Data / Mines / Missouri / South Portable Plant
South Portable Plant: 2 MSHA citations
Updated November 6, 2026. Source: US Department of Labor, Mine Safety and Health Administration (MSHA), Open Government Data Sets.
South Portable Plant is an intermittent crushed, broken limestone surface mine in Jefferson County, Missouri, operated by Martin Marietta Materials, Inc. with 5 employees on MSHA's record (mine ID 2302567). Since January 1, 2022 MSHA inspectors issued 2 citations and orders there with $294 in proposed penalties, and 0 accident reports were filed there, with no injury or illness cases.
The request: Watch South Portable Plant (MSHA mine ID 2302567) in Jefferson County, Missouri: each new citation and each accident report. $10 of work on sign-up, no card.
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- MSHA mine ID
- 2302567
- Status
- Intermittent since March 4, 2026
- Main commodity
- Crushed, broken limestone
- Mine type
- Surface
- County
- Jefferson County, Missouri
- Nearest town
- Arnold
- Operator
- Martin Marietta Materials, Inc.
- Parent company
- Martin Marietta Materials Inc
- Employees
- 5
- MSHA field office
- Litchfield IL Field Office
- Citations and orders since January 1, 2022
- 2
- Significant and substantial
- 0 (0.0%)
- Closure orders
- 0
- High negligence or reckless
- 0
- Proposed penalties
- $294
- Amount paid so far
- $294
- Inspections
- 3
- Inspector hours on site
- 16
- Citations per inspection
- 0.67 (all mines 2.30)
- Accident reports
- 0
- Injury and illness cases
- 0
- Fatalities
- 0
- Latest MSHA record
- March 4, 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 | 2 | 0 | $294 | 0 |
Standards cited most at South Portable Plant
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 41.12 | Notice of legal identity | 1 |
| 30 CFR 46.9 | Training at sand, gravel and surface stone mines | 1 |
Other open mines in Jefferson County, Missouri
| Mine | Operator | County | Main commodity | Employees | Citations since 2022 |
|---|---|---|---|---|---|
| Selma Plant Quarry & Mill | River Cement Company DBA Buzzi Unicem USA | Jefferson County, MO | Cement | 150 | 324 |
| Barnhart Quarry | Martin Marietta Materials, Inc. | Jefferson County, MO | Crushed, broken limestone | 32 | 43 |
| Antire Quarry (CS-72) | Central Stone Company | Jefferson County, MO | Crushed, broken limestone | 25 | 27 |
| BMC Sand Eureka Plant | BMC Sand LLC | Jefferson County, MO | Construction sand and gravel | 4 | 19 |
| Cedar Springs Quarry | Arch Johnston Paving & Quarry Company Inc | Jefferson County, MO | Crushed, broken limestone | 17 | 18 |
| Pevely Plant | Covia Solutions LLC | Jefferson County, MO | Sand, industrial | 10 | 16 |
| Antonia (CS56) | Central Stone Company | Jefferson County, MO | Crushed, broken limestone | 10 | 10 |
| Trautman Quarry (CS-74) | Central Stone Company | Jefferson County, MO | Crushed, broken limestone | 8 | 10 |
| House Springs Quarry (CS-73) | Central Stone Company | Jefferson County, MO | Crushed, broken limestone | 5 | 10 |
| Festus Underground | Fred Weber, Inc. | Jefferson County, MO | Sand, industrial | 1 | 7 |
| Fast Pack 2 Portable 2 | Martin Marietta Materials, Inc. | Jefferson County, MO | Crushed, broken limestone | 15 | 6 |
| Plant 5 / Smreker Supply | H Sand & Gravel | Jefferson County, MO | Sand, industrial | 4 | 4 |
| H Sand & Gravel | H Sand & Gravel | Jefferson County, MO | Construction sand and gravel | 9 | 3 |
| Morse Mill Quarry #60 | Central Stone Company | Jefferson County, MO | Crushed, broken limestone | 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.