# Morris Ravine Mine

- **MSHA mine ID:** 0405407
- **Status:** Active
- **Type / commodity:** Surface / Construction Sand and Gravel
- **Location:** Butte, CA
- **Operator:** Mineral Resources LLC
- **Controller:** MRLLC  Investors LTD
- **Public source rows linked:** 904
- **Source coverage:** 15 / 20
- **Generated:** 2026-10-17T06:17:15.228Z

## Current entity hierarchy

**MRLLC  Investors LTD (M13231) → Mineral Resources LLC (L17352) → Morris Ravine Mine (0405407)**

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

## Controller and operator valid-time history

- **MRLLC  Investors LTD et al → Mineral Resources LLC:** 2000-01-01 through current/open; derived from co-tenure at mine 0405407; source `msha-controller-operator-history`.

- History rows: 1
- Typed edges: 3
- 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: 2026-10-17T05:35:58.500035+00:00.

## Assessment signals

1. **SAFETY — 0 since 2021:** Accidents and injuries 7 historical accident/injury rows; 0 coded fatalities and 241 lost days across the published record.
2. **COMPLIANCE — 64 since 2021:** Violations and penalties 285 violation rows across the full record; 58 carry an S&S flag and $117,822 appears in current assessed amounts.
3. **HEALTH — 16 samples:** Occupational health samples 16 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 2K employee hours and 7 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 94 linked rows:** Contests, conferences and decisions 44 contested-violation rows, 44 civil-penalty docket/decision rows, and 6 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 — 43 since 2021:** Inspections 105 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 56.11001 — Safe access.** (3 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-J/section-56.11001
- **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 56.20013 — Waste receptacles.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-S/section-56.20013
- **30 CFR 56.9313 — Roadway maintenance.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-H/section-56.9313
- **30 CFR 56.4100 — Smoking and use of open flames.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4100
- **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 56.23002 — Written safety program.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-T/section-56.23002
- **30 CFR 56.12028 — Testing grounding systems.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12028
- **30 CFR 46.9 — Records of training.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-46/section-46.9
- **30 CFR 46.4 — Training plan implementation.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-46/section-46.4

## Source coverage

- **Accident, Injuries, and Illnesses:** 7 rows; 2001-10-16 through 2014-05-04; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2001-02-28 through 2001-02-28; source ID `msha-addresses`
- **Assessed Violations:** 283 rows; 2001-07-19 through 2026-04-23; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 44 rows; 2015-01-28 through 2023-11-01; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 6 rows; 2011-12-01 through 2011-12-01; source ID `msha-conferences`
- **Contested Violations:** 44 rows; 2013-10-30 through 2022-07-06; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 42 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 8 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 1 rows; 2000-01-01 through 2000-01-01; source ID `msha-controller-operator-history`
- **Inspections:** 105 rows; 2001-03-06 through 2026-08-20; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 16 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 45 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:** 16 rows; 2003-05-22 through 2025-09-04; source ID `msha-personal-health-samples`
- **Violations:** 285 rows; 2001-07-19 through 2026-04-23; 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/morris-ravine-mine-0405407`
- JSON: `/api/v1/mines/morris-ravine-mine-0405407`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/0405407/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/0405407/relationships`
- MCP resource: `mine://0405407/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`