# Bristol Sand & Gravel

- **MSHA mine ID:** 4104778
- **Status:** Active
- **Type / commodity:** Surface / Construction Sand and Gravel
- **Location:** Ellis, TX
- **Operator:** Heidelberg Materials Southwest LLC
- **Controller:** Heidelberg Materials AG
- **Public source rows linked:** 1,810
- **Source coverage:** 14 / 20
- **Generated:** 2026-10-17T06:17:15.228Z

## Current entity hierarchy

**Heidelberg Materials AG (M00004) → Heidelberg Materials Southwest LLC (0174514) → Bristol Sand & Gravel (4104778)**

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

## Controller and operator valid-time history

- **Heidelberg Materials AG → Hanson Aggregates LLC:** 2009-02-27 through 2020-12-31; derived from co-tenure at mine 4104778; source `msha-controller-operator-history`.
- **Hanson PLC → Hanson Aggregates LLC:** 2009-02-27 through 2007-08-22; derived from co-tenure at mine 4104778; source `msha-controller-operator-history`.
- **Heidelberg Materials AG → Heidelberg Materials Southwest LLC:** 2021-01-01 through current/open; derived from co-tenure at mine 4104778; source `msha-controller-operator-history`.
- **Martin Marietta Materials Inc → Hanson Aggregates LLC:** 2021-10-01 through 2020-12-31; derived from co-tenure at mine 4104778; source `msha-controller-operator-history`.

- History rows: 4
- Typed edges: 10
- 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: 2026-10-17T05:35:58.500035+00:00.

## Assessment signals

1. **SAFETY — 2 since 2021:** Accidents and injuries 6 historical accident/injury rows; 0 coded fatalities and 31 lost days across the published record.
2. **COMPLIANCE — 44 since 2021:** Violations and penalties 114 violation rows across the full record; 18 carry an S&S flag and $38,822 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 — No published quarter:** Quarterly production and employment The source remains registered, but no mine-keyed quarterly production row was published.
5. **LEGAL — 8 linked rows:** Contests, conferences and decisions 1 contested-violation rows, 1 civil-penalty docket/decision rows, and 6 conference records linked by issuance number.
6. **CONTRACTORS — 5 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 — 22 since 2021:** Inspections 48 inspection events and 870 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.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12004
- **30 CFR 56.16006 — Protection of gas cylinder valves.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-O/section-56.16006
- **30 CFR 50.20-1 — General instructions for completing MSHA Form 7000-1.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-I/part-50/subpart-C/section-50.20-1
- **30 CFR 56.4200 — General requirements.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4200
- **30 CFR 56.14200 — Warnings prior to starting or moving equipment.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14200
- **30 CFR 56.14132 — Horns and backup alarms.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14132
- **30 CFR 56.9300 — Berms or guardrails.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-H/section-56.9300
- **30 CFR 56.15001 — First-aid materials.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-N/section-56.15001
- **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
- **30 CFR 46.7 — New task training.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-46/section-46.7

## Source coverage

- **Accident, Injuries, and Illnesses:** 6 rows; 2011-04-08 through 2025-10-09; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2010-04-08 through 2010-04-08; source ID `msha-addresses`
- **Assessed Violations:** 113 rows; 2009-03-09 through 2026-07-30; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 1 rows; 2012-02-23 through 2012-02-23; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 6 rows; 2012-06-25 through 2016-09-28; source ID `msha-conferences`
- **Contested Violations:** 1 rows; 2010-10-28 through 2010-10-28; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 1,188 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 267 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 4 rows; 2009-02-27 through 2021-01-01; source ID `msha-controller-operator-history`
- **Inspections:** 48 rows; 2009-03-09 through 2026-07-30; source ID `msha-inspections`
- **Mine Employment and Production — Yearly:** 36 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; 2009-04-14 through 2024-11-19; source ID `msha-personal-health-samples`
- **Violations:** 114 rows; 2009-03-09 through 2026-07-30; 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/bristol-sand-gravel-4104778`
- JSON: `/api/v1/mines/bristol-sand-gravel-4104778`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/4104778/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/4104778/relationships`
- MCP resource: `mine://4104778/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`