# Gads Hill Plant

- **MSHA mine ID:** 2301372
- **Status:** Active
- **Type / commodity:** Surface / Crushed, Broken Granite
- **Location:** Wayne, MO
- **Operator:** GS II/Bird/CertainTeed
- **Controller:** Saint-Gobain
- **Public source rows linked:** 1,656
- **Source coverage:** 12 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Saint-Gobain (M08468) → GS II/Bird/CertainTeed (L16911) → Gads Hill Plant (2301372)**

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

## Controller and operator valid-time history

- **Missouri Pacific Corp → Quality Aggregate Company:** 1950-01-01 through 1984-01-09; derived from co-tenure at mine 2301372; source `msha-controller-operator-history`.
- **Union Pacific Corp → Quality Aggregate Company:** 1984-01-10 through 1996-09-16; derived from co-tenure at mine 2301372; source `msha-controller-operator-history`.
- **Newgen Holding Inc → Gs Roofing Products Company Inc:** 1996-09-17 through 1999-06-08; derived from co-tenure at mine 2301372; source `msha-controller-operator-history`.
- **Saint-Gobain → GS II/Bird/CertainTeed:** 1999-06-09 through current/open; derived from co-tenure at mine 2301372; source `msha-controller-operator-history`.

- History rows: 4
- Typed edges: 12
- 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 — 7 since 2021:** Accidents and injuries 28 historical accident/injury rows; 0 coded fatalities and 780 lost days across the published record.
2. **COMPLIANCE — 22 since 2021:** Violations and penalties 170 violation rows across the full record; 28 carry an S&S flag and $26,180 appears in current assessed amounts.
3. **HEALTH — 93 samples:** Occupational health samples 93 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 27K employee hours and 59 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 0 linked rows:** Contests, conferences and decisions 0 contested-violation rows, 0 civil-penalty docket/decision rows, and 0 conference records linked by issuance number.
6. **CONTRACTORS — 3 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 71 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 56.12018 — Identification of power switches.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12018
- **30 CFR 56.12032 — Inspection and cover plates.** (3 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12032
- **30 CFR 56.12023 — Guarding electrical connections and resistor grids.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12023
- **30 CFR 56.12028 — Testing grounding systems.** (3 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12028
- **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
- **30 CFR 56.12006 — Distribution boxes.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12006
- **30 CFR 56.4102 — Spillage and leakage.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4102
- **30 CFR 56.16006 — Protection of gas cylinder valves.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-O/section-56.16006

## Source coverage

- **Accident, Injuries, and Illnesses:** 28 rows; 2000-02-05 through 2026-06-26; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 1975-02-20 through 1975-02-20; source ID `msha-addresses`
- **Assessed Violations:** 170 rows; 2000-03-01 through 2026-08-26; source ID `msha-assessed-violations`
- **Contractor Employment and Production — Quarterly:** 592 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 129 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 4 rows; 1950-01-01 through 1999-06-09; source ID `msha-controller-operator-history`
- **Inspections:** 71 rows; 2000-03-01 through 2026-08-25; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 316 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:** 93 rows; 2001-08-08 through 2025-10-22; source ID `msha-personal-health-samples`
- **Violations:** 170 rows; 2000-03-01 through 2026-08-26; 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/gads-hill-plant-2301372`
- JSON: `/api/v1/mines/gads-hill-plant-2301372`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/2301372/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/2301372/relationships`
- MCP resource: `mine://2301372/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`