MINE DETAILS
Iron Mountain Quarry
MSHA MINE ID2300210
LOCATION
Mine location
1 of 1 mine with usable MSHA coordinates. Select a marker to open a mine.
Mine coordinates
- Iron Mountain Quarry37.69528, -90.64028Open map ↗
Quarterly trends
2025 Q1 – 2026 Q4
Database snapshot · 2026-10-13. MSHA quarterly production and employment reports.
Coal production
0reported short tons
Hours worked
126,204reported employee hours
Tons per hour
0.00production ÷ hours worked
Missing values appear as —. Totals use available reports. Tons per hour requires production and hours for the same quarters and a nonzero hours total. * Striped bars mark partial mine coverage or an incomplete quarter. See the table for coverage.
Quarterly data and reporting coverage
| Quarter | Coal (short tons) | Hours worked | Tons / hour | Avg. employees | Coverage |
|---|---|---|---|---|---|
| 2025 Q1 | 0 | 19,568 | 0.00 | 32 | 1/1 mines reporting |
| 2025 Q2 | 0 | 24,221 | 0.00 | 38 | 1/1 mines reporting |
| 2025 Q3 | 0 | 22,359 | 0.00 | 34 | 1/1 mines reporting |
| 2025 Q4 | 0 | 18,841 | 0.00 | 33 | 1/1 mines reporting |
| 2026 Q1 | 0 | 20,063 | 0.00 | 32 | 1/1 mines reporting |
| 2026 Q2 | 0 | 21,152 | 0.00 | 33 | 1/1 mines reporting |
| 2026 Q3 | — | — | — | — | No report |
| 2026 Q4 | — | — | — | — | No report |
Safety and enforcement
2025-01-01 – 2026-10-13
Violations
130 significant & substantial (S&S)
Accident records
40 records classified as fatality
Proposed penalties · USD
2,038.0013 of 13 violations with amounts
On-site inspection hours
85.256 inspections · 6 with hours
Counts are published records, including contractor records. * The quarter was incomplete at the snapshot date; recent counts may rise as reports arrive. — means no reported amount or hours. Portfolio totals use current membership.
Quarterly safety data
| Quarter | Violations | S&S | Proposed USD | Accident records | Fatality records | Inspections | On-site hours |
|---|---|---|---|---|---|---|---|
| 2025-Q1 | 2 | 0 | 302.00 | 0 | 0 | 1 | 8.8 |
| 2025-Q2 | 5 | 0 | 755.00 | 2 | 0 | 1 | 29.5 |
| 2025-Q3 | 0 | 0 | — | 1 | 0 | 1 | 1.0 |
| 2025-Q4 | 0 | 0 | — | 0 | 0 | 0 | — |
| 2026-Q1 | 2 | 0 | 377.00 | 1 | 0 | 2 | 28.5 |
| 2026-Q2 | 4 | 0 | 604.00 | 0 | 0 | 1 | 17.5 |
| 2026-Q3 | 0 | 0 | — | 0 | 0 | 0 | — |
| 2026-Q4 * | 0 | 0 | — | 0 | 0 | 0 | — |
Most cited CFR sections
All violations issued in the selected period. Counts combine subsections.
Safety activity
Regular Safety and Health Inspection · 17.5 on-site hours
56.12030 · $151.00 proposed
56.12028 · $151.00 proposed
56.12030 · $151.00 proposed
56.14100(b) · $151.00 proposed
Spot Inspection · 11.0 on-site hours
HANDTOOLS (NONPOWERED) · DAYS RESTRICTED ACTIVITY ONLY
Accident narrative
The employee was performing maintenance using a wrench. Wrench slipped off a bolt, causing the employee to lose balance and fall backwards into a shelf then onto the ground. The employee tried to brace themselves with their left arm injuring it.
