MSHA DATABASEMSHA records · 16 contributing sources · snapshot Oct 13, 2026

MINE DETAILS

Linwood Mine

ActiveUndergroundCrushed, Broken Limestone NEC
MSHA MINE ID1300097
LOCATIONScott, IA
PUBLIC RECORD6,356 linked rows

LOCATION

Mine location

1 of 1 mine with usable MSHA coordinates. Select a marker to open a mine.

Mine coordinates

2025-01-01 – 2026-10-13Applies to production, safety and portfolio metrics. Silica samples have separate filters.

Violations

88

17 significant & substantial (S&S)

  1. 2025 Q114
  2. 2025 Q217
  3. 2025 Q37
  4. 2025 Q410
  5. 2026 Q17
  6. 2026 Q216
  7. 2026 Q317
  8. 2026 Q4 *0

Accident records

4

0 records classified as fatality

  1. 2025 Q12
  2. 2025 Q20
  3. 2025 Q30
  4. 2025 Q40
  5. 2026 Q10
  6. 2026 Q21
  7. 2026 Q31
  8. 2026 Q4 *0

Proposed penalties · USD

24,503.00

88 of 88 violations with amounts

  1. 2025 Q12,630
  2. 2025 Q24,913
  3. 2025 Q31,498
  4. 2025 Q42,318
  5. 2026 Q11,312
  6. 2026 Q23,732
  7. 2026 Q38,100
  8. 2026 Q4 *—

On-site inspection hours

412.25

14 inspections · 14 with hours

  1. 2025 Q156.25
  2. 2025 Q281.50
  3. 2025 Q382.25
  4. 2025 Q456.00
  5. 2026 Q144.25
  6. 2026 Q239.75
  7. 2026 Q352.25
  8. 2026 Q4 *—
Quarterly safety data
QuarterViolationsS&SProposed USDAccident recordsFatality recordsInspectionsOn-site hours
2025-Q11432,630.0020456.3
2025-Q21734,913.0000281.5
2025-Q3701,498.0000182.3
2025-Q41032,318.0000356.0
2026-Q1711,312.0000244.3
2026-Q21613,732.0010139.8
2026-Q31768,100.0010152.3
2026-Q4 *00—000—

Most cited CFR sections

All violations issued in the selected period. Counts combine subsections.

Safety activity

  1. accident220262510002

    HANDLING OF MATERIALS · DAYS RESTRICTED ACTIVITY ONLY

    Accident narrative

    Miner was climbing into a haul truck after fueling up, as EE went to pull self up onto the ladder EE felt a pop and pain in EE's shoulder.

  2. violation5118958

    57.12008 · $151.00 proposed

  3. violation5118957

    57.4200(b)(2) · $151.00 proposed

  4. violation5118956

    57.14107(a) · $193.00 proposed

  5. violation5118955

    57.14100(a) · S&S · $288.00 proposed

  6. violation5118954

    57.4130(a)(2) · $151.00 proposed

  7. violation5118953

    57.11003 · $151.00 proposed

  8. violation5118952

    57.11002 · $151.00 proposed

  9. violation5118951

    57.11001 · S&S · $642.00 proposed

  10. violation5118950

    57.11002 · S&S · $336.00 proposed

  11. violation5118949

    57.11002 · S&S · $336.00 proposed

  12. violation5118948

    57.3200 · $151.00 proposed

  13. violation5118947

    57.4200(b)(2) · $165.00 proposed

  14. violation5118946

    57.4104(a) · $151.00 proposed

  15. violation5118945

    57.3200 · S&S · $3,736.00 proposed

  16. violation5118944

    57.12004 · $226.00 proposed

  17. violation5118943

    57.14205 · S&S · $755.00 proposed

  18. violation5118942

    57.14100(c) · $366.00 proposed

  19. inspectionF037BD6

    Regular Safety and Health Inspection · 52.3 on-site hours

  20. accident220261410010

    FALL OF ROOF OR BACK · DAYS RESTRICTED ACTIVITY ONLY

    Accident narrative

    Miner was loading a room with explosives from the man basket of the powder rig, when a softball sized rock fell and hit EE on the hand that was resting on the handrail, resulting in injury.

  21. violation5118899

    57.12028 · $151.00 proposed

  22. violation5118898

    57.14100(c) · $288.00 proposed

  23. violation5118897

    57.12032 · $151.00 proposed

  24. violation5118896

    57.12032 · $151.00 proposed

  25. violation5118895

    57.11050(a) · S&S · $642.00 proposed

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.

CURRENT HIERARCHYMc Carthy- Bush Corp → Linwood Mining and Minerals Corporation → Linwood Mine
HISTORY RECORDS13 relationships
INTERVAL CHECKPASScontroller/operator overlap
—

Mc Carthy- Bush CorpcontrolsLinwood Mining and Minerals CorporationoperatesLinwood Mine

msha-controller-operator-history · controller/operator co-tenure derived on mine 1300097
Other 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

116 historical accident/injury rows; 1 coded fatalities and 310 lost days across the published record.

ACCIDENT + INJURY RECORD18 since 2021
accidentsmine-production-quarterly
02 / COMPLIANCEwatch

Violations and penalties

1,264 violation rows across the full record; 216 carry an S&S flag and $338,515 appears in current assessed amounts.

