# Midlothian Quarry and Plant

- **MSHA mine ID:** 4100071
- **Status:** Active
- **Type / commodity:** Facility / Cement
- **Location:** Ellis, TX
- **Operator:** Continental Cement Company, LLC
- **Controller:** Quikrete Holdings Inc.
- **Public source rows linked:** 11,766
- **Source coverage:** 15 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Quikrete Holdings Inc. (M12812) → Continental Cement Company, LLC (L14647) → Midlothian Quarry and Plant (4100071)**

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

## Controller and operator valid-time history

- **Texas Industries Inc → TXI (A/K/A Texas Industries Inc):** 1950-01-01 through 2005-03-14; derived from co-tenure at mine 4100071; source `msha-controller-operator-history`.
- **Texas Industries Inc → Martin Marietta North Texas Cement, LLC:** 2005-03-15 through 2014-07-01; derived from co-tenure at mine 4100071; source `msha-controller-operator-history`.
- **Martin Marietta Materials Inc → Martin Marietta North Texas Cement, LLC:** 2014-07-02 through 2026-03-04; derived from co-tenure at mine 4100071; source `msha-controller-operator-history`.
- **Summit Materials LLC → Continental Cement Company, LLC:** 2026-03-05 through 2025-02-09; derived from co-tenure at mine 4100071; source `msha-controller-operator-history`.
- **Continental Cement Holding Company → Continental Cement Company, LLC:** 2026-03-05 through 2011-05-30; derived from co-tenure at mine 4100071; source `msha-controller-operator-history`.
- **Quikrete Holdings Inc. → Continental Cement Company, LLC:** 2026-03-05 through current/open; derived from co-tenure at mine 4100071; source `msha-controller-operator-history`.

- History rows: 6
- Typed edges: 15
- Interval anomalies: 2
- 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 — 19 since 2021:** Accidents and injuries 293 historical accident/injury rows; 3 coded fatalities and 3,703 lost days across the published record.
2. **COMPLIANCE — 233 since 2021:** Violations and penalties 896 violation rows across the full record; 183 carry an S&S flag and $489,588 appears in current assessed amounts.
3. **HEALTH — 44 samples:** Occupational health samples 44 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 107K employee hours and 211 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 367 linked rows:** Contests, conferences and decisions 109 contested-violation rows, 141 civil-penalty docket/decision rows, and 117 conference records linked by issuance number.
6. **CONTRACTORS — 62 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 — 28 since 2021:** Inspections 117 inspection events and 6K 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 56.14116 — Hand-held power tools.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14116
- **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
- **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 56.12019 — Access to stationary electrical equipment or switchgear.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12019
- **30 CFR 56.12008 — Insulation and fittings for power wires and cables.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12008
- **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 56.14207 — Parking procedures for unattended equipment.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14207
- **30 CFR 56.12028 — Testing grounding systems.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12028
- **30 CFR 56.20003 — Housekeeping.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-S/section-56.20003

## Source coverage

- **Accident, Injuries, and Illnesses:** 293 rows; 2000-01-06 through 2025-07-09; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 1976-07-04 through 1976-07-04; source ID `msha-addresses`
- **Assessed Violations:** 886 rows; 2000-03-07 through 2026-05-28; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 141 rows; 2001-01-24 through 2025-08-26; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 117 rows; 2000-05-15 through 2022-12-21; source ID `msha-conferences`
- **Contested Violations:** 109 rows; 2003-05-14 through 2024-11-26; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 7,284 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 1,472 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 6 rows; 1950-01-01 through 2026-03-05; source ID `msha-controller-operator-history`
- **Inspections:** 117 rows; 2000-03-07 through 2026-05-26; 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:** 44 rows; 2003-08-27 through 2024-12-01; source ID `msha-personal-health-samples`
- **Violations:** 896 rows; 2000-03-07 through 2026-05-28; 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/midlothian-quarry-and-plant-4100071`
- JSON: `/api/v1/mines/midlothian-quarry-and-plant-4100071`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/4100071/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/4100071/relationships`
- MCP resource: `mine://4100071/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`