# Champ Quarry

- **MSHA mine ID:** 2300220
- **Status:** Active
- **Type / commodity:** Surface / Crushed, Broken Limestone NEC
- **Location:** St Louis, MO
- **Operator:** Martin Marietta Materials, Inc.
- **Controller:** Martin Marietta Materials Inc
- **Public source rows linked:** 1,869
- **Source coverage:** 15 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Martin Marietta Materials Inc (M00174) → Martin Marietta Materials, Inc. (L16197) → Champ Quarry (2300220)**

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

## Controller and operator valid-time history

- **John R  Weber → Fred Weber Inc:** 1950-01-01 through 1986-12-23; derived from co-tenure at mine 2300220; source `msha-controller-operator-history`.
- **Fred Weber, Inc. → Fred Weber Inc:** 1986-12-24 through 2021-06-30; derived from co-tenure at mine 2300220; source `msha-controller-operator-history`.
- **42 North Resources Partners II LP et al → New Frontier Materials Operations Alpha, LLC:** 2021-07-01 through 2026-06-14; derived from co-tenure at mine 2300220; source `msha-controller-operator-history`.
- **PEPI Capital, L.P. et al → New Frontier Materials Operations Alpha, LLC:** 2021-07-01 through 2026-06-14; derived from co-tenure at mine 2300220; source `msha-controller-operator-history`.
- **RWNIH-OP Holdings LLC et al → New Frontier Materials Operations Alpha, LLC:** 2021-07-01 through 2026-06-14; derived from co-tenure at mine 2300220; source `msha-controller-operator-history`.
- **Martin Marietta Materials Inc → Martin Marietta Materials, Inc.:** 2026-06-15 through current/open; derived from co-tenure at mine 2300220; source `msha-controller-operator-history`.

- History rows: 6
- 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 — 10 since 2021:** Accidents and injuries 74 historical accident/injury rows; 1 coded fatalities and 427 lost days across the published record.
2. **COMPLIANCE — 25 since 2021:** Violations and penalties 113 violation rows across the full record; 19 carry an S&S flag and $91,475 appears in current assessed amounts.
3. **HEALTH — 110 samples:** Occupational health samples 110 personal. 10 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 29K employee hours and 51 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 31 linked rows:** Contests, conferences and decisions 12 contested-violation rows, 12 civil-penalty docket/decision rows, and 7 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 — 24 since 2021:** Inspections 90 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 56.4101 — Warning signs.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4101
- **30 CFR 56.14107 — Moving machine parts.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14107
- **30 CFR 56.9100 — Traffic control.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-H/section-56.9100
- **30 CFR 56.5001 — Exposure limits for airborne contaminants.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-D/section-56.5001
- **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 56.14130 — Roll-over protective structures (ROPS) and seat belts.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14130
- **30 CFR 56.11001 — Safe access.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-J/section-56.11001
- **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 56.12032 — Inspection and cover plates.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12032

## Source coverage

- **Accident, Injuries, and Illnesses:** 74 rows; 2000-01-26 through 2026-04-21; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2011-11-01 through 2011-11-01; source ID `msha-addresses`
- **Assessed Violations:** 110 rows; 2001-04-11 through 2026-03-10; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 12 rows; 2006-11-02 through 2019-04-02; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 7 rows; 2003-02-28 through 2013-04-29; source ID `msha-conferences`
- **Contested Violations:** 12 rows; 2006-04-13 through 2018-10-09; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 769 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 165 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 6 rows; 1950-01-01 through 2026-06-15; source ID `msha-controller-operator-history`
- **Inspections:** 90 rows; 2000-05-02 through 2026-08-18; 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:** 110 rows; 2004-08-12 through 2025-09-03; source ID `msha-personal-health-samples`
- **Violations:** 113 rows; 2001-04-11 through 2026-08-19; 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/champ-quarry-2300220`
- JSON: `/api/v1/mines/champ-quarry-2300220`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/2300220/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/2300220/relationships`
- MCP resource: `mine://2300220/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`