# Irelan Mine

- **MSHA mine ID:** 0404319
- **Status:** Abandoned
- **Type / commodity:** Underground / Gold Ore
- **Location:** Sierra, CA
- **Operator:** HAROLD MASON LIVING TR DTD 9-25-96 AS AMENDED
- **Controller:** Daniel  Mason
- **Public source rows linked:** 42
- **Source coverage:** 8 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Daniel  Mason (0106483) → HAROLD MASON LIVING TR DTD 9-25-96 AS AMENDED (0125278) → Irelan Mine (0404319)**

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

## Controller and operator valid-time history

- **Mason → Mason:** 1979-01-01 through 2012-09-27; derived from co-tenure at mine 0404319; source `msha-controller-operator-history`.
- **Daniel  Mason → HAROLD MASON LIVING TR DTD 9-25-96 AS AMENDED:** 2012-09-28 through current/open; derived from co-tenure at mine 0404319; source `msha-controller-operator-history`.

- History rows: 2
- Typed edges: 6
- 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 — 0 since 2021:** Accidents and injuries 0 historical accident/injury rows; 0 coded fatalities and 0 lost days across the published record.
2. **COMPLIANCE — 0 since 2021:** Violations and penalties 20 violation rows across the full record; 2 carry an S&S flag and $2,541 appears in current assessed amounts.
3. **HEALTH — 0 samples:** Occupational health samples No published samples. 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 — No published quarter:** Quarterly production and employment The source remains registered, but no mine-keyed quarterly production row was published.
5. **LEGAL — 4 linked rows:** Contests, conferences and decisions 2 contested-violation rows, 2 civil-penalty docket/decision rows, and 0 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 — 0 since 2021:** Inspections 3 inspection events and 52 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 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
- **30 CFR 57.8520 — Ventilation plan.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-G/section-57.8520
- **30 CFR 57.11053 — Escape and evacuation plans.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-J/section-57.11053
- **30 CFR 41.12 — Changes; notification by operator.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-G/part-41/subpart-B/section-41.12
- **30 CFR 48.3 — Training plans; time of submission; where filed; information required; time for approval; method for disapproval; commencement of training; approval of instructors.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-48/subpart-A/section-48.3
- **30 CFR 57.4560 — Mine entrances.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-C/section-57.4560
- **30 CFR 57.20032 — Two-way communication equipment for underground operations.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-S/section-57.20032
- **30 CFR 57.18013 — Emergency communications system.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-Q/section-57.18013
- **30 CFR 49.2 — Availability of mine rescue teams.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-49/subpart-A/section-49.2
- **30 CFR 57.1000 — Notification of commencement of operations and closing of mines.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-A/section-57.1000

## Source coverage

- **Addresses of Record:** 1 rows; 2013-01-09 through 2013-01-09; source ID `msha-addresses`
- **Assessed Violations:** 11 rows; 2012-08-22 through 2013-01-08; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 2 rows; 2013-06-05 through 2014-02-19; source ID `msha-civil-penalty-dockets-decisions`
- **Contested Violations:** 2 rows; 2012-08-22 through 2013-01-08; source ID `msha-contested-violations`
- **Controller and Operator History:** 2 rows; 1979-01-01 through 2012-09-28; source ID `msha-controller-operator-history`
- **Inspections:** 3 rows; 2012-08-21 through 2013-01-08; source ID `msha-inspections`
- **Mines:** 1 rows; unknown through unknown; source ID `msha-mines`
- **Violations:** 20 rows; 2012-08-22 through 2013-01-08; 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/irelan-mine-0404319`
- JSON: `/api/v1/mines/irelan-mine-0404319`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/0404319/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/0404319/relationships`
- MCP resource: `mine://0404319/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`