Data / Mines / Missouri / St Louis County
Mines in St Louis County, Missouri: 13 open mines
MSHA lists 13 open mines in St Louis County, Missouri, run by 7 operators and employing 268 people. Since January 1, 2022 its inspectors issued 318 citations and orders there with $103,233 in proposed penalties, and operators reported 49 injury or illness cases. The operators with the most open mines are Gateway Dredging and Contracting; Winter Brothers Material Company; Central Stone Company. Data from MSHA, November 6, 2026.
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.
- Open mines
- 13
- Operators
- 7
- Employees
- 268
- Active
- 10
- Intermittent
- 3
- Mines run by individuals, counted and not listed
- 1
- Citations and orders since January 1, 2022
- 318
- Significant and substantial
- 42 (13.2%)
- Closure orders
- 3
- High negligence or reckless
- 14
- Proposed penalties
- $103,233
- Amount paid so far
- $92,670
- Inspections
- 183
- Inspector hours on site
- 1,756
- Citations per inspection
- 1.74 (all mines 2.30)
- Accident reports
- 51
- Injury and illness cases
- 49
- Fatalities
- 0
- Latest MSHA record
- September 24, 2026
Operators with the most open mines in St Louis County, Missouri
Ranked by open mines, then by citations. Sole proprietors and individuals are not listed.
| Operator | Open mines | Employees | Citations since 2022 | Proposed penalties | Injury cases |
|---|---|---|---|---|---|
| Gateway Dredging and Contracting | 4 | 16 | 16 | $2,502 | 0 |
| Winter Brothers Material Company | 3 | 33 | 35 | $10,059 | 7 |
| Central Stone Company | 2 | 79 | 63 | $10,086 | 20 |
| U.S. Silica Company, LLC | 1 | 41 | 109 | $55,130 | 5 |
| Martin Marietta Materials, Inc. | 1 | 50 | 21 | $2,894 | 9 |
| Amrize South Central Inc. | 1 | 7 | 15 | $4,240 | 0 |
Operators with the most citations in St Louis County, Missouri
Citations and orders issued since January 1, 2022 at their open mines here.
| Operator | Open mines | Employees | Citations since 2022 | Proposed penalties | Injury cases |
|---|---|---|---|---|---|
| U.S. Silica Company, LLC | 1 | 41 | 109 | $55,130 | 5 |
| Central Stone Company | 2 | 79 | 63 | $10,086 | 20 |
| Winter Brothers Material Company | 3 | 33 | 35 | $10,059 | 7 |
| Martin Marietta Materials, Inc. | 1 | 50 | 21 | $2,894 | 9 |
| Gateway Dredging and Contracting | 4 | 16 | 16 | $2,502 | 0 |
| Amrize South Central Inc. | 1 | 7 | 15 | $4,240 | 0 |
Mines with the most citations
Open mines, ranked by citations and orders since January 1, 2022.
| Mine | Operator | County | Main commodity | Employees | Citations since 2022 |
|---|---|---|---|---|---|
| Pacific Plant | U.S. Silica Company, LLC | St Louis County, MO | Quartz, ground | 41 | 109 |
| Fort Bellefontaine (CS31) | Central Stone Company | St Louis County, MO | Crushed, broken limestone | 35 | 34 |
| Hageman Plant | Winter Brothers Material Company | St Louis County, MO | Construction sand and gravel | 21 | 31 |
| Jefferson Barracks (CS-71) | Central Stone Company | St Louis County, MO | Crushed, broken limestone | 44 | 29 |
| Champ Quarry | Martin Marietta Materials, Inc. | St Louis County, MO | Crushed, broken limestone | 50 | 21 |
| Amrize Bridgeton Sand and Gravel | Amrize South Central Inc. | St Louis County, MO | Construction sand and gravel | 7 | 15 |
| Dredge St Charles | Gateway Dredging and Contracting | St Louis County, MO | Sand, common | 4 | 8 |
| Dredge Chesterfield | Gateway Dredging and Contracting | St Louis County, MO | Sand, common | 4 | 3 |
| Dredge Gateway | Gateway Dredging and Contracting | St Louis County, MO | Construction sand and gravel | 4 | 3 |
| Shead | Winter Brothers Material Company | St Louis County, MO | Construction sand and gravel | 9 | 2 |
| Dredge Crystal City | Gateway Dredging and Contracting | St Louis County, MO | Sand, common | 4 | 2 |
| Gravois Plant | Winter Brothers Material Company | St Louis County, MO | Sand, common | 3 | 2 |
Main commodities
| Main commodity | Open mines | Share |
|---|---|---|
| Construction sand and gravel | 4 | 30.8% |
| Sand, common | 4 | 30.8% |
| Crushed, broken limestone | 3 | 23.1% |
| Quartz, ground | 1 | 7.7% |
| Sand, industrial | 1 | 7.7% |
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 | 84 | 11 | $18,535 | 13 |
| 2023 | 114 | 18 | $49,970 | 5 |
| 2024 | 66 | 4 | $17,631 | 15 |
| 2025 | 39 | 4 | $10,719 | 9 |
| 2026 | 15 | 5 | $6,378 | 7 |
Standards cited most at mines in St Louis County, Missouri
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 | 29 |
| 30 CFR 56.14100 | Surface metal and nonmetal mines | 23 |
| 30 CFR 56.12028 | Surface metal and nonmetal mines | 19 |
| 30 CFR 56.20003 | Surface metal and nonmetal mines | 18 |
| 30 CFR 56.14107 | Surface metal and nonmetal mines | 14 |
| 30 CFR 56.12032 | Surface metal and nonmetal mines | 13 |
| 30 CFR 47.41 | Hazard communication | 12 |
| 30 CFR 56.14112 | Surface metal and nonmetal mines | 12 |
| 30 CFR 56.11001 | Surface metal and nonmetal mines | 11 |
| 30 CFR 56.12030 | Surface metal and nonmetal mines | 10 |
| 30 CFR 57.12028 | Underground metal and nonmetal mines | 8 |
| 30 CFR 56.14207 | Surface metal and nonmetal mines | 7 |
| 30 CFR 57.20003 | Underground metal and nonmetal mines | 7 |
| 30 CFR 56.4201 | Surface metal and nonmetal mines | 6 |
| 30 CFR 56.5001 | Surface metal and nonmetal mines | 5 |
Injury and illness cases at mines in St Louis County, Missouri
Accident reports by degree of injury, as the operator reported them to MSHA.
| Degree | Cases |
|---|---|
| Days away from work or restricted activity | 35 |
| No lost time, or an occupational illness | 14 |
What the accident reports at mines in St Louis County, Missouri describe
Accident classification, as MSHA codes the circumstances that contributed most directly.
| Classification | Reports |
|---|---|
| Slip or fall of person | 15 |
| Handling of materials | 15 |
| Machinery | 8 |
| Handtools (nonpowered) | 5 |
| Powered haulage | 3 |
| Other | 3 |
| Fall of roof or back | 1 |
| Disorders (physical agents) | 1 |
Equipment named in accident reports at mines in St Louis County, Missouri
| Equipment | Reports |
|---|---|
| Hand tools (not powered) | 5 |
| Hand tools (powered) | 3 |
| Welding machine | 3 |
| Shovel | 2 |
| Trucks | 2 |
| Conveyor | 2 |
| Man lift | 1 |
| Ore haulage trucks - off highway trucks | 1 |
| Front-end loader | 1 |
| Fan | 1 |
Updated November 6, 2026. Read from US Department of Labor, Mine Safety and Health Administration (MSHA), Open Government Data Sets. 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.