# Riverside Plant #11

- **MSHA mine ID:** 2302035
- **Status:** Intermittent
- **Type / commodity:** Surface / Construction Sand and Gravel
- **Location:** Platte, MO
- **Operator:** Holliday Sand & Gravel
- **Controller:** CRH PLC
- **Public source rows linked:** 673
- **Source coverage:** 13 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**CRH PLC (M06183) → Holliday Sand & Gravel (0094885) → Riverside Plant #11 (2302035)**

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

## Controller and operator valid-time history

- **List & Clark Construction Company → Holliday Sand & Gravel Company:** 1991-02-01 through 2008-07-31; derived from co-tenure at mine 2302035; source `msha-controller-operator-history`.
- **Ash Grove Cement Company → Holliday Sand & Gravel:** 2008-08-01 through 2018-06-20; derived from co-tenure at mine 2302035; source `msha-controller-operator-history`.
- **CRH PLC → Holliday Sand & Gravel:** 2018-06-21 through current/open; derived from co-tenure at mine 2302035; source `msha-controller-operator-history`.

- History rows: 3
- Typed edges: 8
- 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 — 1 since 2021:** Accidents and injuries 74 historical accident/injury rows; 0 coded fatalities and 706 lost days across the published record.
2. **COMPLIANCE — 0 since 2021:** Violations and penalties 75 violation rows across the full record; 17 carry an S&S flag and $12,130 appears in current assessed amounts.
3. **HEALTH — 92 samples:** Occupational health samples 92 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 9K employee hours and 9 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 33 linked rows:** Contests, conferences and decisions 14 contested-violation rows, 14 civil-penalty docket/decision rows, and 5 conference records linked by issuance number.
6. **CONTRACTORS — 0 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 — 7 since 2021:** Inspections 73 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 56.18002 — Examination of working places.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-Q/section-56.18002
- **30 CFR 56.11002 — Handrails and toeboards.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-J/section-56.11002
- **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 56.14112 — Construction and maintenance of guards.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14112
- **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 50.20 — Preparation and submission of MSHA Report Form 7000-1—Mine Accident, Injury, and Illness Report.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-I/part-50/subpart-C/section-50.20
- **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 56.14107 — 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 56.12005 — Protection of power conductors from mobile equipment.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12005
- **30 CFR 56.4130 — Electric substations and liquid storage facilities.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4130

## Source coverage

- **Accident, Injuries, and Illnesses:** 74 rows; 2000-01-14 through 2026-04-28; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2025-10-06 through 2025-10-06; source ID `msha-addresses`
- **Assessed Violations:** 73 rows; 2001-04-11 through 2018-11-06; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 14 rows; 2005-10-31 through 2012-10-16; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 5 rows; 2004-12-13 through 2008-07-10; source ID `msha-conferences`
- **Contested Violations:** 14 rows; 2004-11-23 through 2010-07-29; source ID `msha-contested-violations`
- **Controller and Operator History:** 3 rows; 1991-02-01 through 2008-08-01; source ID `msha-controller-operator-history`
- **Inspections:** 73 rows; 2001-04-11 through 2026-07-01; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 197 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 51 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:** 92 rows; 2001-04-12 through 2022-08-12; source ID `msha-personal-health-samples`
- **Violations:** 75 rows; 2001-04-11 through 2018-11-06; 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-plant-11-2302035`
- JSON: `/api/v1/mines/riverside-plant-11-2302035`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/2302035/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/2302035/relationships`
- MCP resource: `mine://2302035/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`