# White Rock Quarry

- **MSHA mine ID:** 3300091
- **Status:** Intermittent
- **Type / commodity:** Surface / Crushed, Broken Limestone NEC
- **Location:** Ottawa, OH
- **Operator:** Stoneco, Inc.
- **Controller:** CRH PLC
- **Public source rows linked:** 2,408
- **Source coverage:** 13 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**CRH PLC (M06183) → Stoneco, Inc. (L00224) → White Rock Quarry (3300091)**

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

## Controller and operator valid-time history

- **Thomas D  Kraemer et al → Edward Kraemer & Sons Inc:** 1950-01-01 through 1992-04-14; derived from co-tenure at mine 3300091; source `msha-controller-operator-history`.
- **Scott  Peterson et al → Edward Kraemer & Sons Inc:** 1950-01-01 through 1992-04-14; derived from co-tenure at mine 3300091; source `msha-controller-operator-history`.
- **Heritage Group & Crh Plc → White Rock Quarry, LLC:** 1992-04-15 through 2007-02-19; derived from co-tenure at mine 3300091; source `msha-controller-operator-history`.
- **Johnson S E Companies Inc → Stoneco, Inc.:** 2007-02-20 through 2003-06-15; derived from co-tenure at mine 3300091; source `msha-controller-operator-history`.
- **CRH PLC → Stoneco, Inc.:** 2007-02-20 through current/open; derived from co-tenure at mine 3300091; source `msha-controller-operator-history`.

- History rows: 5
- Typed edges: 12
- Interval anomalies: 1
- 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 24 historical accident/injury rows; 0 coded fatalities and 69 lost days across the published record.
2. **COMPLIANCE — 19 since 2021:** Violations and penalties 124 violation rows across the full record; 30 carry an S&S flag and $21,013 appears in current assessed amounts.
3. **HEALTH — 76 samples:** Occupational health samples 76 personal. 1 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 13K employee hours and 22 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 7 linked rows:** Contests, conferences and decisions 0 contested-violation rows, 0 civil-penalty docket/decision rows, and 7 conference records linked by issuance number.
6. **CONTRACTORS — 8 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 — 9 since 2021:** Inspections 77 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 56.20003 — Housekeeping.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-S/section-56.20003
- **30 CFR 56.11001 — Safe access.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-J/section-56.11001
- **30 CFR 56.14112 — Construction and maintenance of guards.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14112
- **30 CFR 56.14205 — Machinery, equipment, and tools.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14205
- **30 CFR 56.12004 — Electrical conductors.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12004
- **30 CFR 56.20011 — Barricades and warning signs.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-S/section-56.20011
- **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 50.30-1 — General instructions for completing MSHA Form 7000-2.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-I/part-50/subpart-D/section-50.30-1

## Source coverage

- **Accident, Injuries, and Illnesses:** 24 rows; 2000-09-18 through 2025-06-23; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2023-11-28 through 2023-11-28; source ID `msha-addresses`
- **Assessed Violations:** 124 rows; 2000-04-11 through 2026-08-18; source ID `msha-assessed-violations`
- **Conferences:** 7 rows; 2006-12-08 through 2023-06-05; source ID `msha-conferences`
- **Contractor Employment and Production — Quarterly:** 1,314 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 256 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 5 rows; 1950-01-01 through 2007-02-20; source ID `msha-controller-operator-history`
- **Inspections:** 77 rows; 2000-04-11 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:** 76 rows; 2000-07-26 through 2025-06-10; source ID `msha-personal-health-samples`
- **Violations:** 124 rows; 2000-04-11 through 2026-08-18; 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/white-rock-quarry-3300091`
- JSON: `/api/v1/mines/white-rock-quarry-3300091`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/3300091/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/3300091/relationships`
- MCP resource: `mine://3300091/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`