# New Horizon Mine

- **MSHA mine ID:** 0500299
- **Status:** Abandoned
- **Type / commodity:** Surface / Coal (Bituminous)
- **Location:** Montrose, CO
- **Operator:** Elk Ridge Mining and Reclamation LLC
- **Controller:** Tri-State Generation and Transmission Assn Inc
- **Public source rows linked:** 1,864
- **Source coverage:** 17 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Tri-State Generation and Transmission Assn Inc (0126261) → Elk Ridge Mining and Reclamation LLC (P22080) → New Horizon Mine (0500299)**

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

## Controller and operator valid-time history

- **Kennecott Copper Corp → Peabody Coal Company:** 1950-01-01 through 1977-06-30; derived from co-tenure at mine 0500299; source `msha-controller-operator-history`.
- **Hanson PLC → Peabody Coal Company:** 1977-07-01 through 1992-06-30; derived from co-tenure at mine 0500299; source `msha-controller-operator-history`.
- **Tri-State Generation & Transmission Assn Inc et al → Elk Ridge Mining and Reclamation LLC:** 1992-07-01 through 2016-06-07; derived from co-tenure at mine 0500299; source `msha-controller-operator-history`.
- **Western Fuels Assoc Inc et al → Elk Ridge Mining and Reclamation LLC:** 1992-07-01 through 2016-06-07; derived from co-tenure at mine 0500299; source `msha-controller-operator-history`.
- **Tri-State Generation and Transmission Assn Inc → Elk Ridge Mining and Reclamation LLC:** 2016-06-08 through current/open; derived from co-tenure at mine 0500299; source `msha-controller-operator-history`.

- History rows: 5
- 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 12 historical accident/injury rows; 0 coded fatalities and 485 lost days across the published record.
2. **COMPLIANCE — 0 since 2021:** Violations and penalties 136 violation rows across the full record; 22 carry an S&S flag and $10,771 appears in current assessed amounts.
3. **HEALTH — 325 samples:** Occupational health samples 208 coal dust; 6 coal quartz; 111 noise. 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 4K employee hours and 9 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 45 linked rows:** Contests, conferences and decisions 2 contested-violation rows, 15 civil-penalty docket/decision rows, and 28 conference records linked by issuance number.
6. **CONTRACTORS — 8 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 69 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 77.1605 — Loading and haulage equipment; installations.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-Q/section-77.1605
- **30 CFR 77.502 — Electric equipment; examination, testing, and maintenance.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-F/section-77.502
- **30 CFR 77.403-1 — Mobile equipment; rollover protective structures (ROPS).** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-E/section-77.403-1
- **30 CFR 77.1707 — First aid equipment; location; minimum requirements.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-R/section-77.1707
- **30 CFR 77.1606 — Loading and haulage equipment; inspection and maintenance.** (3 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-Q/section-77.1606
- **30 CFR 77.1110 — Examination and maintenance of firefighting equipment.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-L/section-77.1110
- **30 CFR 77.404 — Machinery and equipment; operation and maintenance.** (1 retained recent row) — 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 77.400 — Mechanical equipment guards.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-E/section-77.400

## Source coverage

- **Accident, Injuries, and Illnesses:** 12 rows; 2000-04-11 through 2018-02-05; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2019-01-24 through 2019-01-24; source ID `msha-addresses`
- **Assessed Violations:** 136 rows; 2000-05-30 through 2018-08-14; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 15 rows; 2000-07-04 through 2008-09-05; source ID `msha-civil-penalty-dockets-decisions`
- **Coal Dust Samples:** 208 rows; 2000-05-31 through 2018-11-07; source ID `msha-coal-dust-samples`
- **Conferences:** 28 rows; 2000-07-25 through 2008-02-04; source ID `msha-conferences`
- **Contested Violations:** 2 rows; 2005-01-21 through 2007-09-06; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 759 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 181 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 5 rows; 1950-01-01 through 1992-07-01; source ID `msha-controller-operator-history`
- **Inspections:** 69 rows; 2000-05-30 through 2019-01-10; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 154 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 40 rows; unknown through unknown; source ID `msha-mine-production-yearly`
- **Mines:** 1 rows; unknown through unknown; source ID `msha-mines`
- **Noise Samples:** 111 rows; 2000-05-31 through 2017-03-07; source ID `msha-noise-samples`
- **Quartz Samples — Coal:** 6 rows; 2002-04-03 through 2016-04-06; source ID `msha-quartz-samples`
- **Violations:** 136 rows; 2000-05-30 through 2018-08-14; 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/new-horizon-mine-0500299`
- JSON: `/api/v1/mines/new-horizon-mine-0500299`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/0500299/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/0500299/relationships`
- MCP resource: `mine://0500299/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`