# Trapper Mine

- **MSHA mine ID:** 0502838
- **Status:** Active
- **Type / commodity:** Surface / Coal (Bituminous)
- **Location:** Moffat, CO
- **Operator:** Trapper Mining Inc
- **Controller:** MidAmerican Energy Holdings Company; Platte River Power Authority; Salt
- **Public source rows linked:** 4,964
- **Source coverage:** 17 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**MidAmerican Energy Holdings Company; Platte River Power Authority; Salt (0159581) → Trapper Mining Inc (P14915) → Trapper Mine (0502838)**

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

## Controller and operator valid-time history

- **General Electric Company → Trapper Mining Inc:** 1976-01-01 through 1983-07-20; derived from co-tenure at mine 0502838; source `msha-controller-operator-history`.
- **Tri-State Generation & Transmsn Assoc et al → Trapper Mining Inc:** 1983-07-21 through 2020-12-31; derived from co-tenure at mine 0502838; source `msha-controller-operator-history`.
- **Salt River Project et al → Trapper Mining Inc:** 1983-07-21 through 2020-12-31; derived from co-tenure at mine 0502838; source `msha-controller-operator-history`.
- **MidAmerican Energy Holdings Company et al → Trapper Mining Inc:** 1983-07-21 through 2020-12-31; derived from co-tenure at mine 0502838; source `msha-controller-operator-history`.
- **Salt River Project et al → Trapper Mining Inc:** 2021-01-01 through current/open; derived from co-tenure at mine 0502838; source `msha-controller-operator-history`.
- **MidAmerican Energy Holdings Company et al → Trapper Mining Inc:** 2021-01-01 through current/open; derived from co-tenure at mine 0502838; source `msha-controller-operator-history`.
- **Platte River Power Authority et al → Trapper Mining Inc:** 2021-01-01 through current/open; derived from co-tenure at mine 0502838; source `msha-controller-operator-history`.

- History rows: 7
- 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 — 14 since 2021:** Accidents and injuries 174 historical accident/injury rows; 0 coded fatalities and 4,037 lost days across the published record.
2. **COMPLIANCE — 78 since 2021:** Violations and penalties 491 violation rows across the full record; 60 carry an S&S flag and $167,647 appears in current assessed amounts.
3. **HEALTH — 809 samples:** Occupational health samples 551 coal dust; 19 coal quartz; 239 noise. 0 personal-sample rows have a published C/E ratio above 1; 6 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 — 239K tons:** Quarterly production and employment 32K employee hours and 58 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 82 linked rows:** Contests, conferences and decisions 31 contested-violation rows, 33 civil-penalty docket/decision rows, and 18 conference records linked by issuance number.
6. **CONTRACTORS — 15 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 — 41 since 2021:** Inspections 151 inspection events and 10K published inspection hours across the historical record.

## EIA annual operating context

- **Reporting year:** 2024
- **Production:** 1,521,960 short tons
- **Labor hours:** 286,955
- **Average employees:** 134
- **Coal supply region:** Uinta Region
- **Union code:** International Union Of Operation Engineers
- **Published rows under this MSHA ID:** 1

## Recent Title 30 crosswalk

Snapshot current through 2026-08-19.

- **30 CFR 77.207 — Illumination.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-C/section-77.207
- **30 CFR 77.404 — Machinery and equipment; operation and maintenance.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-E/section-77.404
- **30 CFR 77.1104 — Accumulations of combustible materials.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-L/section-77.1104
- **30 CFR 77.1606 — Loading and haulage equipment; inspection and maintenance.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-Q/section-77.1606
- **30 CFR 77.1607 — Loading and haulage equipment; operation.** (3 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-Q/section-77.1607
- **30 CFR 48.29 — Records of training.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-48/subpart-B/section-48.29
- **30 CFR 77.410 — Mobile equipment; automatic warning devices.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-E/section-77.410

## Source coverage

- **Accident, Injuries, and Illnesses:** 174 rows; 2000-02-28 through 2026-02-17; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 1981-10-02 through 1981-10-02; source ID `msha-addresses`
- **Assessed Violations:** 482 rows; 2000-06-06 through 2026-04-08; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 33 rows; 2004-02-26 through 2024-04-08; source ID `msha-civil-penalty-dockets-decisions`
- **Coal Dust Samples:** 551 rows; 2000-01-31 through 2026-07-13; source ID `msha-coal-dust-samples`
- **Conferences:** 18 rows; 2000-07-21 through 2025-09-02; source ID `msha-conferences`
- **Contested Violations:** 31 rows; 2005-07-14 through 2023-01-25; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 2,042 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 461 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 7 rows; 1976-01-01 through 1983-07-21; source ID `msha-controller-operator-history`
- **Inspections:** 151 rows; 2000-01-06 through 2026-09-23; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 209 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 54 rows; unknown through unknown; source ID `msha-mine-production-yearly`
- **Mines:** 1 rows; unknown through unknown; source ID `msha-mines`
- **Noise Samples:** 239 rows; 2000-02-28 through 2026-09-23; source ID `msha-noise-samples`
- **Quartz Samples — Coal:** 19 rows; 2001-10-30 through 2026-04-07; source ID `msha-quartz-samples`
- **Violations:** 491 rows; 2000-06-06 through 2026-04-08; 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/trapper-mine-0502838`
- JSON: `/api/v1/mines/trapper-mine-0502838`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/0502838/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/0502838/relationships`
- MCP resource: `mine://0502838/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`