Data / Mines / Martin Marietta Materials Southwest, LLC
Martin Marietta Materials Southwest, LLC: 290 MSHA citations
Updated November 6, 2026. Source: US Department of Labor, Mine Safety and Health Administration (MSHA), Open Government Data Sets.
Martin Marietta Materials Southwest, LLC (MSHA operator ID 0084984) operates 24 open mines with 584 employees in Texas, Louisiana, Oklahoma, mostly construction sand and gravel. Since January 1, 2022 MSHA inspectors issued it 290 citations and orders with $71,835 in proposed penalties, and it reported 23 injury or illness cases. Data from MSHA, November 6, 2026.
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- MSHA operator ID
- 0084984
- Open mines
- 24
- Employees at open mines
- 584
- States
- Texas, Louisiana, Oklahoma
- Parent company
- Martin Marietta Materials Inc
- Citations and orders since January 1, 2022
- 290
- Significant and substantial
- 26 (9.0%)
- Closure orders
- 3
- High negligence or reckless
- 5
- Proposed penalties
- $71,835
- Amount paid so far
- $59,287
- Inspections
- 233
- Inspector hours on site
- 2,944
- Citations per inspection
- 1.24 (all mines 2.30)
- Accident reports
- 24
- Injury and illness cases
- 23
- Fatalities
- 0
- Latest MSHA record
- October 27, 2026
Open mines of Martin Marietta Materials Southwest, LLC
Ranked by citations since January 1, 2022.
| Mine | Operator | County | Main commodity | Employees | Citations since 2022 |
|---|---|---|---|---|---|
| Martin Marietta Slaton Plant | Martin Marietta Materials Southwest, LLC | Crosby County, TX | Construction sand and gravel | 30 | 37 |
| Martin Marietta Merkel Plant | Martin Marietta Materials Southwest, LLC | Jones County, TX | Construction sand and gravel | 20 | 33 |
| Beckmann Quarry | Martin Marietta Materials Southwest, LLC | Bexar County, TX | Crushed, broken limestone | 48 | 31 |
| Mill Creek Limestone Quarry | Martin Marietta Materials Southwest, LLC | Johnston County, OK | Crushed, broken limestone | 60 | 30 |
| North Bridgeport Quarry | Martin Marietta Materials Southwest, LLC | Wise County, TX | Crushed, broken limestone | 60 | 26 |
| Garwood Plant | Martin Marietta Materials Southwest, LLC | Colorado County, TX | Construction sand and gravel | 24 | 19 |
| Webberville S&G | Martin Marietta Materials Southwest, LLC | Travis County, TX | Construction sand and gravel | 26 | 18 |
| Bridgeport Stone Plant | Martin Marietta Materials Southwest, LLC | Wise County, TX | Crushed, broken limestone | 94 | 17 |
| Medina Rock & Rail | Martin Marietta Materials Southwest, LLC | Medina County, TX | Crushed, broken limestone | 48 | 17 |
| Tin Top Sand and Gravel Plant | Martin Marietta Materials Southwest, LLC | Parker County, TX | Construction sand and gravel | 24 | 17 |
| Bells/Savoy Aggregate Operations | Martin Marietta Materials Southwest, LLC | Fannin County, TX | Construction sand and gravel | 23 | 17 |
| Rio Medina | Martin Marietta Materials Southwest, LLC | Medina County, TX | Crushed, broken limestone | 21 | 16 |
| Garfield Sand & Gravel | Martin Marietta Materials Southwest, LLC | Travis County, TX | Construction sand and gravel | 12 | 16 |
| North Austin Quarry | Martin Marietta Materials Southwest, LLC | Williamson County, TX | Construction sand and gravel | 4 | 14 |
| Bedrock Plant | Martin Marietta Materials Southwest, LLC | Kerr County, TX | Construction sand and gravel | 9 | 12 |
