# Plant #4

- **MSHA mine ID:** 1002293
- **Status:** Intermittent
- **Type / commodity:** Surface / Construction Sand and Gravel
- **Location:** Ada, ID
- **Operator:** H & B Crushing LLC
- **Controller:** Robert S Hall Jr; Robert S Hall Sr; Jeffrey P Hall
- **Public source rows linked:** 131
- **Source coverage:** 10 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Robert S Hall Jr; Robert S Hall Sr; Jeffrey P Hall (0124461) → H & B Crushing LLC (0051744) → Plant #4 (1002293)**

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

## Controller and operator valid-time history

- **Steve  Dobson et al → H & B Crushing LLC:** 2017-08-17 through 2015-12-30; derived from co-tenure at mine 1002293; source `msha-controller-operator-history`.
- **Bob  Hall et al → H & B Crushing LLC:** 2017-08-17 through 2015-12-30; derived from co-tenure at mine 1002293; source `msha-controller-operator-history`.
- **Jeffrey P Hall et al → H & B Crushing LLC:** 2017-08-17 through current/open; derived from co-tenure at mine 1002293; source `msha-controller-operator-history`.
- **Robert S Hall Jr et al → H & B Crushing LLC:** 2017-08-17 through current/open; derived from co-tenure at mine 1002293; source `msha-controller-operator-history`.
- **Robert S Hall Sr et al → H & B Crushing LLC:** 2017-08-17 through current/open; derived from co-tenure at mine 1002293; source `msha-controller-operator-history`.

- History rows: 5
- Typed edges: 8
- Interval anomalies: 2
- 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 — 0 since 2021:** Accidents and injuries 0 historical accident/injury rows; 0 coded fatalities and 0 lost days across the published record.
2. **COMPLIANCE — 14 since 2021:** Violations and penalties 29 violation rows across the full record; 5 carry an S&S flag and $4,264 appears in current assessed amounts.
3. **HEALTH — 7 samples:** Occupational health samples 7 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 4K employee hours and 6 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 1 linked rows:** Contests, conferences and decisions 0 contested-violation rows, 0 civil-penalty docket/decision rows, and 1 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 — 9 since 2021:** Inspections 15 inspection events and 132 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 56.12008 — Insulation and fittings for power wires and cables.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12008
- **30 CFR 56.14107 — Moving machine parts.** (3 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14107
- **30 CFR 56.4430 — Storage facilities.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4430
- **30 CFR 56.4200 — General requirements.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4200
- **30 CFR 56.20003 — Housekeeping.** (3 retained recent rows) — 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 56.14100 — Safety defects; examination, correction and records.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14100
- **30 CFR 50.30 — Preparation and submission of MSHA Form 7000-2—Quarterly Employment and Coal Production Report.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-I/part-50/subpart-D/section-50.30

## Source coverage

- **Addresses of Record:** 1 rows; 2018-03-19 through 2018-03-19; source ID `msha-addresses`
- **Assessed Violations:** 29 rows; 2018-08-27 through 2025-10-15; source ID `msha-assessed-violations`
- **Conferences:** 1 rows; 2025-07-18 through 2025-07-18; source ID `msha-conferences`
- **Controller and Operator History:** 5 rows; 2017-08-17 through 2017-08-17; source ID `msha-controller-operator-history`
- **Inspections:** 15 rows; 2018-08-22 through 2025-10-15; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 34 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 9 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:** 7 rows; 2019-03-19 through 2025-10-15; source ID `msha-personal-health-samples`
- **Violations:** 29 rows; 2018-08-27 through 2025-10-15; 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/plant-4-1002293`
- JSON: `/api/v1/mines/plant-4-1002293`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/1002293/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/1002293/relationships`
- MCP resource: `mine://1002293/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`