Data / Mines / Texas / Mobile Crusher #3 Frontera Materials

Mobile Crusher #3 Frontera Materials: 52 MSHA citations

Name: MSHA record of Mobile Crusher #3 Frontera Materials
Creator: SpecStream
License: https://creativecommons.org/licenses/by/4.0/

Updated November 6, 2026. Source: US Department of Labor, Mine Safety and Health Administration (MSHA), Open Government Data Sets.

Mobile Crusher #3 Frontera Materials is an active crushed, broken stone surface mine in Hidalgo County, Texas, operated by Frontera Materials Inc with 11 employees on MSHA's record (mine ID 4104292). Since January 1, 2022 MSHA inspectors issued 52 citations and orders there with $28,664 in proposed penalties, and 2 accident reports were filed there, with 2 injury or illness cases, 1 of them fatal.

The request: Watch Mobile Crusher #3 Frontera Materials (MSHA mine ID 4104292) in Hidalgo County, Texas: each new citation and each accident report. $10 of work on sign-up, no card.

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MSHA mine ID: 4104292
Status: Active since June 20, 2001
Main commodity: Crushed, broken stone
Mine type: Surface
County: Hidalgo County, Texas
Nearest town: La Joya
Operator: Frontera Materials Inc
Employees: 11
MSHA field office: San Antonio TX Field Office
Citations and orders since January 1, 2022: 52
Significant and substantial: 9 (17.3%)
Closure orders: 3
High negligence or reckless: 5
Proposed penalties: $28,664
Amount paid so far: $28,664
Inspections: 19
Inspector hours on site: 247
Citations per inspection: 2.74 (all mines 2.30)
Accident reports: 2
Injury and illness cases: 2
Fatalities: 1
Latest MSHA record: May 22, 2026
Citations issued to contractors here: 1 ($1,968 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	17	3	$3,553	0
2023	19	5	$12,744	0
2024	6	1	$9,742	2
2025	9	0	$1,588	0
2026	1	0	$1,037	0

Standards cited most at Mobile Crusher #3 Frontera Materials

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 56.12004	Surface metal and nonmetal mines	5
30 CFR 56.14100	Surface metal and nonmetal mines	5
30 CFR 56.12032	Surface metal and nonmetal mines	5
30 CFR 56.20003	Surface metal and nonmetal mines	4
30 CFR 56.18002	Surface metal and nonmetal mines	4
30 CFR 56.12008	Surface metal and nonmetal mines	3
30 CFR 56.14107	Surface metal and nonmetal mines	3
30 CFR 56.4102	Surface metal and nonmetal mines	2
30 CFR 56.4104	Surface metal and nonmetal mines	2
30 CFR 56.9300	Surface metal and nonmetal mines	1
30 CFR 56.11012	Surface metal and nonmetal mines	1
30 CFR 56.4230	Surface metal and nonmetal mines	1
30 CFR 56.14110	Surface metal and nonmetal mines	1
30 CFR 46.9	Training at sand, gravel and surface stone mines	1
30 CFR 47.51	Hazard communication	1

Injury and illness cases at Mobile Crusher #3 Frontera Materials

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 Mobile Crusher #3 Frontera Materials 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 Mobile Crusher #3 Frontera Materials

Equipment	Reports
Ore haulage trucks - on highway trucks	1
Machine	1

Other open mines in Hidalgo County, Texas

Mine	Operator	County	Main commodity	Employees	Citations since 2022
Texan Pit	Filegonia Aggregates LLC	Hidalgo County, TX	Sand, common	6	64
The Bandit Pit	Hard Rock Pit	Hidalgo County, TX	Sand, common	6	51
Mile 4 Pit	Filegonia Aggregates LLC	Hidalgo County, TX	Construction sand and gravel	6	49
Tabasco Pit	Capa	Hidalgo County, TX	Construction sand and gravel	27	39
Mobile Crusher #1	Frontera Materials Inc	Hidalgo County, TX	Crushed, broken limestone	10	39
La Havana Pit	Terra Firma Materials LLC	Hidalgo County, TX	Crushed, broken limestone	3	33
Perales Pit	Perales Pit LLC	Hidalgo County, TX	Sand, common	7	25
El Pinto Pit	Capa	Hidalgo County, TX	Sand, common	10	20
Alvarez Pit	Rio Grande Aggregates LLC	Hidalgo County, TX	Construction sand and gravel	4	8
Iron Rock Starr 1	Iron Rock Aggregates JV	Hidalgo County, TX	Construction sand and gravel	4	7
Portable Crusher #2	Martin Marietta Materials Southwest, LLC	Hidalgo County, TX	Crushed, broken limestone	8	6
San Manuel Pit	Terra Firma Materials LLC	Hidalgo County, TX	Construction sand and gravel	7	6
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
Portable Crusher HTX	Martin Marietta Materials Southwest, LLC	Hidalgo County, TX	Not stated	0	0

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.