| Black Spur Quarry | Martin Marietta Materials Southwest, LLC | Uvalde County, TX | Crushed, broken limestone | 9 | 12 |
| Hunter Stone | Martin Marietta Materials Southwest, LLC | Comal County, TX | Crushed, broken stone | 25 | 8 |
| Poteet Sand Plant | Martin Marietta Materials Southwest, LLC | Atascosa County, TX | Construction sand and gravel | 11 | 8 |
| Smithson Valley Quarry | Martin Marietta Materials Southwest, LLC | Bexar County, TX | Construction sand and gravel | 3 | 7 |
| San Pedro Quarry | Martin Marietta Materials Southwest, LLC | Bexar County, TX | Crushed, broken limestone | 12 | 6 |
| Portable Crusher #2 | Martin Marietta Materials Southwest, LLC | Hidalgo County, TX | Crushed, broken limestone | 8 | 6 |
| 211 Quarry | Martin Marietta Materials Southwest, LLC | Bexar County, TX | Crushed, broken limestone | 8 | 4 |
| Perryville Aggregates Plant #2 | Martin Marietta Materials Southwest, LLC | Morehouse Parish, LA | Construction sand and gravel | 5 | 1 |
| Portable Crusher HTX | Martin Marietta Materials Southwest, LLC | Hidalgo County, TX | Not stated | 0 | 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 | 32 | 3 | $4,947 | 1 |
| 2023 | 51 | 7 | $24,967 | 8 |
| 2024 | 77 | 12 | $20,385 | 5 |
| 2025 | 92 | 2 | $16,662 | 5 |
| 2026 | 38 | 2 | $4,874 | 4 |
Standards cited most at Martin Marietta Materials Southwest, LLC
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 | 31 |
| 30 CFR 56.20003 | Surface metal and nonmetal mines | 26 |
| 30 CFR 56.12004 | Surface metal and nonmetal mines | 21 |
| 30 CFR 56.14112 | Surface metal and nonmetal mines | 16 |
| 30 CFR 56.14132 | Surface metal and nonmetal mines | 15 |
| 30 CFR 56.14107 | Surface metal and nonmetal mines | 13 |
| 30 CFR 56.12008 | Surface metal and nonmetal mines | 10 |
| 30 CFR 56.12032 | Surface metal and nonmetal mines | 9 |
| 30 CFR 56.12018 | Surface metal and nonmetal mines | 8 |
| 30 CFR 56.18002 | Surface metal and nonmetal mines | 8 |
| 30 CFR 56.12030 | Surface metal and nonmetal mines | 7 |
| 30 CFR 56.4201 | Surface metal and nonmetal mines | 7 |
| 30 CFR 56.14207 | Surface metal and nonmetal mines | 7 |
| 30 CFR 56.11001 | Surface metal and nonmetal mines | 6 |
| 30 CFR 47.41 | Hazard communication | 6 |
Injury and illness cases at Martin Marietta Materials Southwest, LLC
Accident reports by degree of injury, as the operator reported them to MSHA.
| Degree | Cases |
|---|---|
| Permanent disability | 1 |
| Days away from work or restricted activity | 12 |
| No lost time, or an occupational illness | 10 |
What the accident reports at Martin Marietta Materials Southwest, LLC describe
Accident classification, as MSHA codes the circumstances that contributed most directly.
| Classification | Reports |
|---|---|
| Machinery | 5 |
| Handling of materials | 5 |
| Handtools (nonpowered) | 4 |
| Slip or fall of person | 4 |
| Other | 2 |
| Disorders (physical agents) | 2 |
| Powered haulage | 1 |
| Exploding vessels under pressure | 1 |
Equipment named in accident reports at Martin Marietta Materials Southwest, LLC
| Equipment | Reports |
|---|---|
| Hand tools (not powered) | 4 |
| Front-end loader | 2 |
| Hand tools (powered) | 2 |
| Welding machine | 1 |
| Shovel | 1 |
| Crusher | 1 |
| Bulldozer | 1 |
Commodities
| Main commodity | Open mines |
|---|---|
| Construction sand and gravel | 12 |
| Crushed, broken limestone | 10 |
| Crushed, broken stone | 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.