MSHA DATABASEMSHA records · 16 contributing sources · snapshot Oct 18, 2026

MINE DETAILS

Federal Underground

ActiveUndergroundCrushed, Broken Limestone NEC
MSHA MINE ID1102814
LOCATIONCook, IL
PUBLIC RECORD4,672 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 – 2026-10-18Applies to production, safety and portfolio metrics. Silica samples have separate filters.

Violations

42

4 significant & substantial (S&S)

  1. 2025 Q14
  2. 2025 Q24
  3. 2025 Q35
  4. 2025 Q47
  5. 2026 Q14
  6. 2026 Q29
  7. 2026 Q39
  8. 2026 Q4 *0

Accident records

4

0 records classified as fatality

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

Proposed penalties · USD

52,330.00

41 of 42 violations with amounts

  1. 2025 Q1720
  2. 2025 Q2604
  3. 2025 Q344,107
  4. 2025 Q42,660
  5. 2026 Q1789
  6. 2026 Q21,359
  7. 2026 Q32,091
  8. 2026 Q4 *—

On-site inspection hours

232.25

11 inspections · 11 with hours

  1. 2025 Q129.00
  2. 2025 Q233.25
  3. 2025 Q346.75
  4. 2025 Q440.50
  5. 2026 Q115.50
  6. 2026 Q231.50
  7. 2026 Q335.75
  8. 2026 Q4 *—
Quarterly safety data
QuarterViolationsS&SProposed USDAccident recordsFatality recordsInspectionsOn-site hours
2025-Q140720.0000229.0
2025-Q240604.0010133.3
2025-Q35144,107.0000346.8
2025-Q4722,660.0000140.5
2026-Q140789.0020115.5
2026-Q2901,359.0000131.5
2026-Q3912,091.0010235.8
2026-Q4 *00—000—

Most cited CFR sections

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

Safety activity

  1. violation5118144

    57.12004 · $151.00 proposed

  2. violation5118143

    57.4104(b)(1) · $151.00 proposed

  3. inspectionF0336FD

    Regular Safety and Health Inspection · 15.5 on-site hours

  4. accident220260400029

    HANDTOOLS (NONPOWERED) · DAYS AWAY FROM WORK ONLY

    Accident narrative

    To maintain safe access, employee was cleaning undercarriage on excavator with a short-handled scraper. As employee was cleaning, they struck steel and jarred their shoulder. Employee was seen at a clinic, returned to work full duty, after a period of improvement, on 2/2, clinic referred employee for physical therapy. continues to work full duty, but PT makes it an MTI

  5. violation5118134

    57.14100(c) · S&S · $226.00 proposed

  6. violation5118133

    57.14130(h) · S&S · $1,679.00 proposed

  7. violation5118132

    57.11003 · $151.00 proposed

  8. violation5118131

    57.20003(a) · $151.00 proposed

  9. violation5118130

    57.4102 · $151.00 proposed

  10. violation5118128

    57.14110 · $151.00 proposed

  11. violation5118129

    57.12004 · $151.00 proposed

  12. inspectionF01B87F

    Regular Safety and Health Inspection · 40.5 on-site hours

  13. inspectionF022348

    Compliance Follow-up Inspection · 2.5 on-site hours

  14. violation9695988

    57.19000

  15. inspectionF022344

    Compliance Follow-up Inspection · 2.8 on-site hours

  16. violation9695974

    57.11051(a) · $21,713.00 proposed

  17. violation9695973

    57.11056 · $21,713.00 proposed

  18. violation9695972

    57.3200 · S&S · $504.00 proposed

  19. violation9695971

    57.18013 · $177.00 proposed

  20. inspectionF02233D

    Regular Safety and Health Inspection · 41.5 on-site hours

  21. accident220252160029

    HANDLING OF MATERIALS · DAYS AWAY FROM WORK ONLY

    Accident narrative

    Employee was cleaning a drain trough. when they went to replace the grate (80#) over the trough, they felt a strain in left shoulder. Reported to supv. Contacted clinic, who advised RICE and OTC ibuprofen. No restrictions at that time. At follow appt. 5/28, placed employee on weight restriction R arm- first day restricted 5/28/25

  22. violation9695924

    57.12004 · $151.00 proposed

  23. violation9695923

    57.4602 · $151.00 proposed

  24. violation9695922

    57.14100(c) · $151.00 proposed

  25. violation9695921

    57.14207 · $151.00 proposed

Safety sources and definitions

MSHA Violations (issue date), Accidents (accident date), and Inspections (begin date). Snapshot 2026-10-18.

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 HIERARCHYHeidelberg Materials AG → Heidelberg Materials Midwest Agg, Inc. → Federal Underground
HISTORY RECORDS511 relationships
INTERVAL CHECK1 REVIEWcontroller/operator overlap
—

Heidelberg Materials AGcontrolsHeidelberg Materials Midwest Agg, Inc.operatesFederal Underground

msha-controller-operator-history · controller/operator co-tenure derived on mine 1102814
—

Hanson PLCcontrolsHeidelberg Materials Midwest Agg, Inc.operatesFederal Underground

msha-controller-operator-history · controller/operator co-tenure derived on mine 1102814
—

Heidelberg Materials AGcontrolsHanson Material ServiceoperatesFederal Underground

msha-controller-operator-history · controller/operator co-tenure derived on mine 1102814
—

Hanson PLCcontrolsHanson Material ServiceoperatesFederal Underground

msha-controller-operator-history · controller/operator co-tenure derived on mine 1102814
—

General Dynamics CorpcontrolsHanson Material ServiceoperatesFederal Underground

msha-controller-operator-history · controller/operator co-tenure derived on mine 1102814
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

18 historical accident/injury rows; 0 coded fatalities and 551 lost days across the published record.

