# HENDERSON OPERATIONS

- **MSHA mine ID:** 0500790
- **Status:** Active
- **Type / commodity:** Underground / Molybdenum Ore
- **Location:** Clear Creek, CO
- **Operator:** Climax Molybdenum Company
- **Controller:** Freeport-McMoRan Inc
- **Public source rows linked:** 18,265
- **Source coverage:** 16 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Freeport-McMoRan Inc (0067299) → Climax Molybdenum Company (L17295) → HENDERSON OPERATIONS (0500790)**

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

## Controller and operator valid-time history

- **Cyprus Amax Minerals Company → Climax Molybdenum Company:** 1950-01-01 through 1999-10-21; derived from co-tenure at mine 0500790; source `msha-controller-operator-history`.
- **Phelps Dodge Corp → Climax Molybdenum Company:** 1999-10-22 through 2007-03-18; derived from co-tenure at mine 0500790; source `msha-controller-operator-history`.
- **Freeport-McMoRan Inc → Climax Molybdenum Company:** 2007-03-19 through current/open; derived from co-tenure at mine 0500790; source `msha-controller-operator-history`.

- History rows: 3
- Typed edges: 8
- 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 — 38 since 2021:** Accidents and injuries 314 historical accident/injury rows; 0 coded fatalities and 6,142 lost days across the published record.
2. **COMPLIANCE — 561 since 2021:** Violations and penalties 2,063 violation rows across the full record; 336 carry an S&S flag and $804,733 appears in current assessed amounts.
3. **HEALTH — 1K samples:** Occupational health samples 1,147 personal; 51 area. 35 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 213K employee hours and 395 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 335 linked rows:** Contests, conferences and decisions 128 contested-violation rows, 130 civil-penalty docket/decision rows, and 77 conference records linked by issuance number.
6. **CONTRACTORS — 65 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 — 79 since 2021:** Inspections 277 inspection events and 29K 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 57.14100 — Safety defects; examination, correction and records.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-M/section-57.14100
- **30 CFR 57.4160 — Underground electric substations and liquid storage facilities.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-C/section-57.4160
- **30 CFR 57.9300 — Berms or guardrails.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-H/section-57.9300
- **30 CFR 57.20003 — Housekeeping.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-S/section-57.20003
- **30 CFR 57.12028 — Testing grounding systems.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-K/section-57.12028
- **30 CFR 57.4601 — Oxygen cylinder storage.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-C/section-57.4601
- **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 57.4400 — Use restrictions.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-C/section-57.4400
- **30 CFR 57.18002 — Examination of working places.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-Q/section-57.18002
- **30 CFR 57.12002 — Controls and switches.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-K/section-57.12002

## Source coverage

- **Accident, Injuries, and Illnesses:** 314 rows; 2000-01-05 through 2026-09-09; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 1973-02-15 through 1973-02-15; source ID `msha-addresses`
- **Metal and Nonmetal Area Samples:** 51 rows; 2010-04-14 through 2026-06-02; source ID `msha-area-samples`
- **Assessed Violations:** 2,036 rows; 2000-03-14 through 2026-08-05; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 130 rows; 2003-11-19 through 2026-05-12; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 77 rows; 2000-04-13 through 2025-11-20; source ID `msha-conferences`
- **Contested Violations:** 128 rows; 2005-02-05 through 2025-08-28; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 9,522 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 1,983 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 3 rows; 1950-01-01 through 1999-10-22; source ID `msha-controller-operator-history`
- **Inspections:** 277 rows; 2000-03-03 through 2026-09-10; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 424 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 108 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:** 1,147 rows; 2001-06-05 through 2026-06-02; source ID `msha-personal-health-samples`
- **Violations:** 2,063 rows; 2000-03-14 through 2026-08-05; 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/henderson-operations-0500790`
- JSON: `/api/v1/mines/henderson-operations-0500790`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/0500790/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/0500790/relationships`
- MCP resource: `mine://0500790/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`