# Maumee Quarry

- **MSHA mine ID:** 3300102
- **Status:** Active
- **Type / commodity:** Surface / Crushed, Broken Limestone NEC
- **Location:** Lucas, OH
- **Operator:** Stoneco Inc
- **Controller:** CRH PLC
- **Public source rows linked:** 2,193
- **Source coverage:** 15 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**CRH PLC (M06183) → Stoneco Inc (L00224) → Maumee Quarry (3300102)**

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

## Controller and operator valid-time history

- **Johnson S E Companies Inc → Stoneco Inc:** 1950-01-01 through 2003-06-15; derived from co-tenure at mine 3300102; source `msha-controller-operator-history`.
- **CRH PLC → Stoneco Inc:** 2003-06-16 through current/open; derived from co-tenure at mine 3300102; source `msha-controller-operator-history`.

- History rows: 2
- Typed edges: 5
- 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 — 6 since 2021:** Accidents and injuries 12 historical accident/injury rows; 0 coded fatalities and 342 lost days across the published record.
2. **COMPLIANCE — 36 since 2021:** Violations and penalties 101 violation rows across the full record; 28 carry an S&S flag and $17,791 appears in current assessed amounts.
3. **HEALTH — 26 samples:** Occupational health samples 26 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 10K employee hours and 14 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 15 linked rows:** Contests, conferences and decisions 6 contested-violation rows, 6 civil-penalty docket/decision rows, and 3 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 — 16 since 2021:** Inspections 67 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 50.20 — Preparation and submission of MSHA Report Form 7000-1—Mine Accident, Injury, and Illness Report.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-I/part-50/subpart-C/section-50.20
- **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 56.11012 — Protection for openings around travelways.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-J/section-56.11012
- **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 56.14107 — 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
- **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 56.23002 — Written safety program.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-T/section-56.23002
- **30 CFR 56.12004 — Electrical conductors.** (3 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12004
- **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 56.4601 — Oxygen cylinder storage.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4601

## Source coverage

- **Accident, Injuries, and Illnesses:** 12 rows; 2003-03-20 through 2025-09-29; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2016-10-24 through 2016-10-24; source ID `msha-addresses`
- **Assessed Violations:** 98 rows; 2001-01-08 through 2026-06-23; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 6 rows; 2010-05-21 through 2011-05-17; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 3 rows; 2003-08-15 through 2020-04-20; source ID `msha-conferences`
- **Contested Violations:** 6 rows; 2009-07-28 through 2026-02-04; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 1,199 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 275 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 2 rows; 1950-01-01 through 1950-01-01; source ID `msha-controller-operator-history`
- **Inspections:** 67 rows; 2000-05-22 through 2026-09-08; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 315 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:** 26 rows; 2002-07-30 through 2026-02-04; source ID `msha-personal-health-samples`
- **Violations:** 101 rows; 2001-01-08 through 2026-09-08; 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/maumee-quarry-3300102`
- JSON: `/api/v1/mines/maumee-quarry-3300102`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/3300102/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/3300102/relationships`
- MCP resource: `mine://3300102/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`