# Martin Marietta - Piney River Quarry

- **MSHA mine ID:** 4400035
- **Status:** Active
- **Type / commodity:** Surface / Crushed, Broken Stone NEC
- **Location:** Nelson, VA
- **Operator:** Martin Marietta Materials, Inc.
- **Controller:** Martin Marietta Materials Inc
- **Public source rows linked:** 1,214
- **Source coverage:** 15 / 20
- **Generated:** 2026-10-17T06:17:15.228Z

## Current entity hierarchy

**Martin Marietta Materials Inc (M00174) → Martin Marietta Materials, Inc. (L16197) → Martin Marietta - Piney River Quarry (4400035)**

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

## Controller and operator valid-time history

- **Shirley T  Hancock → Dominion Stone Plant Inc:** 1950-01-01 through 1988-07-31; derived from co-tenure at mine 4400035; source `msha-controller-operator-history`.
- **Boxley Materials Co → Boxley Materials Company:** 1988-08-01 through 2016-03-20; derived from co-tenure at mine 4400035; source `msha-controller-operator-history`.
- **Summit Materials LLC → Boxley Materials Company:** 2016-03-21 through 2025-02-09; derived from co-tenure at mine 4400035; source `msha-controller-operator-history`.
- **Quikrete Holdings Inc. → Boxley Materials Company:** 2025-02-10 through 2026-03-22; derived from co-tenure at mine 4400035; source `msha-controller-operator-history`.
- **Martin Marietta Materials Inc → Martin Marietta Materials, Inc.:** 2026-03-23 through current/open; derived from co-tenure at mine 4400035; source `msha-controller-operator-history`.

- History rows: 5
- Typed edges: 13
- 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: 2026-10-17T05:35:58.500035+00:00.

## Assessment signals

1. **SAFETY — 0 since 2021:** Accidents and injuries 6 historical accident/injury rows; 0 coded fatalities and 3 lost days across the published record.
2. **COMPLIANCE — 5 since 2021:** Violations and penalties 74 violation rows across the full record; 14 carry an S&S flag and $10,785 appears in current assessed amounts.
3. **HEALTH — 32 samples:** Occupational health samples 32 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 7K employee hours and 10 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 10 linked rows:** Contests, conferences and decisions 2 contested-violation rows, 2 civil-penalty docket/decision rows, and 6 conference records linked by issuance number.
6. **CONTRACTORS — 4 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 — 15 since 2021:** Inspections 69 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 56.14132 — 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 56.14100 — 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.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-S/section-56.20003
- **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 56.4200 — 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 56.14101 — Brakes.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14101
- **30 CFR 56.4501 — Fuel lines.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4501
- **30 CFR 46.9 — Records of training.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-46/section-46.9
- **30 CFR 46.3 — Training plans.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-46/section-46.3
- **30 CFR 46.5 — New miner training.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-46/section-46.5
- **30 CFR 41.12 — Changes; notification by operator.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-G/part-41/subpart-B/section-41.12
- **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

## Source coverage

- **Accident, Injuries, and Illnesses:** 6 rows; 2000-06-23 through 2018-10-22; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 1983-03-18 through 1983-03-18; source ID `msha-addresses`
- **Assessed Violations:** 74 rows; 2000-05-31 through 2026-01-12; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 2 rows; 2006-07-14 through 2011-09-15; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 6 rows; 2004-06-29 through 2018-10-18; source ID `msha-conferences`
- **Contested Violations:** 2 rows; 2006-02-14 through 2010-11-02; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 699 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 126 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 5 rows; 1950-01-01 through 2026-03-23; source ID `msha-controller-operator-history`
- **Inspections:** 69 rows; 2000-05-25 through 2026-09-29; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 36 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:** 32 rows; 2004-06-22 through 2026-09-23; source ID `msha-personal-health-samples`
- **Violations:** 74 rows; 2000-05-31 through 2026-01-12; 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/martin-marietta-piney-river-quarry-4400035`
- JSON: `/api/v1/mines/martin-marietta-piney-river-quarry-4400035`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/4400035/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/4400035/relationships`
- MCP resource: `mine://4400035/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`