# Princeton Mine

- **MSHA mine ID:** 1500013
- **Status:** Active
- **Type / commodity:** Underground / Crushed, Broken Sandstone
- **Location:** Caldwell, KY
- **Operator:** Rogers Group Inc
- **Controller:** Rogers Group Inc
- **Public source rows linked:** 3,249
- **Source coverage:** 16 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Rogers Group Inc (M00452) → Rogers Group Inc (L06514) → Princeton Mine (1500013)**

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

## Controller and operator valid-time history

- **Koppers Company Inc → Kentucky Stone Company:** 1950-01-01 through 1988-11-13; derived from co-tenure at mine 1500013; source `msha-controller-operator-history`.
- **Hanson PLC → Hanson Aggregates Midwest Inc:** 1988-11-14 through 2000-11-30; derived from co-tenure at mine 1500013; source `msha-controller-operator-history`.
- **Rogers Group Inc → Rogers Group Inc:** 2000-12-01 through current/open; derived from co-tenure at mine 1500013; source `msha-controller-operator-history`.
- **Heidelberg Materials AG → Hanson Aggregates Midwest Inc:** 2007-08-23 through 2000-11-30; derived from co-tenure at mine 1500013; source `msha-controller-operator-history`.

- History rows: 4
- Typed edges: 11
- 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 — 3 since 2021:** Accidents and injuries 3 historical accident/injury rows; 0 coded fatalities and 155 lost days across the published record.
2. **COMPLIANCE — 31 since 2021:** Violations and penalties 224 violation rows across the full record; 58 carry an S&S flag and $70,392 appears in current assessed amounts.
3. **HEALTH — 208 samples:** Occupational health samples 192 personal; 16 area. 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 20K employee hours and 38 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 116 linked rows:** Contests, conferences and decisions 57 contested-violation rows, 57 civil-penalty docket/decision rows, and 2 conference records linked by issuance number.
6. **CONTRACTORS — 9 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 — 32 since 2021:** Inspections 153 inspection events and 4K 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 57.4104 — Combustible waste.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-C/section-57.4104
- **30 CFR 57.12028 — Testing grounding systems.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-K/section-57.12028
- **30 CFR 57.9315 — Dust control.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-H/section-57.9315
- **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 57.14207 — Parking procedures for unattended equipment.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-M/section-57.14207
- **30 CFR 57.14107 — Moving machine parts.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-M/section-57.14107
- **30 CFR 57.4130 — Surface electric substations and liquid storage facilities.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-C/section-57.4130
- **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 56.12001 — Circuit overload protection.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12001
- **30 CFR 57.12032 — Inspection and cover plates.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-K/section-57.12032
- **30 CFR 56.12021 — Danger signs.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12021
- **30 CFR 56.12020 — Protection of persons at switchgear.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12020

## Source coverage

- **Accident, Injuries, and Illnesses:** 3 rows; 2024-06-20 through 2026-07-07; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2011-11-15 through 2011-11-15; source ID `msha-addresses`
- **Metal and Nonmetal Area Samples:** 16 rows; 2008-07-26 through 2026-09-15; source ID `msha-area-samples`
- **Assessed Violations:** 218 rows; 2002-04-11 through 2025-11-21; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 57 rows; 2007-06-18 through 2016-09-08; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 2 rows; 2013-12-26 through 2021-11-17; source ID `msha-conferences`
- **Contested Violations:** 57 rows; 2006-04-04 through 2015-10-26; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 1,499 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 332 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 4 rows; 1950-01-01 through 2000-12-01; source ID `msha-controller-operator-history`
- **Inspections:** 153 rows; 2000-06-01 through 2026-10-01; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 400 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 90 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:** 192 rows; 2002-02-06 through 2026-09-15; source ID `msha-personal-health-samples`
- **Violations:** 224 rows; 2002-04-11 through 2026-10-06; 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-mine-1500013`
- JSON: `/api/v1/mines/princeton-mine-1500013`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/1500013/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/1500013/relationships`
- MCP resource: `mine://1500013/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`