# BLUE MOUNTAIN MINERALS

- **MSHA mine ID:** 0404716
- **Status:** Active
- **Type / commodity:** Surface / Crushed, Broken Limestone NEC
- **Location:** Tuolumne, CA
- **Operator:** Blue Mountain Minerals
- **Controller:** Portola Minerals Company
- **Public source rows linked:** 1,854
- **Source coverage:** 15 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Portola Minerals Company (M10356) → Blue Mountain Minerals (L13595) → BLUE MOUNTAIN MINERALS (0404716)**

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

## Controller and operator valid-time history

- **Daniel E  Cripe  et al → Blue Mountain Quarries:** 1984-07-01 through 1987-12-21; derived from co-tenure at mine 0404716; source `msha-controller-operator-history`.
- **Bechtel & Sequoia Ventures Inc → Blue Mountain Minerals:** 1987-12-22 through 1994-08-09; derived from co-tenure at mine 0404716; source `msha-controller-operator-history`.
- **Portola Minerals Company → Blue Mountain Minerals:** 1994-08-10 through current/open; derived from co-tenure at mine 0404716; source `msha-controller-operator-history`.

- History rows: 3
- Typed edges: 9
- 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 — 18 since 2021:** Accidents and injuries 77 historical accident/injury rows; 0 coded fatalities and 1,267 lost days across the published record.
2. **COMPLIANCE — 113 since 2021:** Violations and penalties 355 violation rows across the full record; 73 carry an S&S flag and $125,622 appears in current assessed amounts.
3. **HEALTH — 43 samples:** Occupational health samples 43 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 33K employee hours and 67 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 98 linked rows:** Contests, conferences and decisions 22 contested-violation rows, 22 civil-penalty docket/decision rows, and 54 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 — 18 since 2021:** Inspections 85 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 56.20003 — Housekeeping.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-S/section-56.20003
- **30 CFR 56.14132 — Horns and backup alarms.** (3 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14132
- **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 56.17001 — Illumination of surface working areas.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-P/section-56.17001
- **30 CFR 48.27 — Training of miners assigned to a task in which they have had no previous experience; minimum courses of instruction.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-48/subpart-B/section-48.27
- **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 56.14207 — Parking procedures for unattended equipment.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14207
- **30 CFR 56.14101 — Brakes.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14101

## Source coverage

- **Accident, Injuries, and Illnesses:** 77 rows; 2000-01-27 through 2026-04-13; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 1991-10-06 through 1991-10-06; source ID `msha-addresses`
- **Assessed Violations:** 353 rows; 2001-01-09 through 2026-07-15; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 22 rows; 2010-09-27 through 2025-09-02; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 54 rows; 2001-02-05 through 2026-08-26; source ID `msha-conferences`
- **Contested Violations:** 22 rows; 2009-11-17 through 2025-05-15; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 349 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 90 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 3 rows; 1984-07-01 through 1994-08-10; source ID `msha-controller-operator-history`
- **Inspections:** 85 rows; 2001-01-09 through 2026-07-13; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 318 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:** 43 rows; 2001-01-10 through 2026-02-25; source ID `msha-personal-health-samples`
- **Violations:** 355 rows; 2001-01-09 through 2026-07-15; 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/blue-mountain-minerals-0404716`
- JSON: `/api/v1/mines/blue-mountain-minerals-0404716`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/0404716/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/0404716/relationships`
- MCP resource: `mine://0404716/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`