# PRINCETON QUARRY

- **MSHA mine ID:** 3100077
- **Status:** Active
- **Type / commodity:** Surface / Crushed, Broken Traprock
- **Location:** Johnston, NC
- **Operator:** Hanson Aggregates Southeast, LLC
- **Controller:** Heidelberg Materials AG
- **Public source rows linked:** 3,691
- **Source coverage:** 15 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Heidelberg Materials AG (M00004) → Hanson Aggregates Southeast, LLC (L16897) → PRINCETON QUARRY (3100077)**

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

## Controller and operator valid-time history

- **Nello L  Teer Jr et al → Nello L Teer Company:** 1950-01-01 through 1980-04-14; derived from co-tenure at mine 3100077; source `msha-controller-operator-history`.
- **Koppers Company Inc → Nello L Teer Company:** 1980-04-15 through 1988-11-13; derived from co-tenure at mine 3100077; source `msha-controller-operator-history`.
- **Hanson PLC → Hanson Aggregates Carolina Inc:** 1988-11-14 through 2002-05-07; derived from co-tenure at mine 3100077; source `msha-controller-operator-history`.
- **Hanson PLC → Hanson Aggregates Southeast, LLC:** 2002-05-08 through 2007-08-22; derived from co-tenure at mine 3100077; source `msha-controller-operator-history`.
- **Heidelberg Materials AG → Hanson Aggregates Southeast, LLC:** 2007-08-23 through current/open; derived from co-tenure at mine 3100077; source `msha-controller-operator-history`.

- History rows: 5
- Typed edges: 14
- 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 — 2 since 2021:** Accidents and injuries 14 historical accident/injury rows; 0 coded fatalities and 349 lost days across the published record.
2. **COMPLIANCE — 39 since 2021:** Violations and penalties 190 violation rows across the full record; 46 carry an S&S flag and $78,181 appears in current assessed amounts.
3. **HEALTH — 66 samples:** Occupational health samples 66 personal. 2 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 16K employee hours and 26 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 51 linked rows:** Contests, conferences and decisions 23 contested-violation rows, 23 civil-penalty docket/decision rows, and 5 conference records linked by issuance number.
6. **CONTRACTORS — 26 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 — 24 since 2021:** Inspections 95 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 56.14207 — 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 56.12004 — Electrical conductors.** (3 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12004
- **30 CFR 56.4603 — Closure of valves.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4603
- **30 CFR 56.16006 — Protection of gas cylinder valves.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-O/section-56.16006
- **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 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 56.20014 — Prohibited areas for food and beverages.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-S/section-56.20014
- **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 56.14132 — 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

## Source coverage

- **Accident, Injuries, and Illnesses:** 14 rows; 2005-07-13 through 2025-06-13; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 1977-09-14 through 1977-09-14; source ID `msha-addresses`
- **Assessed Violations:** 181 rows; 2000-02-09 through 2026-08-12; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 23 rows; 2006-11-24 through 2022-05-19; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 5 rows; 2004-08-20 through 2024-03-27; source ID `msha-conferences`
- **Contested Violations:** 23 rows; 2006-03-07 through 2021-01-25; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 2,193 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 495 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 5 rows; 1950-01-01 through 2002-05-08; source ID `msha-controller-operator-history`
- **Inspections:** 95 rows; 2000-02-09 through 2026-08-25; 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:** 66 rows; 2004-12-07 through 2026-08-26; source ID `msha-personal-health-samples`
- **Violations:** 190 rows; 2000-02-09 through 2026-08-26; 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/princeton-quarry-3100077`
- JSON: `/api/v1/mines/princeton-quarry-3100077`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/3100077/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/3100077/relationships`
- MCP resource: `mine://3100077/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`