Mines in Guam: 5 open mines and MSHA citations
Updated November 6, 2026. Source: US Department of Labor, Mine Safety and Health Administration (MSHA), Open Government Data Sets.
MSHA lists 5 open mines in Guam, run by 4 operators and employing 191 people. Since January 1, 2022 its inspectors issued 0 citations and orders there with $0 in proposed penalties, and operators reported 1 injury or illness case. The operators with the most open mines are Fargo Pacific Inc.; Hawaiian Rock Products; Primet Rock LLC. Data from MSHA, November 6, 2026.
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- 5Open mines
- 4Operators
- 191Employees
- 3Active
- 2New Mine
- 1Mines run by individuals, counted and not listed
- 0Citations and orders since January 1, 2022
- 0Inspections
- 1Accident reports
- 1Injury and illness cases
- 0Fatalities
- May 13, 2026Latest MSHA record
Operators with the most open mines in Guam
Ranked by open mines, then by citations. Sole proprietors and individuals are not listed.
| Operator | Open mines | Employees | Citations since 2022 | Proposed penalties | Injury cases |
|---|---|---|---|---|---|
| Fargo Pacific Inc. | 1 | 2 | 0 | $0 | 0 |
| Hawaiian Rock Products | 1 | 70 | 0 | $0 | 0 |
| Primet Rock LLC | 1 | 5 | 0 | $0 | 0 |
| Smithbridge Guam Inc. | 1 | 114 | 0 | $0 | 1 |
Mines with the most citations
Open mines, ranked by citations and orders since January 1, 2022.
| Mine | Operator | County | Main commodity | Employees | Citations since 2022 |
|---|---|---|---|---|---|
| Smithbridge Guam Inc. | Smithbridge Guam Inc. | Guam County, GU | Construction sand and gravel | 114 | 0 |
| Fidian Quarry | Hawaiian Rock Products | Guam County, GU | Crushed, broken stone | 70 | 0 |
| Primet Rock Mine | Primet Rock LLC | Guam County, GU | Crushed, broken limestone | 5 | 0 |
| Fargo Pacific Inc. | Fargo Pacific Inc. | Guam County, GU | Construction sand and gravel | 2 | 0 |
Counties
| County | Open mines |
|---|---|
| Guam County | 5 |
Mines by kind
| Kind | Open mines |
|---|---|
| Stone | 2 |
| Sand and gravel | 2 |
Main commodities
| Main commodity | Open mines | Share |
|---|---|---|
| Construction sand and gravel | 2 | 40% |
| Crushed, broken stone | 1 | 20% |
| Crushed, broken limestone | 1 | 20% |
Citations and injury cases by year
Calendar years since 2022; 2026 runs to the date of the MSHA files.
| Year | Citations and orders | Significant and substantial | Proposed penalties | Injury and illness cases |
|---|---|---|---|---|
| 2026 | 0 | 0 | $0 | 1 |
Injury and illness cases at mines in Guam
Accident reports by degree of injury, as the operator reported them to MSHA.
| Degree | Cases |
|---|---|
| Days away from work or restricted activity | 1 |
What the accident reports at mines in Guam describe
Accident classification, as MSHA codes the circumstances that contributed most directly.
| Classification | Reports |
|---|---|
| Powered haulage | 1 |
Equipment named in accident reports at mines in Guam
| Equipment | Reports |
|---|---|
| Conveyor | 1 |
US government work, public domain. Counts come from the MSHA files published on November 6, 2026. An open mine is one MSHA lists as Active, Intermittent, New Mine, Temporarily Idled or NonProducing; 13,673 were open that day. Citations, penalties, inspections and accident reports run from January 1, 2022. A citation is an inspector's allegation and an operator can contest it; the penalty is the amount MSHA first proposed, before any contest or settlement. An operator is the legal entity MSHA assesses, and a parent company is its controller. Mines run by sole proprietors or by individuals are counted in every total and are not named. This page uses MSHA data and is not endorsed or certified by MSHA. Free to reuse with credit to SpecStream under CC BY 4.0. Spot a wrong value? Write to [email protected] with the link to this page.