# Bridgeport Plant

- **MSHA mine ID:** 4100025
- **Status:** Active
- **Type / commodity:** Surface / Crushed, Broken Limestone NEC
- **Location:** Wise, TX
- **Operator:** Heidelberg Materials Southwest LLC
- **Controller:** Heidelberg Materials AG
- **Public source rows linked:** 6,396
- **Source coverage:** 15 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Heidelberg Materials AG (M00004) → Heidelberg Materials Southwest LLC (0174514) → Bridgeport Plant (4100025)**

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

## Controller and operator valid-time history

- **Hanson PLC → Hanson Aggregates West Inc:** 1950-01-01 through 2004-05-09; derived from co-tenure at mine 4100025; source `msha-controller-operator-history`.
- **Hanson PLC → Hanson Aggregates LLC:** 2004-05-10 through 2007-08-22; derived from co-tenure at mine 4100025; source `msha-controller-operator-history`.
- **Heidelberg Materials AG → Hanson Aggregates LLC:** 2007-08-23 through 2020-12-31; derived from co-tenure at mine 4100025; source `msha-controller-operator-history`.
- **Heidelberg Materials AG → Heidelberg Materials Southwest LLC:** 2021-01-01 through current/open; derived from co-tenure at mine 4100025; 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 4100025; source `msha-controller-operator-history`.

- History rows: 5
- Typed edges: 13
- 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 — 27 since 2021:** Accidents and injuries 114 historical accident/injury rows; 0 coded fatalities and 3,199 lost days across the published record.
2. **COMPLIANCE — 120 since 2021:** Violations and penalties 352 violation rows across the full record; 59 carry an S&S flag and $130,216 appears in current assessed amounts.
3. **HEALTH — 16 samples:** Occupational health samples 16 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 78K employee hours and 120 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 73 linked rows:** Contests, conferences and decisions 12 contested-violation rows, 20 civil-penalty docket/decision rows, and 41 conference records linked by issuance number.
6. **CONTRACTORS — 24 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 — 27 since 2021:** Inspections 91 inspection events and 3K 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 56.14107 — Moving machine parts.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14107
- **30 CFR 56.4101 — Warning signs.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4101
- **30 CFR 56.16009 — Suspended loads.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-O/section-56.16009
- **30 CFR 56.14112 — Construction and maintenance of guards.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14112
- **30 CFR 56.11012 — Protection for openings around travelways.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-J/section-56.11012
- **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 56.3200 — Correction of hazardous conditions.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-B/section-56.3200
- **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 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 56.18002 — 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

## Source coverage

- **Accident, Injuries, and Illnesses:** 114 rows; 2000-03-27 through 2026-04-28; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 1976-07-04 through 1976-07-04; source ID `msha-addresses`
- **Assessed Violations:** 351 rows; 2000-01-19 through 2026-08-29; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 20 rows; 2000-11-17 through 2024-04-16; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 41 rows; 2000-02-03 through 2015-06-10; source ID `msha-conferences`
- **Contested Violations:** 12 rows; 2011-03-02 through 2022-10-11; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 4,084 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 909 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 5 rows; 1950-01-01 through 2021-01-01; source ID `msha-controller-operator-history`
- **Inspections:** 91 rows; 2000-01-19 through 2026-09-08; 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:** 16 rows; 2002-04-11 through 2025-09-24; source ID `msha-personal-health-samples`
- **Violations:** 352 rows; 2000-01-19 through 2026-08-29; 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/bridgeport-plant-4100025`
- JSON: `/api/v1/mines/bridgeport-plant-4100025`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/4100025/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/4100025/relationships`
- MCP resource: `mine://4100025/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`