# Riverside Stone

- **MSHA mine ID:** 1518549
- **Status:** Active
- **Type / commodity:** Surface / Crushed, Broken Limestone NEC
- **Location:** Meade, KY
- **Operator:** Mulzer Crushed Stone, Inc
- **Controller:** CRH PLC
- **Public source rows linked:** 1,165
- **Source coverage:** 15 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**CRH PLC (M06183) → Mulzer Crushed Stone, Inc (L00309) → Riverside Stone (1518549)**

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

## Controller and operator valid-time history

- **Pat A  Yager → Yager Materials LLC:** 2002-06-11 through 2019-01-30; derived from co-tenure at mine 1518549; source `msha-controller-operator-history`.
- **Carmeuse Holding SA → Yager Materials LLC:** 2019-01-31 through 2019-06-30; derived from co-tenure at mine 1518549; source `msha-controller-operator-history`.
- **Carmeuse Holding SA → Yager Materials Corp.:** 2019-07-01 through 2024-10-31; derived from co-tenure at mine 1518549; source `msha-controller-operator-history`.
- **Bart  Mulzer et al → Mulzer Crushed Stone, Inc:** 2024-11-01 through 2017-02-09; derived from co-tenure at mine 1518549; source `msha-controller-operator-history`.
- **CRH PLC → Mulzer Crushed Stone, Inc:** 2024-11-01 through current/open; derived from co-tenure at mine 1518549; source `msha-controller-operator-history`.

- History rows: 5
- Typed edges: 13
- 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 — 5 since 2021:** Accidents and injuries 8 historical accident/injury rows; 0 coded fatalities and 222 lost days across the published record.
2. **COMPLIANCE — 52 since 2021:** Violations and penalties 164 violation rows across the full record; 44 carry an S&S flag and $34,910 appears in current assessed amounts.
3. **HEALTH — 52 samples:** Occupational health samples 52 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 13K employee hours and 20 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 9 linked rows:** Contests, conferences and decisions 4 contested-violation rows, 4 civil-penalty docket/decision rows, and 1 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 — 22 since 2021:** Inspections 80 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 47.41 — Requirement for container labels.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-47/subpart-E/section-47.41
- **30 CFR 56.12004 — Electrical conductors.** (5 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12004
- **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 56.14100 — Safety defects; examination, correction and records.** (3 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14100
- **30 CFR 56.14109 — Unguarded conveyors with adjacent travelways.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14109

## Source coverage

- **Accident, Injuries, and Illnesses:** 8 rows; 2009-02-05 through 2025-07-15; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2002-06-11 through 2002-06-11; source ID `msha-addresses`
- **Assessed Violations:** 161 rows; 2002-09-04 through 2026-02-11; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 4 rows; 2023-10-13 through 2023-10-16; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 1 rows; 2007-12-06 through 2007-12-06; source ID `msha-conferences`
- **Contested Violations:** 4 rows; 2023-02-13 through 2023-02-15; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 397 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 101 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 5 rows; 2002-06-11 through 2024-11-01; source ID `msha-controller-operator-history`
- **Inspections:** 80 rows; 2002-09-04 through 2026-09-16; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 147 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 39 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:** 52 rows; 2004-04-28 through 2026-07-28; source ID `msha-personal-health-samples`
- **Violations:** 164 rows; 2002-09-04 through 2026-02-11; 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/riverside-stone-1518549`
- JSON: `/api/v1/mines/riverside-stone-1518549`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/1518549/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/1518549/relationships`
- MCP resource: `mine://1518549/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`