56.12006 · $151.00 proposed
56.14100(b) · $226.00 proposed
Regular Safety and Health Inspection · 17.5 on-site hours
Verbal Hazard Complaint Inspections · 1.0 on-site hours
HANDLING OF MATERIALS · NO DYS AWY FRM WRK,NO RSTR ACT
Accident narrative
The employee was picking up debris in the shop and got a metal splinter in EE's fingernail, which was removed by medical professional. (Note: The employee was provided with gloves but was not wearing them when the injury occurred.)
OTHER · DAYS RESTRICTED ACTIVITY ONLY
Accident narrative
The employee was in the shop welding on a secured 988 loader bucket. The employee was working laying down on their left side and started to roll onto their right side and felt pain in their back.
56.14109(a) · $151.00 proposed
56.12032 · $151.00 proposed
56.12004 · $151.00 proposed
56.14100(b) · $151.00 proposed
56.13001 · $151.00 proposed
Regular Safety and Health Inspection · 29.5 on-site hours
POWERED HAULAGE · NO DYS AWY FRM WRK,NO RSTR ACT
Accident narrative
The employee was operating a CAT 988K loader, with left-handed joystick, when the employee turned their hand outward, EE experienced pain. On 6.27.25 employee started physical therapy.
47.44(b) · $151.00 proposed
56.12004 · $151.00 proposed
Regular Safety and Health Inspection · 8.8 on-site hours
Safety sources and definitions
MSHA Violations (issue date), Accidents (accident date), and Inspections (begin date). Snapshot 2026-10-13.
Counts describe published rows, including contractor records; accident records are not distinct incidents or numbers of people injured.
Zero means no matching records in the imported sources, not proof of no events. Historical coverage differs by source; absence before a source begins reporting is not a zero incident rate. Invalid or absent dates and records after the snapshot are excluded.
S&S means SIG_SUB=Y. Fatality records use DEGREE_INJURY_CD=01. Proposed penalties are not final assessed or paid amounts; missing dollar values are omitted.
Inspection hours are SUM_TOTAL_ON_SITE_HOURS attributed to the inspection start date, without supervisor/trainee hours. Missing hours are omitted; a started inspection may still be open.
Portfolio totals use current mine membership, including events before the current owner or operator's tenure.
CFR headings link to the current Title 30 index; they are not historical legal determinations.
OWNERSHIP
Operator and controller history
Current ownership comes from MSHA Mines. Historical start and end dates come from MSHA Controller and Operator History.
—
Martin Marietta Materials InccontrolsMartin Marietta Materials, Inc.operatesIron Mountain Quarry
msha-controller-operator-history · controller/operator co-tenure derived on mine 2300210—
PEPI Capital, L.P. et alcontrolsNew Frontier Materials Operations Beta, LLCoperatesIron Mountain Quarry
msha-controller-operator-history · controller/operator co-tenure derived on mine 2300210—
RWNIH-OP Holdings LLC et alcontrolsNew Frontier Materials Operations Beta, LLCoperatesIron Mountain Quarry
msha-controller-operator-history · controller/operator co-tenure derived on mine 2300210—
42 North Resources Partners II LP et alcontrolsNew Frontier Materials Operations Beta, LLCoperatesIron Mountain Quarry
msha-controller-operator-history · controller/operator co-tenure derived on mine 2300210—
Fred Weber, Inc.controlsIron Mountain Trap Rock CompanyoperatesIron Mountain Quarry
msha-controller-operator-history · controller/operator co-tenure derived on mine 2300210—
John R MalloycontrolsIron Mountain Trap Rock CompanyoperatesIron Mountain Quarry
msha-controller-operator-history · controller/operator co-tenure derived on mine 2300210Other historical summaries · source-specific periods
RECORD SUMMARY
Production, safety and enforcement
These summaries use the periods stated on each card, independently of the reporting period above.
01 / SAFETYwatch
Accidents and injuries
40 historical accident/injury rows; 0 coded fatalities and 47 lost days across the published record.
ACCIDENT + INJURY RECORD9 since 2021
accidentsmine-production-quarterly02 / COMPLIANCEwatch
Violations and penalties
107 violation rows across the full record; 20 carry an S&S flag and $15,893 appears in current assessed amounts.
