# Crab Orchard Mine and Mill

- **MSHA mine ID:** 4000087
- **Status:** Active
- **Type / commodity:** Underground / Crushed, Broken Limestone NEC
- **Location:** Cumberland, TN
- **Operator:** Martin Marietta Materials, Inc.
- **Controller:** Martin Marietta Materials Inc
- **Public source rows linked:** 4,486
- **Source coverage:** 16 / 20
- **Generated:** 2026-10-17T06:17:15.228Z

## Current entity hierarchy

**Martin Marietta Materials Inc (M00174) → Martin Marietta Materials, Inc. (L16197) → Crab Orchard Mine and Mill (4000087)**

Current identity source: `msha-mines`. This is a current snapshot, not a historical claim.

## Controller and operator valid-time history

- **Franklin Industries Inc → Lhoist North America of Tennessee, LLC:** 1950-01-01 through 2006-11-30; derived from co-tenure at mine 4000087; source `msha-controller-operator-history`.
- **Lhoist Group → Lhoist North America of Tennessee, LLC:** 2006-12-01 through 2026-09-16; derived from co-tenure at mine 4000087; source `msha-controller-operator-history`.
- **Martin Marietta Materials Inc → Martin Marietta Materials, Inc.:** 2026-09-17 through current/open; derived from co-tenure at mine 4000087; source `msha-controller-operator-history`.

- History rows: 3
- Typed edges: 8
- Interval anomalies: 0
- Valid-time bounds: inclusive; date granularity; null end means open-ended in the upstream history row; not independent proof of present control.
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00.

## Assessment signals

1. **SAFETY — 3 since 2021:** Accidents and injuries 45 historical accident/injury rows; 0 coded fatalities and 671 lost days across the published record.
2. **COMPLIANCE — 74 since 2021:** Violations and penalties 740 violation rows across the full record; 228 carry an S&S flag and $224,377 appears in current assessed amounts.
3. **HEALTH — 327 samples:** Occupational health samples 307 personal; 20 area. 4 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.
4. **PRODUCTION — 0 tons:** Quarterly production and employment 45K employee hours and 62 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 64 linked rows:** Contests, conferences and decisions 17 contested-violation rows, 17 civil-penalty docket/decision rows, and 30 conference records linked by issuance number.
6. **CONTRACTORS — 28 linked entities:** 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.
7. **INSPECTIONS — 36 since 2021:** Inspections 202 inspection events and 9K published inspection hours across the historical record.

## EIA annual operating context

No matched record in the 2024 EIA coal-public workbook. This may be inapplicable for a non-coal operation.

## Recent Title 30 crosswalk

Snapshot current through 2026-08-19.

- **30 CFR 57.4201 — Inspection.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-C/section-57.4201
- **30 CFR 57.12018 — Identification of power switches.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-K/section-57.12018
- **30 CFR 57.3200 — Correction of hazardous conditions.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-B/section-57.3200
- **30 CFR 57.14112 — Construction and maintenance of guards.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-M/section-57.14112
- **30 CFR 57.14132 — Horns and backup alarms for surface equipment.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-M/section-57.14132
- **30 CFR 57.12030 — Correction of dangerous conditions.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-K/section-57.12030
- **30 CFR 57.12008 — Insulation and fittings for power wires and cables.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-K/section-57.12008
- **30 CFR 57.14130 — Roll-over protective structures (ROPS) and seat belts for surface equipment.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-M/section-57.14130
- **30 CFR 57.12032 — Inspection and cover plates.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-K/section-57.12032

## Source coverage

- **Accident, Injuries, and Illnesses:** 45 rows; 2000-05-16 through 2025-01-06; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 1992-01-01 through 1992-01-01; source ID `msha-addresses`
- **Metal and Nonmetal Area Samples:** 20 rows; 2022-04-27 through 2026-03-27; source ID `msha-area-samples`
- **Assessed Violations:** 735 rows; 2000-01-26 through 2026-08-05; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 17 rows; 2010-05-25 through 2020-12-31; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 30 rows; 2001-01-05 through 2022-12-05; source ID `msha-conferences`
- **Contested Violations:** 17 rows; 2008-08-12 through 2020-06-03; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 1,816 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 432 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 3 rows; 1950-01-01 through 2026-09-17; source ID `msha-controller-operator-history`
- **Inspections:** 202 rows; 2000-01-24 through 2026-08-03; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 36 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 84 rows; unknown through unknown; source ID `msha-mine-production-yearly`
- **Mines:** 1 rows; unknown through unknown; source ID `msha-mines`
- **Metal and Nonmetal Personal Health Samples:** 307 rows; 2002-07-17 through 2026-03-27; source ID `msha-personal-health-samples`
- **Violations:** 740 rows; 2000-01-26 through 2026-08-05; source ID `msha-violations`

## Caveats

- This is public-record decision support, not legal advice or an official MSHA record.
- Missing data can indicate no event, publication delay, an unresolved identity, or inapplicability.
- Contractor production data is entity-level and is not attributed to this mine.

## Alternate representations

- HTML: `/mines/crab-orchard-mine-and-mill-4000087`
- JSON: `/api/v1/mines/crab-orchard-mine-and-mill-4000087`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/4000087/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/4000087/relationships`
- MCP resource: `mine://4000087/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`