Data / Mines / Puerto Rico / Cantera San Antonio
Cantera San Antonio: 40 MSHA citations
Updated November 6, 2026. Source: US Department of Labor, Mine Safety and Health Administration (MSHA), Open Government Data Sets.
Cantera San Antonio is an active crushed, broken limestone surface mine in Bayamon County, Puerto Rico, operated by Empresas Ortiz Brunet Inc with 37 employees on MSHA's record (mine ID 5400135). Since January 1, 2022 MSHA inspectors issued 40 citations and orders there with $25,408 in proposed penalties, and 18 accident reports were filed there, with 18 injury or illness cases.
The request: Watch Cantera San Antonio (MSHA mine ID 5400135) in Bayamon County, Puerto Rico: each new citation and each accident report. $10 of work on sign-up, no card.
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- MSHA mine ID
- 5400135
- Status
- Active since November 21, 1974
- Main commodity
- Crushed, broken limestone
- Mine type
- Surface
- County
- Bayamon County, Puerto Rico
- Nearest town
- Guaynabo
- Operator
- Empresas Ortiz Brunet Inc
- Employees
- 37
- MSHA field office
- San Juan PR Field Office
- Citations and orders since January 1, 2022
- 40
- Significant and substantial
- 16 (40.0%)
- Closure orders
- 3
- High negligence or reckless
- 2
- Proposed penalties
- $25,408
- Amount paid so far
- $20,165
- Inspections
- 40
- Inspector hours on site
- 298
- Citations per inspection
- 1.00 (all mines 2.30)
- Accident reports
- 18
- Injury and illness cases
- 18
- Fatalities
- 0
- Latest MSHA record
- September 30, 2026
- Citations issued to contractors here
- 3 ($668 proposed)
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 |
|---|---|---|---|---|
| 2022 | 6 | 2 | $2,954 | 3 |
| 2023 | 9 | 3 | $2,031 | 2 |
| 2024 | 6 | 3 | $4,963 | 2 |
| 2025 | 14 | 6 | $13,898 | 5 |
| 2026 | 5 | 2 | $1,562 | 6 |
Standards cited most at Cantera San Antonio
Sections of Title 30 of the Code of Federal Regulations named on the citations, with the part each belongs to.
| Standard | What the part covers | Citations |
|---|---|---|
| 30 CFR 56.14100 | Surface metal and nonmetal mines | 11 |
| 30 CFR 56.14105 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.14207 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.15007 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.11002 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.12004 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.14107 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.12012 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.14211 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.12030 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.14132 | Surface metal and nonmetal mines | 1 |
| 30 CFR 46.12 | Training at sand, gravel and surface stone mines | 1 |
| 30 CFR 46.6 | Training at sand, gravel and surface stone mines | 1 |
| 30 CFR 56.14130 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.14112 | Surface metal and nonmetal mines | 1 |
Injury and illness cases at Cantera San Antonio
Accident reports by degree of injury, as the operator reported them to MSHA.
| Degree | Cases |
|---|---|
| Days away from work or restricted activity | 17 |
| No lost time, or an occupational illness | 1 |
What the accident reports at Cantera San Antonio describe
Accident classification, as MSHA codes the circumstances that contributed most directly.
| Classification | Reports |
|---|---|
| Machinery | 4 |
| Handling of materials | 4 |
| Handtools (nonpowered) | 3 |
| Powered haulage | 2 |
| Slip or fall of person | 2 |
| Exploding vessels under pressure | 1 |
| Striking or bumping | 1 |
| Stepping or kneeling on object | 1 |
Equipment named in accident reports at Cantera San Antonio
| Equipment | Reports |
|---|---|
| Hand tools (not powered) | 3 |
| Hand tools (powered) | 2 |
| Front-end loader | 2 |
| Carriage-mounted drills | 2 |
| Crusher | 1 |
| Forklift | 1 |
| Conveyor | 1 |
| Tractor | 1 |
| Welding machine | 1 |
| Trucks | 1 |
Other open mines in Bayamon County, Puerto Rico
| Mine | Operator | County | Main commodity | Employees | Citations since 2022 |
|---|---|---|---|---|---|
| Montecielo Quarry LLC | Blue Rock Inc | Bayamon County, PR | Crushed, broken stone | 9 | 71 |
| Quikrete | Master Products Corp | Bayamon County, PR | Crushed, broken sandstone | 30 | 52 |
| Cantera Carraizo | Cantera Carraizo Inc | Bayamon County, PR | Crushed, broken limestone | 40 | 37 |
| Puerto Rico Asphalt-Bayamon | Puerto Rico Asphalt LLC | Bayamon County, PR | Crushed, broken stone | 8 | 30 |
| Arenero Estrella Inc | Arenero Estrella Inc | Bayamon County, PR | Crushed, broken basalt | 5 | 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.