ENFORCEMENT ACTIVITY29 since 2021
inspectionsviolationsassessed-violationsorders-107a03 / HEALTHwatch
Occupational health samples
77 personal. 1 personal-sample rows have a published C/E ratio above 1; 0 noise rows have an action-level or PEL dose above 100%. These are separate measures, not a silica exceedance count. Silica results and sample status are shown separately.
OCCUPATIONAL EXPOSURE77 samples
personal-health-samples04 / PRODUCTIONcontext
Quarterly production and employment
21K employee hours and 33 summed average employees across reported subunits in the latest published quarter.
2026-Q20 tons
mine-production-quarterlymine-production-yearly05 / LEGALwatch
Contests, conferences and decisions
8 contested-violation rows, 8 civil-penalty docket/decision rows, and 3 conference records linked by issuance number.
POST-ISSUANCE LIFECYCLE19 linked rows
conferencescontested-violationscivil-penalty-dockets-decisions06 / CONTRACTORScontext
Contractors
Contractors are linked through this mine’s violation or accident records. Their production and hours cover all their operations, so they are not included in this mine’s totals.
ENTITY-LEVEL CONTEXT0 linked entities
contractor-production-quarterlycontractor-production-yearlyaccidentsviolations07 / INSPECTIONScontext
Inspections
76 inspection events and 1K published inspection hours across the historical record.
OVERSIGHT COVERAGE17 since 2021
inspectionsviolationsHEALTH SAMPLING
Silica and quartz
Coal quartz, metal/nonmetal personal samples and area samples. Snapshot Oct 13, 2026. 32 silica records across the mine’s published history.
Personal silica samples · concentration / limit
Quarterly mean · published C/E ratio
— No eligible measurements. * Quarter in progress. Means describe the available samples, not average exposure across the mine.
Quartz % is the sample’s quartz content; µg/m³ is its reported concentration. Personal C/E is the ratio to the limit published with that sample. Personal and area concentration units and void status are not specified in those source files.
| Date / sample | Dataset / analyte | Occupation / area | Measurement | Sample status | Published action |
|---|---|---|---|---|---|
| No silica records match these filters. Missing samples do not establish safe conditions. | |||||
Sources and interpretation
- Coal means use numeric concentrations from samples marked not voided, excluding control/invalid sample types and dates after the snapshot. Missing values remain null; reported zeroes remain zero.
- Quarterly means describe available samples, not mine-wide or worker-average exposure. Quarters with no eligible measurements remain empty; the current quarter is partial.
- Personal C/E is MSHA's published concentration-to-limit ratio. A value above 1 is not by itself a citation or a determination under the 2024 silica rule. Personal and area files do not publish a void-status field.
- Area records include bulk-dust analyses and are kept separate from personal exposure results. Their concentration units are not specified in the source dictionary.
- Missing samples do not establish safe conditions. Coal quartz percentage and concentration are separate measures. No compliance threshold is inferred for coal samples.
Coal quartz field definitions ↗Metal/nonmetal personal field definitions ↗Metal/nonmetal area field definitions ↗
EIA + TITLE 30
EIA production and cited regulations
EIA annual figures are reported separately from MSHA. Regulation links use the current eCFR snapshot.
Not present in the 2024 EIA coal workbook.
This can mean the operation is non-coal, inactive for the annual period, or outside the EIA-7A reporting population.
30 CFR 56.12030Correction of dangerous conditions.2 recent rows ↗30 CFR 56.12028Testing grounding systems.1 recent row ↗30 CFR 56.14100Safety defects; examination, correction and records.3 recent rows ↗30 CFR 56.12006Distribution boxes.1 recent row ↗30 CFR 56.14109Unguarded conveyors with adjacent travelways.1 recent row ↗30 CFR 56.12032Inspection and cover plates.1 recent row ↗30 CFR 56.12004Electrical conductors.1 recent row ↗30 CFR 56.13001General requirements for boilers and pressure vessels.1 recent row ↗
RECENT PUBLIC RECORDS
Recent violations and samples
Latest records retained for inspection; aggregates above use the full source history.