ACCIDENT + INJURY RECORD9 since 2021
accidentsmine-production-quarterly
02 / COMPLIANCEwatch

Violations and penalties

305 violation rows across the full record; 55 carry an S&S flag and $75,372 appears in current assessed amounts.

ENFORCEMENT ACTIVITY167 since 2021
inspectionsviolationsassessed-violationsorders-107a
03 / HEALTHwatch

Occupational health samples

112 personal; 10 area. 5 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 EXPOSURE122 samples
personal-health-samplesarea-samples
04 / PRODUCTIONcontext

Quarterly production and employment

19K employee hours and 28 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

8 contested-violation rows, 8 civil-penalty docket/decision rows, and 1 conference records linked by issuance number.

POST-ISSUANCE LIFECYCLE17 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 CONTEXT19 linked entities
contractor-production-quarterlycontractor-production-yearlyaccidentsviolations
07 / INSPECTIONScontext

Inspections

86 inspection events and 3K published inspection hours across the historical record.

OVERSIGHT COVERAGE39 since 2021
inspectionsviolations

HEALTH SAMPLING

Silica and quartz

Matching records00 coal · 0 personal · 0 area
Sample status0 not voided0 voided · 0 status not reported
Personal samples with C/E > 1—0 published ratios · not a citation count
2026 · No reported dates in this selection
Date / sampleDataset / analyteOccupation / areaMeasurementSample statusPublished 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.

RECENT PUBLIC RECORDS

Recent violations and samples

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

VIOLATIONS12 latest shown
511944057.12004Citation
511943957.14109(b)(1)Citation
511943857.12032Citation
511943757.4104(b)(2)Citation
511943657.4201(a)(2)Citation
511943557.12028Citation
511943457.14132(a)Citation
511943347.44(b)Citation
OTHER HEALTH SAMPLES8 latest shown

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

TC from EC @ 160Blaster, Powder Gang
C/E: 00.00Concentration: 0000.00 · limit: 0160.00Source unit unspecified
TC @ 160Blaster, Powder Gang
C/E: 00.49Concentration: 0079.00 · limit: 0160.00Source unit unspecified
ORGANIC CARBONBlaster, Powder Gang
C/E: 00.00Concentration: 0000.00 · limit: 0000.00Source unit unspecified
EC @ 160Blaster, Powder Gang
C/E: 00.37Concentration: 0059.00 · limit: 0160.00Source unit unspecified
TC from EC @ 160Blaster, Powder Gang
C/E: 00.00Concentration: 0000.00 · limit: 0160.00Source unit unspecified
TC @ 160Blaster, Powder Gang
C/E: 00.66Concentration: 0105.00 · limit: 0160.00Source unit unspecified
ORGANIC CARBONBlaster, Powder Gang
C/E: 00.00Concentration: 0000.00 · limit: 0000.00Source unit unspecified
EC @ 160Blaster, Powder Gang
C/E: 00.51Concentration: 0081.00 · limit: 0160.00Source unit unspecified

SOURCE COVERAGE

Reporting dates and coverage

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

DATASETROWSWINDOWSTATUS
Accident, Injuries, and Illnessessafety · contractors18Mar 21, 2016—Jul 11, 2026mine-keyed
Addresses of Recordidentity · logistics1Apr 2, 2014—Apr 2, 2014mine-keyed
Assessed Violationscompliance · legal301Mar 11, 2004—Jul 28, 2026mine-keyed
Civil Penalty Dockets and Decisionscompliance · legal8Apr 20, 2017—Jun 18, 2026mine-keyed
Coal Dust Sampleshealth · safety—No published rowsabsent / not applicable
Conferencescompliance · legal1Oct 13, 2016—Oct 13, 2016mine-keyed
Contested Violationscompliance · legal8Aug 23, 2016—Jul 31, 2025mine-keyed
Contractor Employment and Production — Quarterlycontractors · production · safety2,954Not published—Not publishedentity-linked
Contractor Employment and Production — Yearlycontractors · production · safety649Not published—Not publishedentity-linked
Controller and Operator Historyidentity · compliance5Nov 1, 1984—Feb 1, 2021mine-keyed
Mine Employment and Production — Quarterlyproduction · safety · compliance183Not published—Not publishedmine-keyed
Mine Employment and Production — Yearlyproduction · safety · compliance30Not published—Not publishedmine-keyed
Inspectionssafety · compliance86Mar 10, 2004—Jul 13, 2026mine-keyed
Minesidentity · production · logistics1Not published—Not publishedmine-keyed
Metal and Nonmetal Area Sampleshealth · safety10Sep 1, 2022—Nov 20, 2024mine-keyed
Metal and Nonmetal Personal Health Sampleshealth · safety112Sep 11, 2014—Nov 20, 2024mine-keyed
Noise Sampleshealth · safety · equipment—No published rowsabsent / not applicable
Quartz Samples — Coalhealth · safety—No published rowsabsent / not applicable
Violationscompliance · safety · legal305Mar 11, 2004—Jul 28, 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.