# Mammoth Mine

- **MSHA mine ID:** 2401524
- **Status:** Abandoned
- **Type / commodity:** Surface / Gold Ore
- **Location:** Madison, MT
- **Operator:** McDonald Excavation Inc
- **Controller:** Philip M  McDonald
- **Public source rows linked:** 59
- **Source coverage:** 11 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Philip M  McDonald (0042227) → McDonald Excavation Inc (0051643) → Mammoth Mine (2401524)**

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

## Controller and operator valid-time history

- **R O G K Inc → R O G K Inc:** 1980-03-01 through 1982-03-07; derived from co-tenure at mine 2401524; source `msha-controller-operator-history`.
- **Von Kleist Robert → South Boulder Mining Corp:** 1982-03-08 through 2012-12-18; derived from co-tenure at mine 2401524; source `msha-controller-operator-history`.
- **Paul  Antonioli → Excelsior Mining:** 2012-12-19 through 2014-02-09; derived from co-tenure at mine 2401524; source `msha-controller-operator-history`.
- **Philip M  McDonald → McDonald Excavation Inc:** 2014-02-10 through current/open; derived from co-tenure at mine 2401524; source `msha-controller-operator-history`.

- History rows: 4
- Typed edges: 12
- 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 10 violation rows across the full record; 0 carry an S&S flag and $1,468 appears in current assessed amounts.
3. **HEALTH — 2 samples:** Occupational health samples 2 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 260 employee hours and 3 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 8 linked rows:** Contests, conferences and decisions 4 contested-violation rows, 4 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 4 inspection events and 47 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 56.12004 — Electrical conductors.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12004
- **30 CFR 50.30 — Preparation and submission of MSHA Form 7000-2—Quarterly Employment and Coal Production Report.** (3 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-I/part-50/subpart-D/section-50.30
- **30 CFR 48.25 — Training of new miners; minimum courses of instruction; hours of instruction.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-48/subpart-B/section-48.25
- **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 56.4500 — Heat sources.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4500
- **30 CFR 47.41 — Requirement for container labels.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-47/subpart-E/section-47.41
- **30 CFR 56.4402 — Safety can use.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4402
- **30 CFR 56.9301 — Dump site restraints.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-H/section-56.9301

## Source coverage

- **Addresses of Record:** 1 rows; 2018-02-26 through 2018-02-26; source ID `msha-addresses`
- **Assessed Violations:** 10 rows; 2013-03-26 through 2014-05-28; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 4 rows; 2014-06-16 through 2014-06-16; source ID `msha-civil-penalty-dockets-decisions`
- **Contested Violations:** 4 rows; 2013-09-16 through 2013-09-30; source ID `msha-contested-violations`
- **Controller and Operator History:** 4 rows; 1980-03-01 through 2014-02-10; source ID `msha-controller-operator-history`
- **Inspections:** 4 rows; 2013-03-26 through 2014-05-28; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 15 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 4 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:** 2 rows; 2014-05-28 through 2014-05-28; source ID `msha-personal-health-samples`
- **Violations:** 10 rows; 2013-03-26 through 2014-05-28; 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/mammoth-mine-2401524`
- JSON: `/api/v1/mines/mammoth-mine-2401524`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/2401524/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/2401524/relationships`
- MCP resource: `mine://2401524/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`