Data / Mines / Frontera Materials Inc
Frontera Materials Inc: 4 open mines, 95 MSHA citations
Updated November 6, 2026. Source: US Department of Labor, Mine Safety and Health Administration (MSHA), Open Government Data Sets.
Frontera Materials Inc (MSHA operator ID L13647) operates 4 open mines with 31 employees in Texas, mostly crushed, broken limestone. Since January 1, 2022 MSHA inspectors issued it 95 citations and orders with $39,018 in proposed penalties, and it reported 2 injury or illness cases, 1 of them fatal. Data from MSHA, November 6, 2026.
The request: Watch Frontera Materials Inc (MSHA operator ID L13647): each new citation, each accident report and each new mine. $10 of work on sign-up, no card.
SpecStream is the live web data engine for teams and agents. It reads the mine, citation, inspection and accident files that MSHA publishes, and this page is that reading. Ask for the mines of a commodity, state or operator with the operator's headquarters, website and size added from the web, and new mines, new citations and new accident reports arrive in your sheet, CRM, Slack or agent as MSHA posts them.
- MSHA operator ID
- L13647
- Open mines
- 4
- Employees at open mines
- 31
- States
- Texas
- Citations and orders since January 1, 2022
- 95
- Significant and substantial
- 17 (17.9%)
- Closure orders
- 3
- High negligence or reckless
- 6
- Proposed penalties
- $39,018
- Amount paid so far
- $38,867
- Inspections
- 41
- Inspector hours on site
- 346
- Citations per inspection
- 2.32 (all mines 2.30)
- Accident reports
- 2
- Injury and illness cases
- 2
- Fatalities
- 1
- Latest MSHA record
- October 30, 2026
Open mines of Frontera Materials Inc
Ranked by citations since January 1, 2022.
| Mine | Operator | County | Main commodity | Employees | Citations since 2022 |
|---|---|---|---|---|---|
| Mobile Crusher #3 Frontera Materials | Frontera Materials Inc | Hidalgo County, TX | Crushed, broken stone | 11 | 52 |
| Mobile Crusher #1 | Frontera Materials Inc | Hidalgo County, TX | Crushed, broken limestone | 10 | 39 |
| Carrales Plant | Frontera Materials Inc | Hidalgo County, TX | Sand, common | 5 | 4 |
| Cozad Pit | Frontera Materials Inc | Hidalgo County, TX | Construction sand and gravel | 5 | 0 |
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 | 27 | 7 | $4,948 | 0 |
| 2023 | 28 | 7 | $17,148 | 0 |
| 2024 | 14 | 2 | $12,169 | 2 |
| 2025 | 21 | 1 | $3,414 | 0 |
| 2026 | 5 | 0 | $1,339 | 0 |
Standards cited most at Frontera Materials Inc
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 | 10 |
| 30 CFR 56.12032 | Surface metal and nonmetal mines | 7 |
| 30 CFR 56.12004 | Surface metal and nonmetal mines | 6 |
| 30 CFR 56.18002 | Surface metal and nonmetal mines | 5 |
| 30 CFR 56.20003 | Surface metal and nonmetal mines | 5 |
| 30 CFR 56.14101 | Surface metal and nonmetal mines | 4 |
| 30 CFR 56.14107 | Surface metal and nonmetal mines | 4 |
| 30 CFR 56.12008 | Surface metal and nonmetal mines | 4 |
| 30 CFR 56.9300 | Surface metal and nonmetal mines | 3 |
| 30 CFR 56.14112 | Surface metal and nonmetal mines | 3 |
| 30 CFR 56.14132 | Surface metal and nonmetal mines | 3 |
| 30 CFR 47.44 | Hazard communication | 2 |
| 30 CFR 50.30 | Reporting of accidents, injuries and illnesses | 2 |
| 30 CFR 56.12013 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.12018 | Surface metal and nonmetal mines | 2 |
Injury and illness cases at Frontera Materials Inc
Accident reports by degree of injury, as the operator reported them to MSHA.
| Degree | Cases |
|---|---|
| Fatality | 1 |
| Permanent disability | 1 |
What the accident reports at Frontera Materials Inc describe
Accident classification, as MSHA codes the circumstances that contributed most directly.
| Classification | Reports |
|---|---|
| Powered haulage | 1 |
| Machinery | 1 |
Equipment named in accident reports at Frontera Materials Inc
| Equipment | Reports |
|---|---|
| Ore haulage trucks - on highway trucks | 1 |
| Machine | 1 |
Commodities
| Main commodity | Open mines |
|---|---|
| Crushed, broken limestone | 1 |
| Crushed, broken stone | 1 |
| Sand, common | 1 |
| Construction sand and gravel | 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.