# Plumstead Materials

- **MSHA mine ID:** 3608548
- **Status:** Active
- **Type / commodity:** Surface / Crushed, Broken Limestone NEC
- **Location:** Bucks, PA
- **Operator:** Naceville Materials J.V.
- **Controller:** Naceville Materials Inc; Haines & Kibblehouse Inc
- **Public source rows linked:** 1,552
- **Source coverage:** 15 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Naceville Materials Inc; Haines & Kibblehouse Inc (M36589) → Naceville Materials J.V. (L36589) → Plumstead Materials (3608548)**

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

## Controller and operator valid-time history

- **Robert  S  Miller et al → Miller & Son Paving Inc:** 1996-03-01 through 2015-04-12; derived from co-tenure at mine 3608548; source `msha-controller-operator-history`.
- **George R  Miller III et al → Miller & Son Paving Inc:** 1996-03-01 through 2015-04-12; derived from co-tenure at mine 3608548; source `msha-controller-operator-history`.
- **Haines & Kibblehouse Inc et al → Naceville Materials J.V.:** 2015-04-13 through current/open; derived from co-tenure at mine 3608548; source `msha-controller-operator-history`.
- **Naceville Materials Inc  et al → Naceville Materials J.V.:** 2015-04-13 through current/open; derived from co-tenure at mine 3608548; source `msha-controller-operator-history`.

- History rows: 4
- Typed edges: 8
- 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 — 8 since 2021:** Accidents and injuries 13 historical accident/injury rows; 0 coded fatalities and 48 lost days across the published record.
2. **COMPLIANCE — 39 since 2021:** Violations and penalties 199 violation rows across the full record; 55 carry an S&S flag and $40,748 appears in current assessed amounts.
3. **HEALTH — 38 samples:** Occupational health samples 38 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 12K employee hours and 19 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 3 linked rows:** Contests, conferences and decisions 1 contested-violation rows, 1 civil-penalty docket/decision rows, and 1 conference records linked by issuance number.
6. **CONTRACTORS — 12 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 — 12 since 2021:** Inspections 70 inspection events and 1K 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.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12004
- **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 56.14100 — Safety defects; examination, correction and records.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14100
- **30 CFR 56.20003 — Housekeeping.** (3 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-S/section-56.20003
- **30 CFR 56.9314 — Trimming stockpile and muckpile faces.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-H/section-56.9314
- **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 56.14207 — Parking procedures for unattended equipment.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14207
- **30 CFR 56.11002 — Handrails and toeboards.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-J/section-56.11002
- **30 CFR 56.14103 — Operators stations.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14103

## Source coverage

- **Accident, Injuries, and Illnesses:** 13 rows; 2002-02-05 through 2026-04-10; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 1996-03-05 through 1996-03-05; source ID `msha-addresses`
- **Assessed Violations:** 198 rows; 2000-06-28 through 2026-07-01; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 1 rows; 2020-03-04 through 2020-03-04; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 1 rows; 2019-09-23 through 2019-09-23; source ID `msha-conferences`
- **Contested Violations:** 1 rows; 2019-09-13 through 2019-09-13; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 598 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 163 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 4 rows; 1996-03-01 through 2015-04-13; source ID `msha-controller-operator-history`
- **Inspections:** 70 rows; 2000-06-28 through 2026-06-25; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 210 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:** 38 rows; 2001-05-15 through 2025-10-29; source ID `msha-personal-health-samples`
- **Violations:** 199 rows; 2000-06-28 through 2026-07-01; 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/plumstead-materials-3608548`
- JSON: `/api/v1/mines/plumstead-materials-3608548`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/3608548/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/3608548/relationships`
- MCP resource: `mine://3608548/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`