# Horizon Mine

- **MSHA mine ID:** 4202074
- **Status:** Abandoned and Sealed
- **Type / commodity:** Underground / Coal (Bituminous)
- **Location:** Carbon, UT
- **Operator:** Hidden Splendor Resources Inc
- **Controller:** Alexander  Walker III
- **Public source rows linked:** 8,451
- **Source coverage:** 17 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Alexander  Walker III (0111301) → Hidden Splendor Resources Inc (0051214) → Horizon Mine (4202074)**

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

## Controller and operator valid-time history

- **William R  Skaggs → Blue Blaze Coal Company:** 1992-04-01 through 1995-04-19; derived from co-tenure at mine 4202074; source `msha-controller-operator-history`.
- **Cumberland Resources Corporation → Horizon Coal Corp:** 1995-04-20 through 1997-07-10; derived from co-tenure at mine 4202074; source `msha-controller-operator-history`.
- **Scott  Kiscaden et al → Horizon Coal Corp:** 1997-07-11 through 1997-08-28; derived from co-tenure at mine 4202074; source `msha-controller-operator-history`.
- **(Donald) Todd  Kiscaden et al → Horizon Coal Corp:** 1997-07-11 through 1997-08-28; derived from co-tenure at mine 4202074; source `msha-controller-operator-history`.
- **Horizon Coal Corporation et al → Horizon Mining Llc:** 1997-08-29 through 1999-07-14; derived from co-tenure at mine 4202074; source `msha-controller-operator-history`.
- **Tokyo Boeki (USA) Inc et al → Horizon Mining Llc:** 1997-08-29 through 1999-07-14; derived from co-tenure at mine 4202074; source `msha-controller-operator-history`.
- **Iracoal Incorporated → Lodestar Energy, Inc:** 1999-07-15 through 2003-03-23; derived from co-tenure at mine 4202074; source `msha-controller-operator-history`.
- **America West Resources, Inc. → Hidden Splendor Resources Inc:** 2003-03-24 through 2013-06-30; derived from co-tenure at mine 4202074; source `msha-controller-operator-history`.
- **Alexander  Walker III → Hidden Splendor Resources Inc:** 2013-07-01 through current/open; derived from co-tenure at mine 4202074; source `msha-controller-operator-history`.

- History rows: 9
- Typed edges: 22
- 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 110 historical accident/injury rows; 0 coded fatalities and 627 lost days across the published record.
2. **COMPLIANCE — 0 since 2021:** Violations and penalties 1,792 violation rows across the full record; 622 carry an S&S flag and $2,986,890 appears in current assessed amounts.
3. **HEALTH — 1K samples:** Occupational health samples 991 coal dust; 73 coal quartz; 154 noise. 0 personal-sample rows have a published C/E ratio above 1; 12 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 0 employee hours and 0 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 1,630 linked rows:** Contests, conferences and decisions 747 contested-violation rows, 796 civil-penalty docket/decision rows, and 87 conference records linked by issuance number.
6. **CONTRACTORS — 10 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 183 inspection events and 12K 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 75.1711 — Sealing of mines.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-R/section-75.1711
- **30 CFR 50.20 — Preparation and submission of MSHA Report Form 7000-1—Mine Accident, Injury, and Illness Report.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-I/part-50/subpart-C/section-50.20
- **30 CFR 72.520 — Diesel equipment inventory.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-72/subpart-D/section-72.520
- **30 CFR 75.1909 — Nonpermissible diesel-powered equipment; design and performance requirements.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-T/section-75.1909
- **30 CFR 75.1910 — Nonpermissible diesel-powered equipment; electrical system design and performance requirements.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-T/section-75.1910
- **30 CFR 75.1914 — Maintenance of diesel-powered equipment.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-T/section-75.1914
- **30 CFR 75.601 — Short circuit protection of trailing cables.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-G/section-75.601
- **30 CFR 75.512 — Electric equipment; examination, testing and maintenance.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-F/section-75.512
- **30 CFR 49.16 — Equipment and maintenance requirements.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-49/subpart-B/section-49.16
- **30 CFR 75.517 — Power wires and cables; insulation and protection.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-F/section-75.517

## Source coverage

- **Accident, Injuries, and Illnesses:** 110 rows; 2001-12-07 through 2012-12-17; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2018-07-28 through 2018-07-28; source ID `msha-addresses`
- **Assessed Violations:** 1,747 rows; 2000-08-24 through 2013-10-29; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 796 rows; 2001-03-20 through 2015-04-21; source ID `msha-civil-penalty-dockets-decisions`
- **Coal Dust Samples:** 991 rows; 2001-11-16 through 2012-06-21; source ID `msha-coal-dust-samples`
- **Conferences:** 87 rows; 2002-07-31 through 2012-10-15; source ID `msha-conferences`
- **Contested Violations:** 747 rows; 2003-10-02 through 2013-10-29; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 1,265 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 274 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 9 rows; 1992-04-01 through 2003-03-24; source ID `msha-controller-operator-history`
- **Inspections:** 183 rows; 2000-03-15 through 2018-07-27; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 182 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 39 rows; unknown through unknown; source ID `msha-mine-production-yearly`
- **Mines:** 1 rows; unknown through unknown; source ID `msha-mines`
- **Noise Samples:** 154 rows; 2001-06-05 through 2013-03-05; source ID `msha-noise-samples`
- **Quartz Samples — Coal:** 73 rows; 2001-12-13 through 2012-06-15; source ID `msha-quartz-samples`
- **Violations:** 1,792 rows; 2000-08-24 through 2013-12-12; 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/horizon-mine-4202074`
- JSON: `/api/v1/mines/horizon-mine-4202074`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/4202074/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/4202074/relationships`
- MCP resource: `mine://4202074/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`