ENFORCEMENT ACTIVITY336 since 2021
inspectionsviolationsassessed-violationsorders-107a
03 / HEALTHwatch

Occupational health samples

319 personal; 19 area. 29 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 EXPOSURE338 samples
personal-health-samplesarea-samples
04 / PRODUCTIONcontext

Quarterly production and employment

31K employee hours and 55 summed average employees across reported subunits in the latest published quarter.

2026-Q20 tons
mine-production-quarterlymine-production-yearly
05 / LEGALwatch

Contests, conferences and decisions

111 contested-violation rows, 111 civil-penalty docket/decision rows, and 102 conference records linked by issuance number.

POST-ISSUANCE LIFECYCLE324 linked rows
conferencescontested-violationscivil-penalty-dockets-decisions
06 / 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 CONTEXT21 linked entities
contractor-production-quarterlycontractor-production-yearlyaccidentsviolations
07 / INSPECTIONScontext

Inspections

203 inspection events and 9K published inspection hours across the historical record.

OVERSIGHT COVERAGE47 since 2021
inspectionsviolations

HEALTH SAMPLING

Silica and quartz

Matching records20 coal · 2 personal · 0 area
Sample status0 not voided0 voided · 2 status not reported
Personal samples with C/E > 102 published ratios · not a citation count
2026 · Apr 22, 2026–Apr 22, 2026
Date / sampleDataset / analyteOccupation / areaMeasurementSample statusPublished action
000000202601659000Metal/nonmetal personalQuartz, respirable, >1% QtzUtility Man0× published limitConcentration: 0000.22 · limit: 0000.00Source unit unspecifiedNot reportedNO ACTIONInspection F037BC1
000000202601659100Metal/nonmetal personalQuartz, respirable, >1% QtzUtility Man0× published limitConcentration: 0000.20 · limit: 0000.00Source unit unspecifiedNot reportedNO ACTIONInspection F037BC1
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.

RECENT PUBLIC RECORDS

Recent violations and samples

Latest records retained for inspection; aggregates above use the full source history.

VIOLATIONS12 latest shown
511895857.12008Citation
511895757.4200(b)(2)Citation
511895657.14107(a)Citation
511895557.14100(a)S&S
511895457.4130(a)(2)Citation
511895357.11003Citation
511895257.11002Citation
511895157.11001S&S
OTHER HEALTH SAMPLES7 latest shown

Coal dust, noise and other contaminants. Silica records above ↑

TC from EC @ 160Drill Operator, Jumbo Perc.
C/E: 00.00Concentration: 0000.00 · limit: 0160.00Source unit unspecified
TC @ 160Drill Operator, Jumbo Perc.
C/E: 00.84Concentration: 0134.00 · limit: 0160.00Source unit unspecified
ORGANIC CARBONDrill Operator, Jumbo Perc.
C/E: 00.00Concentration: 0078.00 · limit: 0000.00Source unit unspecified
EC @ 160Drill Operator, Jumbo Perc.
C/E: 00.35Concentration: 0056.00 · limit: 0160.00Source unit unspecified
TC from EC @ 160Scaling (mechanical)
C/E: 00.00Concentration: 0000.00 · limit: 0160.00Source unit unspecified
TC @ 160Scaling (mechanical)
C/E: 00.84Concentration: 0134.00 · limit: 0160.00Source unit unspecified
ORGANIC CARBONScaling (mechanical)
C/E: 00.00Concentration: 0047.00 · limit: 0000.00Source unit unspecified

SOURCE COVERAGE

Reporting dates and coverage

16 datasets contain linked records. Missing datasets are listed below.

DATASETROWSWINDOWSTATUS
Accident, Injuries, and Illnessessafety · contractors116Apr 3, 2000—Aug 26, 2026mine-keyed
Addresses of Recordidentity · logistics1May 16, 1974—May 16, 1974mine-keyed
Assessed Violationscompliance · legal1,259Jan 3, 2000—Jul 24, 2026mine-keyed
Civil Penalty Dockets and Decisionscompliance · legal111Jun 26, 2007—Dec 16, 2025mine-keyed
Coal Dust Sampleshealth · safety—No published rowsabsent / not applicable
Conferencescompliance · legal102Aug 17, 2000—Aug 1, 2025mine-keyed
Contested Violationscompliance · legal111Oct 20, 2006—Dec 17, 2024mine-keyed
Contractor Employment and Production — Quarterlycontractors · production · safety1,993Not published—Not publishedentity-linked
Contractor Employment and Production — Yearlycontractors · production · safety429Not published—Not publishedentity-linked
Controller and Operator Historyidentity · compliance1Jan 1, 1950—Jan 1, 1950mine-keyed
Mine Employment and Production — Quarterlyproduction · safety · compliance353Not published—Not publishedmine-keyed
Mine Employment and Production — Yearlyproduction · safety · compliance74Not published—Not publishedmine-keyed
Inspectionssafety · compliance203Jan 3, 2000—Jul 13, 2026mine-keyed
Minesidentity · production · logistics1Not published—Not publishedmine-keyed
Metal and Nonmetal Area Sampleshealth · safety19Jun 13, 2012—Nov 14, 2024mine-keyed
Metal and Nonmetal Personal Health Sampleshealth · safety319Nov 29, 2000—Apr 22, 2026mine-keyed
Noise Sampleshealth · safety · equipment—No published rowsabsent / not applicable
Quartz Samples — Coalhealth · safety—No published rowsabsent / not applicable
Violationscompliance · safety · legal1,264Jan 3, 2000—Jul 24, 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.