    Year 1980

Comments on the production information

  • MILL WILL BE FED BY THE 4 DEPOSITS: FIRST 6 YEARS: 2000MT DAY FROM 3 KIDS, 1000 MT FROM VIRGIN YEAR 7: 2000 MT DAY FROM 3 KIDS, 1000 MT DAY FROM FANNIE LAST 15 YEARS: 1770 MT DAY FROM 3 KIDS, 1230 MT FROM BOULDER MILL OUTPUT FOR 22 YEARS WILL BE 502 MT/DAY OF 46% MN NODULES 56.81/MT ORE INCLUDES $1.981MT RAIL TRANSPORT COST.

Reserves and resources

  • Type In-situ
    Estimate year 1949
    Indicated 13605000mt ore
    Demonstrated 13605000mt ore
    Total resources 13605000mt ore
    Commodity Subtype Grade units Group Importance Year
    Manganese Mn 3 wt-pct Manganese Major 1949
  • Type In-situ
    Estimate year 1949
    Indicated 5442000mt ore
    Demonstrated 5442000mt ore
    Total resources 5442000mt ore
    Commodity Subtype Grade units Group Importance Year
    Manganese Mn 4 wt-pct Manganese Major 1949
  • Type In-situ
    Estimate year 1949
    Indicated 2721000mt ore
    Demonstrated 2721000mt ore
    Total resources 2721000mt ore
    Commodity Subtype Grade units Group Importance Year
    Manganese Mn 4.5 wt-pct Manganese Major 1949
  • Type In-situ
    Estimate year 1949
    Indicated 907000mt ore
    Demonstrated 907000mt ore
    Total resources 907000mt ore
    Commodity Subtype Grade units Group Importance Year
    Manganese Mn 7.5 wt-pct Manganese Major 1949

Workings at the site

  • Type of workings Surface
    Area 400HA
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method PROPOSED
    Mining Method STRIP-LEVEL
    Swell Factor .75
    Avg. Overburden Thickness 7
    Primary Material Cover SAND, SILT
    Hardness of Ore SAND, SILT
    Max. Pit Slope (degrees) 45
    Capacity 6880
    Capacity Units MT ORE/DAY
    Unit Production Cost 7.36
    Units of Production $/MT ORE
    Operating Days per Year 250
    Operating Shifts per Day 2
    Year of Information 1980

Reference information

Bibliographic references

  • Reserve-Resource

    407. MCKELVEY, V. E., J. H. WIESE, AND V. H. JOHNSON.

  • Reserve-Resource

    PRELIMINARY REPORT ON THE BEDDED MANGANESE OF THE LAKE

  • Reserve-Resource

    MEADE REGION, NEVADA AND ARIZONA. U.S. GEOL. SURV.

  • Reserve-Resource

    BULL. 948-D, 1949, PP. 83-101.

  • Deposit

    36. BATTY, J. V., AND W. W. AGEY. CONCENTRATION OF

  • Deposit

    MANGANESE ORES FROM BOULDER DAM RECREATIONAL AREA, CLARK

  • Deposit

    COUNTY, NEVADA. BUMINES RI 4302, 1948, 12 PP.

  • Deposit

    41. BENDER, F. N., AND C. RAMPACEK. PERCOLATION

  • Deposit

    LEACHING OF MANGANESE ORES WITH SULFUR DIOXIDE. BUMINES

  • Deposit

    RI 5323, 1957, 20 PP.

  • Deposit

    267. HEWETT, D. F., AND B. N. WEBBER. BEDDED DEPOSITS OF

  • Deposit

    MANGANESE OXIDES NEAR LAS VEGAS, NEVADA. NV BUREAU OF MINES AND

  • Deposit

    GEOL. BULL. 13, 1931, 17 PP.

  • Deposit

    354. KING, W. H., AND R. R. TRENGOVE. INVESTIGATION OF

  • Deposit

    THE FANNIE RYAN AND BOULDER CITY MANGANESE DEPOSITS, CLARK

  • Deposit

    COUNTY, NEVADA. BUMINES RI 4712, 1950, 8 PP.

  • Deposit

    386. LONGWELL, C. R., E. H. PAMPEYAN, B. BOWYER, AND R. J.

  • Deposit

    ROBERTS. GEOLOGY AND MINERAL DEPOSITS OF CLARK COUNTY,

  • Deposit

    NEVADA. NV BUREAU OF MINES AND GEOL. BULL. 62, 1965, 218

  • Deposit

    PP.

  • Deposit

    547. PARDEE, J. T., AND E. L. JONES, JR. DEPOSITS OF

  • Deposit

    MANGANESE ORE IN NEVADA. U.S. GEOL. SURV.

  • Deposit

    BULL. 710-F, 1920, PP. 158-248.

  • Deposit

    721. TRENGOVE, R. R. RECONNAISSANCE OF NEVADA MANGANESE

  • Deposit

    DEPOSITS. BUMINES RI 5446, 1959, 40 PP.

  • Deposit

    733. U.S. SENATE. MINERAL AND WATER RESOURCES OF NEVADA.

  • Deposit

    88TH CONGR., 2D SESS,, SENATE DOCUMENT 87,

  • Deposit

    JULY 23, 1964, 314 PP. (ALSO PUBLISHED AS NV BUREAU OF MINES

  • Deposit

    AND GEOL. BULL. 65.)

  • Deposit

    844. WYMAN, W. F., AND S. F. RAVITZ. SULFUR DIOXIDE

  • Deposit

    LEACHING TESTS ON VARIOUS WESTERN MANGANESE ORES. BUMINES

  • Deposit

    RI 4077, 1947, 12 PP.

General comments

Subject category Comment text
Deposit OWNED BY THE CITY OF BOULDER CITY NEVADA IN 1975. WHITEHEAD OWNED CLAIMS CONTAINING THE DEPOSIT IN 19?? UNIDENTIFIED MANGANESE MINERALS IN WAD ORE. MANGANESE IS DISPERSED IN POCKETS AND LENSES THROU. GRADE QUANTITY MATRIX WATER CONTENT NOT AVAILABLE. MATRIX 50 PERCENT PROBABILITY BY EVALUATOR 1977. GENERAL LOCATION IS APPROX. 39 KM SE OF LAS VEGAS. PREVIOUS EVALUATOR WAS MCMAHAN. NO MILL ON SITE. GENERAL SIZE OF ORE BODY IS MEDIUM.

Reporter information

Type Date Name Affiliation Comment
Reporter 20-JUL-88 Koehler 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 Nevada resources

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