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States › Guam
MSHA mine register by county

Mines in Guam County, Guam

Guam County, Guam has 22 mines on MSHA's register: 3 active, 17 abandoned. 3 accidents have been reported at these mines between 2019 and 2026.

Every mine MSHA has registered in Guam County, working or not, with the accident, fatality and citation record each one carries on this site. Active mines are listed first, then the rest by the weight of their record.

Abandoned and historical mine features in Guam County →

Mines on register
22
Active
3
Fatalities on record
0
Citations issued
0
0 underground · 20 surface · 1 facilities 0 coal · 22 metal and non-metal 17 abandoned 3 reported accidents, 2019–2026

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On the map 
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MSHA-registered mine, any status

Mines plot only where MSHA holds a surveyed coordinate for the site; mines the agency locates to a town, county or state centroid are in the counts and the list above but not drawn. Click a point for the mine's status and record.

Operators with the most mines herecurrent operator of record
Operator Mines Active Fatalities
Hawaiian Rock Products 4 1 0
Fargo Pacific Inc. 2 0 0
Smithbridge Guam Inc. 2 1 0
554 RED HORSE Squadron 1 0 0
JMC Equipment Rental 1 0 0
Mariana Stones Corporation 1 0 0
Primet Rock LLC 1 1 0
TEREAS INC 1 0 0
Mines in Guam County22 on register
  1. Smithbridge Guam Inc.
    Surface metal/non-metal · Smithbridge Guam Inc. · MSHA ID 6600018
    Active
  2. Fidian Quarry
    Facility metal/non-metal · Hawaiian Rock Products · MSHA ID 6600006
    Active
  3. Primet Rock Mine
    Surface metal/non-metal · Primet Rock LLC · MSHA ID 6600015
    Active
  4. 554 RHS Quarry
    Surface metal/non-metal · 554 RED HORSE Squadron · MSHA ID 6600012
    Abandoned
  5. 7024-R5
    Surface metal/non-metal · Smithbridge Guam Inc. · MSHA ID 6600028
    Abandoned
  6. Agg & Top Soil #1
    Surface metal/non-metal · Tereas Inc · MSHA ID 6600016
    Abandoned
  7. Agg & Top Soil #1
    Surface metal/non-metal · Tereas Inc · MSHA ID 6600027
    Abandoned
  8. Coral Pit
    Surface metal/non-metal · Department Of Public Works · MSHA ID 6600025
    Abandoned
  9. Fargo Pacific Inc.
    Surface metal/non-metal · Fargo Pacific Inc. · MSHA ID 6600019
    New Mine
  10. FARGO PACIFIC INC.
    Surface metal/non-metal · Fargo Pacific Inc. · MSHA ID 6600020
    Abandoned
  11. JMC Quarry
    Surface metal/non-metal · JMC Equipment Rental · MSHA ID 6600024
    Abandoned
  12. Main Pit
    Surface metal/non-metal · UMS Construction · MSHA ID 6600026
    Abandoned
  13. Mariana Stones Corporation
    Surface metal/non-metal · Mariana Stones Corporation · MSHA ID 6600017
    Abandoned
  14. Mine # 3
    Surface metal/non-metal · International Consolidated Contracting, LLC · MSHA ID 6600021
    Abandoned
  15. Mine # 4
    Surface metal/non-metal · International Consolidated Contracting, LLC · MSHA ID 6600022
    Abandoned
  16. Mount Santa Rosa Quarry
    Surface metal/non-metal · Hawaiian Rock Products · MSHA ID 6600010
    Abandoned
  17. Okkodo Plant 1
    metal/non-metal · Core Tech International · MSHA ID 6600029
    New Mine
  18. Perez Brothers Barrigada Crusher
    Surface metal/non-metal · Perez Brothers · MSHA ID 6600004
    Abandoned
  19. Portable Plant 1
    Surface metal/non-metal · Core Tech International · MSHA ID 6600023
    Abandoned
  20. R10 Quarry
    Surface metal/non-metal · Hawaiian Rock Products · MSHA ID 6600013
    Abandoned
  21. VARIOUS LOCATIONS
    Surface metal/non-metal · TEREAS INC · MSHA ID 6000016
    Abandoned
  22. Yigo, Raceway
    Surface metal/non-metal · Hawaiian Rock Products · MSHA ID 6600011
    Abandoned

Status, type and operator are as reported to MSHA. Fatality and accident counts are MSHA's reportable accident records for the mine; citations are inspector-issued violations on record. Each mine's own page carries the full detail.

How to read these numbers

The register is MSHA's Mine Data Retrieval System: every operation ever assigned a mine ID, including ones abandoned decades ago, so the count is a history of mining in the county, not a count of working mines. A mine's county is the one its operator reported to MSHA. Fatality and accident counts start with MSHA's reportable-accident records (1983 onward); citation counts are inspector-issued violations on record. We are an independent research tool, not MSHA.