# Crawford Mine & Mill

- **MSHA mine ID:** 4100991
- **Status:** Active
- **Type / commodity:** Surface / Crushed, Broken Limestone NEC
- **Location:** Mclennan, TX
- **Operator:** Martin Marietta Minerals, Inc.
- **Controller:** Lhoist Group
- **Public source rows linked:** 1,859
- **Source coverage:** 13 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Lhoist Group (0041044) → Martin Marietta Minerals, Inc. (L13547) → Crawford Mine & Mill (4100991)**

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

## Controller and operator valid-time history

- **J W  Broughton → Tonk Products Inc:** 1950-01-01 through 1986-02-17; derived from co-tenure at mine 4100991; source `msha-controller-operator-history`.
- **Amcar Inc → Tonk Products Inc:** 1986-02-18 through 1988-01-21; derived from co-tenure at mine 4100991; source `msha-controller-operator-history`.
- **Franklin Industries Inc → Franklin Industries Incorporated:** 1988-01-22 through 2006-11-30; derived from co-tenure at mine 4100991; source `msha-controller-operator-history`.
- **Lhoist Group → Franklin Industries Incorporated:** 2006-12-01 through 2012-01-19; derived from co-tenure at mine 4100991; source `msha-controller-operator-history`.
- **Lhoist Group → Lhoist North America of Texas, LLC:** 2012-01-20 through current/open; derived from co-tenure at mine 4100991; source `msha-controller-operator-history`.
- **Chemical Lime Company → Lhoist North America of Texas, LLC:** 2012-01-20 through 1998-12-30; derived from co-tenure at mine 4100991; source `msha-controller-operator-history`.

- History rows: 6
- Typed edges: 16
- Interval anomalies: 1
- 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: 2026-10-13T11:19:05.459773+00:00.

## Assessment signals

1. **SAFETY — 3 since 2021:** Accidents and injuries 23 historical accident/injury rows; 0 coded fatalities and 517 lost days across the published record.
2. **COMPLIANCE — 58 since 2021:** Violations and penalties 219 violation rows across the full record; 49 carry an S&S flag and $48,244 appears in current assessed amounts.
3. **HEALTH — 24 samples:** Occupational health samples 24 personal. 0 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 25K employee hours and 45 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 21 linked rows:** Contests, conferences and decisions 0 contested-violation rows, 0 civil-penalty docket/decision rows, and 21 conference records linked by issuance number.
6. **CONTRACTORS — 7 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 — 19 since 2021:** Inspections 72 inspection events and 2K 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 56.12004 — Electrical conductors.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12004
- **30 CFR 56.4104 — Combustible waste.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4104
- **30 CFR 56.12025 — Grounding circuit enclosures.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12025
- **30 CFR 56.13011 — Air receiver tanks.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-L/section-56.13011
- **30 CFR 56.14207 — Parking procedures for unattended equipment.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14207
- **30 CFR 56.11001 — Safe access.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-J/section-56.11001
- **30 CFR 56.9100 — Traffic control.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-H/section-56.9100
- **30 CFR 46.7 — New task training.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-46/section-46.7
- **30 CFR 56.12030 — Correction of dangerous conditions.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12030
- **30 CFR 56.14100 — Safety defects; examination, correction and records.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14100

## Source coverage

- **Accident, Injuries, and Illnesses:** 23 rows; 2001-03-19 through 2025-09-18; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 1974-10-02 through 1974-10-02; source ID `msha-addresses`
- **Assessed Violations:** 219 rows; 2000-03-15 through 2026-06-02; source ID `msha-assessed-violations`
- **Conferences:** 21 rows; 2000-04-10 through 2026-07-01; source ID `msha-conferences`
- **Contractor Employment and Production — Quarterly:** 722 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 152 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 6 rows; 1950-01-01 through 2012-01-20; source ID `msha-controller-operator-history`
- **Inspections:** 72 rows; 2000-03-15 through 2026-06-01; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 318 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 81 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:** 24 rows; 2001-10-18 through 2025-08-13; source ID `msha-personal-health-samples`
- **Violations:** 219 rows; 2000-03-15 through 2026-06-02; 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/crawford-mine-mill-4100991`
- JSON: `/api/v1/mines/crawford-mine-mill-4100991`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/4100991/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/4100991/relationships`
- MCP resource: `mine://4100991/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`