# Denton Pits

- **MSHA mine ID:** 4100368
- **Status:** Active
- **Type / commodity:** Surface / Common Clays NEC
- **Location:** Denton, TX
- **Operator:** Acme Brick Company
- **Controller:** Berkshire Hathaway Inc
- **Public source rows linked:** 539
- **Source coverage:** 15 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Berkshire Hathaway Inc (M13643) → Acme Brick Company (L17877) → Denton Pits (4100368)**

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

## Controller and operator valid-time history

- **Justin Industries Inc → Acme Brick Company:** 1950-01-01 through 2000-07-31; derived from co-tenure at mine 4100368; source `msha-controller-operator-history`.
- **Berkshire Hathaway Inc → Acme Building Brands:** 2000-08-01 through 2001-12-31; derived from co-tenure at mine 4100368; source `msha-controller-operator-history`.
- **Berkshire Hathaway Inc → Acme Brick Company:** 2002-01-01 through current/open; derived from co-tenure at mine 4100368; source `msha-controller-operator-history`.

- History rows: 3
- Typed edges: 9
- 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: 2026-10-13T11:19:05.459773+00:00.

## Assessment signals

1. **SAFETY — 0 since 2021:** Accidents and injuries 8 historical accident/injury rows; 0 coded fatalities and 0 lost days across the published record.
2. **COMPLIANCE — 25 since 2021:** Violations and penalties 67 violation rows across the full record; 6 carry an S&S flag and $9,015 appears in current assessed amounts.
3. **HEALTH — 8 samples:** Occupational health samples 8 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 3K employee hours and 8 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 7 linked rows:** Contests, conferences and decisions 2 contested-violation rows, 2 civil-penalty docket/decision rows, and 3 conference records linked by issuance number.
6. **CONTRACTORS — 3 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 — 15 since 2021:** Inspections 66 inspection events and 738 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 45.4 — Independent contractor register.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-G/part-45/section-45.4
- **30 CFR 56.23003 — Requirements for written safety program.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-T/section-56.23003
- **30 CFR 56.12004 — Electrical conductors.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12004
- **30 CFR 56.12032 — Inspection and cover plates.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12032
- **30 CFR 56.14100 — Safety defects; examination, correction and records.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14100
- **30 CFR 56.15001 — First-aid materials.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-N/section-56.15001
- **30 CFR 56.18002 — Examination of working places.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-Q/section-56.18002
- **30 CFR 56.4130 — Electric substations and liquid storage facilities.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4130
- **30 CFR 56.12006 — Distribution boxes.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12006
- **30 CFR 56.12023 — Guarding electrical connections and resistor grids.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12023

## Source coverage

- **Accident, Injuries, and Illnesses:** 8 rows; 2004-09-09 through 2015-06-09; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 1992-01-08 through 1992-01-08; source ID `msha-addresses`
- **Assessed Violations:** 63 rows; 2003-02-05 through 2026-04-01; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 2 rows; 2025-02-21 through 2025-02-21; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 3 rows; 2026-09-28 through 2026-09-28; source ID `msha-conferences`
- **Contested Violations:** 2 rows; 2024-05-21 through 2024-05-21; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 41 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 8 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 3 rows; 1950-01-01 through 2002-01-01; source ID `msha-controller-operator-history`
- **Inspections:** 66 rows; 2000-04-12 through 2026-04-21; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 212 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 54 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:** 8 rows; 2015-09-22 through 2024-11-27; source ID `msha-personal-health-samples`
- **Violations:** 67 rows; 2001-08-01 through 2026-04-01; 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/denton-pits-4100368`
- JSON: `/api/v1/mines/denton-pits-4100368`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/4100368/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/4100368/relationships`
- MCP resource: `mine://4100368/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`