# Sanborn Creek Mine

- **MSHA mine ID:** 0504452
- **Status:** Abandoned and Sealed
- **Type / commodity:** Underground / Coal (Bituminous)
- **Location:** Gunnison, CO
- **Operator:** Oxbow Mining, LLC
- **Controller:** Oxbow Carbon LLC
- **Public source rows linked:** 4,166
- **Source coverage:** 17 / 20
- **Generated:** 2026-10-17T06:17:15.228Z

## Current entity hierarchy

**Oxbow Carbon LLC (C10334) → Oxbow Mining, LLC (P23241) → Sanborn Creek Mine (0504452)**

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

## Controller and operator valid-time history

- **Oxbow Carbon LLC → Somerset Mining Company:** 1991-01-01 through 1995-09-14; derived from co-tenure at mine 0504452; source `msha-controller-operator-history`.
- **Oxbow Carbon LLC → Oxbow Mining, LLC:** 1995-09-15 through current/open; derived from co-tenure at mine 0504452; 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: 2026-10-17T05:35:58.500035+00:00.

## Assessment signals

1. **SAFETY — 0 since 2021:** Accidents and injuries 100 historical accident/injury rows; 1 coded fatalities and 2,649 lost days across the published record.
2. **COMPLIANCE — 0 since 2021:** Violations and penalties 1,289 violation rows across the full record; 316 carry an S&S flag and $526,579 appears in current assessed amounts.
3. **HEALTH — 923 samples:** Occupational health samples 851 coal dust; 57 coal quartz; 15 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 — 527K tons:** Quarterly production and employment 53K employee hours and 104 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 123 linked rows:** Contests, conferences and decisions 4 contested-violation rows, 39 civil-penalty docket/decision rows, and 80 conference records linked by issuance number.
6. **CONTRACTORS — 1 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 353 inspection events and 9K 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 75.202 — Protection from falls of roof, face and ribs.** (4 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-C/section-75.202
- **30 CFR 75.220 — Roof control plan.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-C/section-75.220
- **30 CFR 75.516-2 — Communication wires and cables; installation; insulation; support.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-F/section-75.516-2
- **30 CFR 75.1722 — Mechanical equipment guards.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-R/section-75.1722
- **30 CFR 75.362 — On-shift examination.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-D/section-75.362
- **30 CFR 75.807 — Installation of high-voltage transmission cables.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-I/section-75.807
- **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 75.512-2 — Frequency of examinations.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-F/section-75.512-2

## Source coverage

- **Accident, Injuries, and Illnesses:** 100 rows; 2000-01-16 through 2003-01-31; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2003-10-01 through 2003-10-01; source ID `msha-addresses`
- **Assessed Violations:** 1,244 rows; 2000-02-15 through 2003-05-15; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 39 rows; 2001-06-21 through 2004-06-07; source ID `msha-civil-penalty-dockets-decisions`
- **Coal Dust Samples:** 851 rows; 2000-01-13 through 2003-01-22; source ID `msha-coal-dust-samples`
- **Conferences:** 80 rows; 2000-08-16 through 2002-12-19; source ID `msha-conferences`
- **Contested Violations:** 4 rows; 2002-01-27 through 2002-01-29; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 94 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 19 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 2 rows; 1991-01-01 through 1995-09-15; source ID `msha-controller-operator-history`
- **Inspections:** 353 rows; 2000-01-03 through 2003-09-28; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 13 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`
- **Noise Samples:** 15 rows; 2001-08-23 through 2002-04-08; source ID `msha-noise-samples`
- **Quartz Samples — Coal:** 57 rows; 2000-02-04 through 2002-12-03; source ID `msha-quartz-samples`
- **Violations:** 1,289 rows; 2000-02-15 through 2003-05-15; 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/sanborn-creek-mine-0504452`
- JSON: `/api/v1/mines/sanborn-creek-mine-0504452`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/0504452/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/0504452/relationships`
- MCP resource: `mine://0504452/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`