504091556.12030Citation
504091456.12028Citation
504091356.12030Citation
504091256.14100(b)Citation
504088856.12006Citation
504088756.14100(b)Citation
504028356.14109(a)Citation
504028256.12032Citation
Coal dust, noise and other contaminants. Silica records above ↑
Respirable dust, <.1mgFront-end Loader Operator
C/E: 00.00Concentration: 0000.00 · limit: 0000.00Source unit unspecified
Respirable dust, <.1mgFront-end Loader Operator
C/E: 00.00Concentration: 0000.00 · limit: 0000.00Source unit unspecified
Respirable dust, <.1mgCrusher Oper/Worker
C/E: 00.00Concentration: 0000.00 · limit: 0000.00Source unit unspecified
Respirable dust, <.1mgFront-end Loader Operator
C/E: 00.00Concentration: 0000.00 · limit: 0000.00Source unit unspecified
Respirable dust, <.1mgDrill Operator, Rotary
C/E: 00.00Concentration: 0000.00 · limit: 0000.00Source unit unspecified
Respirable dust, <.1mgTruck Driver
C/E: 00.00Concentration: 0000.00 · limit: 0000.00Source unit unspecified
Respirable dust, <.1mgFront-end Loader Operator
C/E: 00.00Concentration: 0000.00 · limit: 0000.00Source unit unspecified
Respirable dust, <.1mgTruck Driver
C/E: 00.00Concentration: 0000.00 · limit: 0000.00Source unit unspecified
SOURCE COVERAGE
Reporting dates and coverage
13 datasets contain linked records. Missing datasets are listed below.
DATASETROWSWINDOWSTATUS
Accident, Injuries, and Illnessessafety · contractors40Jun 28, 2000—Feb 24, 2026mine-keyed
Addresses of Recordidentity · logistics1Apr 9, 2010—Apr 9, 2010mine-keyed
Assessed Violationscompliance · legal107Jun 6, 2000—May 11, 2026mine-keyed
Civil Penalty Dockets and Decisionscompliance · legal8Jul 6, 2011—Oct 29, 2019mine-keyed
Coal Dust Sampleshealth · safety—No published rowsabsent / not applicable
Conferencescompliance · legal3May 16, 2013—May 16, 2013mine-keyed
Contested Violationscompliance · legal8Mar 9, 2010—Apr 9, 2019mine-keyed
Contractor Employment and Production — Quarterlycontractors · production · safety—No published rowsabsent / not applicable
Contractor Employment and Production — Yearlycontractors · production · safety—No published rowsabsent / not applicable
Controller and Operator Historyidentity · compliance6Jan 1, 1950—Jun 15, 2026mine-keyed
Mine Employment and Production — Quarterlyproduction · safety · compliance313Not published—Not publishedmine-keyed
Mine Employment and Production — Yearlyproduction · safety · compliance78Not published—Not publishedmine-keyed
Inspectionssafety · compliance76Jun 6, 2000—May 11, 2026mine-keyed
Minesidentity · production · logistics1Not published—Not publishedmine-keyed
Metal and Nonmetal Area Sampleshealth · safety—No published rowsabsent / not applicable
Metal and Nonmetal Personal Health Sampleshealth · safety77Jan 10, 2002—Mar 31, 2026mine-keyed
Noise Sampleshealth · safety · equipment—No published rowsabsent / not applicable
Quartz Samples — Coalhealth · safety—No published rowsabsent / not applicable
Violationscompliance · safety · legal107Jun 6, 2000—May 11, 2026mine-keyed
107(a) Orders Issuedsafety · compliance—No published rowsabsent / not applicable
NOTES
Limitations
- Contractor production is entity-level and is never represented as mine-attributable.
- Missing rows can mean no event, publication delay, identity mismatch, or inapplicability.