Data / Mines / Missouri / Irock #3
Irock #3, Lincoln County, Missouri: 6 MSHA citations
Updated November 6, 2026. Source: US Department of Labor, Mine Safety and Health Administration (MSHA), Open Government Data Sets.
Irock #3 is an intermittent crushed, broken limestone surface mine in Lincoln County, Missouri, operated by Magruder Limestone Co Inc with 4 employees on MSHA's record (mine ID 2302551). Since January 1, 2022 MSHA inspectors issued 6 citations and orders there with $894 in proposed penalties, and 1 accident report was filed there, with 1 injury or illness case.
The request: Watch Irock #3 (MSHA mine ID 2302551) in Lincoln County, Missouri: each new citation and each accident report. $10 of work on sign-up, no card.
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- MSHA mine ID
- 2302551
- Status
- Intermittent since January 29, 2021
- Main commodity
- Crushed, broken limestone
- Mine type
- Surface
- County
- Lincoln County, Missouri
- Nearest town
- Lake Ozark
- Operator
- Magruder Limestone Co Inc
- Employees
- 4
- MSHA field office
- Rolla MO Field Office
- Citations and orders since January 1, 2022
- 6
- Significant and substantial
- 0 (0.0%)
- Closure orders
- 0
- High negligence or reckless
- 0
- Proposed penalties
- $894
- Amount paid so far
- $894
- Inspections
- 6
- Inspector hours on site
- 27
- Citations per inspection
- 1.00 (all mines 2.30)
- Accident reports
- 1
- Injury and illness cases
- 1
- Fatalities
- 0
- Latest MSHA record
- March 27, 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 |
|---|---|---|---|---|
| 2023 | 1 | 0 | $143 | 0 |
| 2024 | 2 | 0 | $298 | 0 |
| 2026 | 3 | 0 | $453 | 1 |
Standards cited most at Irock #3
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 | 3 |
| 30 CFR 56.4203 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.4201 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.14132 | Surface metal and nonmetal mines | 1 |
Injury and illness cases at Irock #3
Accident reports by degree of injury, as the operator reported them to MSHA.
| Degree | Cases |
|---|---|
| Days away from work or restricted activity | 1 |
What the accident reports at Irock #3 describe
Accident classification, as MSHA codes the circumstances that contributed most directly.
| Classification | Reports |
|---|---|
| Slip or fall of person | 1 |
Equipment named in accident reports at Irock #3
| Equipment | Reports |
|---|---|
| Front-end loader | 1 |
Other open mines in Lincoln County, Missouri
| Mine | Operator | County | Main commodity | Employees | Citations since 2022 |
|---|---|---|---|---|---|
| Magruder Limestone-Troy Quarry | Magruder Limestone Co Inc | Lincoln County, MO | Crushed, broken limestone | 15 | 50 |
| Troy West Quarry | Martin Marietta Materials, Inc. | Lincoln County, MO | Crushed, broken limestone | 5 | 41 |
| Tory East Quarry | Martin Marietta Materials, Inc. | Lincoln County, MO | Crushed, broken limestone | 8 | 38 |
| Old Monroe Materials, LLC | Old Monroe Materials, LLC | Lincoln County, MO | Construction sand and gravel | 3 | 29 |
| BMC Sand, Old Monroe | BMC Sand LLC | Lincoln County, MO | Sand, industrial | 4 | 24 |
| Foley Quarry | Magruder Limestone Co Inc | Lincoln County, MO | Crushed, broken limestone | 4 | 22 |
| Kimaterials Incorporated | Kimaterials | Lincoln County, MO | Construction sand and gravel | 7 | 17 |
| Irock Port #2 | Magruder Limestone Co Inc | Lincoln County, MO | Crushed, broken limestone | 8 | 16 |
| Moscow Mills Plant CS57 | Central Stone Company | Lincoln County, MO | Crushed, broken limestone | 5 | 9 |
| Irock #4 | Magruder Limestone Co Inc | Lincoln County, MO | Crushed, broken limestone | 1 | 4 |
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.