# Mill Creek

- **MSHA mine ID:** 3401285
- **Status:** Active
- **Type / commodity:** Surface / Crushed, Broken Granite
- **Location:** Johnston, OK
- **Operator:** Martin Marietta Materials, Inc.
- **Controller:** Martin Marietta Materials Inc
- **Public source rows linked:** 4,226
- **Source coverage:** 15 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Martin Marietta Materials Inc (M00174) → Martin Marietta Materials, Inc. (L16197) → Mill Creek (3401285)**

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

## Controller and operator valid-time history

- **St Louis-San Francisco Railway Company → Clarkland Inc:** 1980-09-01 through 1981-10-31; derived from co-tenure at mine 3401285; source `msha-controller-operator-history`.
- **Burlington Resources Inc → Meridian Aggregates Company:** 1981-11-01 through 1991-02-28; derived from co-tenure at mine 3401285; source `msha-controller-operator-history`.
- **Meridian Aggregates Company LP → Meridian Aggregates Company:** 1991-03-01 through 2001-04-02; derived from co-tenure at mine 3401285; source `msha-controller-operator-history`.
- **Martin Marietta Materials Inc → Meridian Aggregates Company LP:** 2001-04-03 through 2006-05-24; derived from co-tenure at mine 3401285; source `msha-controller-operator-history`.
- **Martin Marietta Materials Inc → Martin Marietta Materials, Inc.:** 2006-05-25 through current/open; derived from co-tenure at mine 3401285; source `msha-controller-operator-history`.

- History rows: 5
- Typed edges: 15
- 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 38 historical accident/injury rows; 0 coded fatalities and 642 lost days across the published record.
2. **COMPLIANCE — 30 since 2021:** Violations and penalties 213 violation rows across the full record; 58 carry an S&S flag and $54,113 appears in current assessed amounts.
3. **HEALTH — 38 samples:** Occupational health samples 38 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 26K employee hours and 47 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 16 linked rows:** Contests, conferences and decisions 7 contested-violation rows, 7 civil-penalty docket/decision rows, and 2 conference records linked by issuance number.
6. **CONTRACTORS — 20 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 85 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 56.14100 — Safety defects; examination, correction and records.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14100
- **30 CFR 56.14101 — Brakes.** (4 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14101
- **30 CFR 56.4201 — Inspection.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4201
- **30 CFR 56.12018 — Identification of power switches.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12018
- **30 CFR 56.14116 — Hand-held power tools.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14116
- **30 CFR 50.30 — Preparation and submission of MSHA Form 7000-2—Quarterly Employment and Coal Production Report.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-I/part-50/subpart-D/section-50.30
- **30 CFR 56.12008 — Insulation and fittings for power wires and cables.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12008
- **30 CFR 56.12023 — Guarding electrical connections and resistor grids.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12023

## Source coverage

- **Accident, Injuries, and Illnesses:** 38 rows; 2000-03-15 through 2024-03-01; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2004-03-03 through 2004-03-03; source ID `msha-addresses`
- **Assessed Violations:** 206 rows; 2000-07-21 through 2026-07-22; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 7 rows; 2006-04-07 through 2019-01-02; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 2 rows; 2006-05-23 through 2016-02-10; source ID `msha-conferences`
- **Contested Violations:** 7 rows; 2004-08-04 through 2017-11-06; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 2,589 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 635 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 5 rows; 1980-09-01 through 2006-05-25; source ID `msha-controller-operator-history`
- **Inspections:** 85 rows; 2000-01-26 through 2026-07-19; 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:** 38 rows; 2003-10-29 through 2023-12-06; source ID `msha-personal-health-samples`
- **Violations:** 213 rows; 2000-01-26 through 2026-07-22; 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/mill-creek-3401285`
- JSON: `/api/v1/mines/mill-creek-3401285`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/3401285/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/3401285/relationships`
- MCP resource: `mine://3401285/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`