# USMC Ione Plant

- **MSHA mine ID:** 0401878
- **Status:** Active
- **Type / commodity:** Surface / Construction Sand and Gravel
- **Location:** Amador, CA
- **Operator:** US Mine Corp
- **Controller:** John  Bremer; Brady  Barto
- **Public source rows linked:** 2,614
- **Source coverage:** 16 / 20
- **Generated:** 2026-10-17T06:17:15.228Z

## Current entity hierarchy

**John  Bremer; Brady  Barto (0196500) → US Mine Corp (0128134) → USMC Ione Plant (0401878)**

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

## Controller and operator valid-time history

- **Owens Illinois Inc → Oi Ione Sts Inc:** 1950-01-01 through 2000-06-30; derived from co-tenure at mine 0401878; source `msha-controller-operator-history`.
- **S C R-Sibelco Nv et al → Unimin Corp:** 2000-07-01 through 2015-08-30; derived from co-tenure at mine 0401878; source `msha-controller-operator-history`.
- **A Scott  Dockter → US Mine Corp:** 2015-08-31 through 2025-06-17; derived from co-tenure at mine 0401878; source `msha-controller-operator-history`.
- **Covia Holdings LLC → Unimin Corp:** 2021-01-01 through 2015-08-30; derived from co-tenure at mine 0401878; source `msha-controller-operator-history`.
- **John  Bremer et al → US Mine Corp:** 2025-06-18 through current/open; derived from co-tenure at mine 0401878; source `msha-controller-operator-history`.
- **Brady  Barto et al → US Mine Corp:** 2025-06-18 through current/open; derived from co-tenure at mine 0401878; source `msha-controller-operator-history`.

- History rows: 6
- Typed edges: 14
- 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: 2026-10-17T05:35:58.500035+00:00.

## Assessment signals

1. **SAFETY — 20 since 2021:** Accidents and injuries 58 historical accident/injury rows; 0 coded fatalities and 2,201 lost days across the published record.
2. **COMPLIANCE — 309 since 2021:** Violations and penalties 669 violation rows across the full record; 150 carry an S&S flag and $652,132 appears in current assessed amounts.
3. **HEALTH — 197 samples:** Occupational health samples 113 personal; 84 area. 3 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 23K employee hours and 40 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 90 linked rows:** Contests, conferences and decisions 35 contested-violation rows, 37 civil-penalty docket/decision rows, and 18 conference records linked by issuance number.
6. **CONTRACTORS — 11 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 — 43 since 2021:** Inspections 109 inspection events and 3K 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 56.11002 — Handrails and toeboards.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-J/section-56.11002
- **30 CFR 56.11012 — Protection for openings around travelways.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-J/section-56.11012
- **30 CFR 56.11005 — Fixed ladder anchorage and toe clearance.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-J/section-56.11005
- **30 CFR 56.4200 — General requirements.** (4 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4200
- **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 56.20003 — Housekeeping.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-S/section-56.20003

## Source coverage

- **Accident, Injuries, and Illnesses:** 58 rows; 2000-09-18 through 2025-08-06; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2016-11-06 through 2016-11-06; source ID `msha-addresses`
- **Metal and Nonmetal Area Samples:** 84 rows; 2022-01-11 through 2022-01-11; source ID `msha-area-samples`
- **Assessed Violations:** 658 rows; 2000-02-08 through 2026-04-29; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 37 rows; 2004-06-25 through 2025-08-26; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 18 rows; 2001-05-07 through 2025-02-05; source ID `msha-conferences`
- **Contested Violations:** 35 rows; 2006-07-18 through 2026-04-21; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 608 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 141 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 6 rows; 1950-01-01 through 2015-08-31; source ID `msha-controller-operator-history`
- **Inspections:** 109 rows; 2000-02-08 through 2026-05-21; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 24 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 52 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:** 113 rows; 2001-04-24 through 2026-04-22; source ID `msha-personal-health-samples`
- **Violations:** 669 rows; 2000-02-08 through 2026-04-29; 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/usmc-ione-plant-0401878`
- JSON: `/api/v1/mines/usmc-ione-plant-0401878`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/0401878/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/0401878/relationships`
- MCP resource: `mine://0401878/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`