# Hermosa Mine

- **MSHA mine ID:** 0203398
- **Status:** NonProducing
- **Type / commodity:** Underground / Lead-Zinc Ore
- **Location:** Santa Cruz, AZ
- **Operator:** South32 Hermosa Inc.
- **Controller:** South32
- **Public source rows linked:** 4,437
- **Source coverage:** 15 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**South32 (0142781) → South32 Hermosa Inc. (0156953) → Hermosa Mine (0203398)**

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

## Controller and operator valid-time history

- **Arizona Mining Inc → South32 Hermosa Inc.:** 2018-03-28 through 2018-08-09; derived from co-tenure at mine 0203398; source `msha-controller-operator-history`.
- **South32 → South32 Hermosa Inc.:** 2018-08-10 through current/open; derived from co-tenure at mine 0203398; source `msha-controller-operator-history`.

- History rows: 2
- Typed edges: 5
- 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 — 39 since 2021:** Accidents and injuries 46 historical accident/injury rows; 0 coded fatalities and 510 lost days across the published record.
2. **COMPLIANCE — 131 since 2021:** Violations and penalties 193 violation rows across the full record; 26 carry an S&S flag and $93,799 appears in current assessed amounts.
3. **HEALTH — 27 samples:** Occupational health samples 27 personal. 2 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 130K employee hours and 174 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 61 linked rows:** Contests, conferences and decisions 22 contested-violation rows, 22 civil-penalty docket/decision rows, and 17 conference records linked by issuance number.
6. **CONTRACTORS — 21 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 — 44 since 2021:** Inspections 64 inspection events and 3K 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 57.19120 — Procedures for inspection, testing, and maintenance.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-R/section-57.19120
- **30 CFR 57.23003 — Requirements for written safety program.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-U/section-57.23003
- **30 CFR 57.23002 — Written safety program.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-U/section-57.23002
- **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 57.6102 — Explosive material storage practices.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-E/section-57.6102
- **30 CFR 57.16005 — Securing gas cylinders.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-O/section-57.16005
- **30 CFR 56.14100 — Safety defects; examination, correction and records.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14100
- **30 CFR 56.14207 — Parking procedures for unattended equipment.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14207
- **30 CFR 56.4201 — Inspection.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4201
- **30 CFR 56.12004 — Electrical conductors.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12004
- **30 CFR 56.4203 — Extinguisher recharging or replacement.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4203

## Source coverage

- **Accident, Injuries, and Illnesses:** 46 rows; 2018-08-16 through 2026-09-17; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2021-01-27 through 2021-01-27; source ID `msha-addresses`
- **Assessed Violations:** 189 rows; 2018-04-18 through 2026-08-19; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 22 rows; 2018-08-28 through 2026-03-30; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 17 rows; 2018-05-30 through 2025-05-12; source ID `msha-conferences`
- **Contested Violations:** 22 rows; 2018-04-18 through 2025-09-02; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 3,122 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 659 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 2 rows; 2018-03-28 through 2018-03-28; source ID `msha-controller-operator-history`
- **Inspections:** 64 rows; 2018-04-18 through 2026-10-05; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 58 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 14 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:** 27 rows; 2018-12-12 through 2025-11-05; source ID `msha-personal-health-samples`
- **Violations:** 193 rows; 2018-04-18 through 2026-08-19; 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/hermosa-mine-0203398`
- JSON: `/api/v1/mines/hermosa-mine-0203398`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/0203398/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/0203398/relationships`
- MCP resource: `mine://0203398/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`