Data / Mines / Puerto Rico / Cantera Adjuntas
Cantera Adjuntas: 16 MSHA citations
Updated November 6, 2026. Source: US Department of Labor, Mine Safety and Health Administration (MSHA), Open Government Data Sets.
Cantera Adjuntas is an active crushed, broken stone surface mine in Ponce County, Puerto Rico, operated by Cantera Adjuntas, Inc. with 4 employees on MSHA's record (mine ID 5400292). Since January 1, 2022 MSHA inspectors issued 16 citations and orders there with $2,995 in proposed penalties, and 0 accident reports were filed there, with no injury or illness cases.
The request: Watch Cantera Adjuntas (MSHA mine ID 5400292) in Ponce 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
- 5400292
- Status
- Active since September 10, 2024
- Main commodity
- Crushed, broken stone
- Mine type
- Surface
- County
- Ponce County, Puerto Rico
- Nearest town
- Adjuntas
- Operator
- Cantera Adjuntas , Inc.
- Employees
- 4
- MSHA field office
- San Juan PR Field Office
- Citations and orders since January 1, 2022
- 16
- Significant and substantial
- 4 (25.0%)
- Closure orders
- 0
- High negligence or reckless
- 0
- Proposed penalties
- $2,995
- Amount paid so far
- $2,995
- Inspections
- 10
- Inspector hours on site
- 78
- Citations per inspection
- 1.60 (all mines 2.30)
- Accident reports
- 0
- Injury and illness cases
- 0
- Fatalities
- 0
- Latest MSHA record
- September 18, 2026
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 |
|---|---|---|---|---|
| 2024 | 6 | 1 | $1,092 | 0 |
| 2025 | 9 | 3 | $1,752 | 0 |
| 2026 | 1 | 0 | $151 | 0 |
Standards cited most at Cantera Adjuntas
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 56.14107 | Surface metal and nonmetal mines | 3 |
| 30 CFR 56.18002 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.14130 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.14100 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.23003 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.9201 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.14132 | Surface metal and nonmetal mines | 1 |
| 30 CFR 50.30 | Reporting of accidents, injuries and illnesses | 1 |
| 30 CFR 56.14108 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.12008 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.12013 | Surface metal and nonmetal mines | 1 |
Other open mines in Ponce County, Puerto Rico
| Mine | Operator | County | Main commodity | Employees | Citations since 2022 |
|---|---|---|---|---|---|
| Ponce Cement Plant | Cemex De Puerto Rico | Ponce County, PR | Cement | 109 | 49 |
| Cantera Puerto Ven | Cantera Puerto Ven, Inc | Ponce County, PR | Crushed, broken stone | 2 | 29 |
| Cantera Robles | Cantera Robles, Inc. | Ponce County, PR | Crushed, broken limestone | 5 | 18 |
| Gravero Coto Laurel | Robles Aggregates Inc | Ponce County, PR | Construction sand and gravel | 7 | 9 |
| Logistic Aggregates LLC. | Logistic Aggregates LLC. | Ponce County, PR | Sand, common | 7 | 2 |
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.