ALL STATUSES / CONTROLLER PORTFOLIO

Koppers Company Inc

Membership and operating status are from the latest MSHA Mines snapshot. Open a mine for its ownership history.

MSHA CONTROLLER IDM00002

MINE PORTFOLIO

19 of 19 mines and facilities

2025-01-01 – 2026-10-17. All statuses records; production reporting is not required.

MineLocation / typeCoal · short tonsHours workedViolationsAccident recordsOn-site inspection hours
A6j4800530 · AbandonedAlbany, WYSurface · MSHA: Construction Sand and Gravel——00—
A6j-24800560 · AbandonedAlbany, WYSurface · MSHA: Construction Sand and Gravel——00—
Allegany Pit And Mill3000818 · AbandonedCattaraugus, NYSurface · MSHA: Construction Sand and Gravel——00—
Carbon Mountain Pit0502031 · AbandonedJefferson, COSurface · MSHA: Construction Sand and Gravel——00—
Currie Pit0501884 · AbandonedLarimer, COSurface · MSHA: Construction Sand and Gravel——00—
Erie Sand Steamship Company Sand An3603174 · AbandonedErie, PASurface · MSHA: Construction Sand and Gravel——00—
Estes Pit & Plant0503014 · AbandonedLarimer, COSurface · MSHA: Construction Sand and Gravel——00—
Flint Hill4400032 · AbandonedRappahannock, VASurface · MSHA: Crushed, Broken Granite——00—
Fredericksburg Pit No 24404001 · AbandonedStafford, VASurface · MSHA: Construction Sand and Gravel——00—
Fredericksburg Stone Company4402967 · AbandonedSpotsylvania, VASurface · MSHA: Crushed, Broken Granite——00—
Hornbuckle Sand Pit4801372 · AbandonedConverse, WYSurface · MSHA: Construction Sand and Gravel——00—
Johnson Pit0501038 · AbandonedLarimer, COSurface · MSHA: Construction Sand and Gravel——00—
Laramie Quarry4801441 · AbandonedAlbany, WYSurface · MSHA: Crushed, Broken Limestone NEC——00—
Little Commander0504030 · AbandonedKit Carson, COSurface · MSHA: Construction Sand and Gravel——00—
Oakwood Plant3000046 · AbandonedCayuga, NYSurface · MSHA: Crushed, Broken Limestone NEC——00—
Patterson Pit0503214 · AbandonedLarimer, COSurface · MSHA: Construction Sand and Gravel——00—
Pit No 170503539 · AbandonedJefferson, COSurface · MSHA: Construction Sand and Gravel——00—
Schureman0501952 · AbandonedLarimer, COSurface · MSHA: Construction Sand and Gravel——00—
State Rock Pit4800024 · AbandonedAlbany, WYSurface · MSHA: Crushed, Broken Limestone NEC——00—

LOCATION

Portfolio map

0 of 19 mines with usable MSHA coordinates. Select a marker to open a mine.

2025-01-01 – 2026-10-17Applies to production, safety and portfolio metrics. Silica samples have separate filters.

Violations

0

0 significant & substantial (S&S)

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

Accident records

0

0 records classified as fatality

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

Proposed penalties · USD

—

0 of 0 violations with amounts

  1. 2025 Q1—
  2. 2025 Q2—
  3. 2025 Q3—
  4. 2025 Q4—
  5. 2026 Q1—
  6. 2026 Q2—
  7. 2026 Q3—
  8. 2026 Q4 *—

On-site inspection hours

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0 inspections · 0 with hours

  1. 2025 Q1—
  2. 2025 Q2—
  3. 2025 Q3—
  4. 2025 Q4—
  5. 2026 Q1—
  6. 2026 Q2—
  7. 2026 Q3—
  8. 2026 Q4 *—
Quarterly safety data
QuarterViolationsS&SProposed USDAccident recordsFatality recordsInspectionsOn-site hours
2025-Q100—000—
2025-Q200—000—
2025-Q300—000—
2025-Q400—000—
2026-Q100—000—
2026-Q200—000—
2026-Q300—000—
2026-Q4 *00—000—

Most cited CFR sections

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

SectionViolationsS&S

No violation records in this period.

Safety activity

    No matching records in this period.

    Safety sources and definitions

    MSHA Violations (issue date), Accidents (accident date), and Inspections (begin date). Snapshot 2026-10-17.

    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.

    SELECTED PORTFOLIO

    12 linked operators.

    Relationships reflect the selected mine status and current MSHA controller/operator fields.