# Cheto Mine

- **MSHA mine ID:** 0200103
- **Status:** Temporarily Idled
- **Type / commodity:** Surface / Common Clays NEC
- **Location:** Apache, AZ
- **Operator:** US Silica Company
- **Controller:** USS Holdings Inc
- **Public source rows linked:** 1,542
- **Source coverage:** 15 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**USS Holdings Inc (M11007) → US Silica Company (L14417) → Cheto Mine (0200103)**

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

## Controller and operator valid-time history

- **U S Filter Corp → Filtrol Corp:** 1950-01-01 through 1981-03-31; derived from co-tenure at mine 0200103; source `msha-controller-operator-history`.
- **Ashland Inc → Filtrol Corp:** 1981-04-01 through 1981-12-14; derived from co-tenure at mine 0200103; source `msha-controller-operator-history`.
- **Kaiser Aluminum & Chemical Corp → Filtrol Corp:** 1981-12-15 through 1989-06-28; derived from co-tenure at mine 0200103; source `msha-controller-operator-history`.
- **Engelhard Corp → BASF Catalysts LLC:** 1989-06-29 through 2006-07-31; derived from co-tenure at mine 0200103; source `msha-controller-operator-history`.
- **BASF SE → BASF Catalysts LLC:** 2006-08-01 through 2010-12-31; derived from co-tenure at mine 0200103; source `msha-controller-operator-history`.
- **BASF SE → BASF Corporation:** 2011-01-01 through 2018-05-13; derived from co-tenure at mine 0200103; source `msha-controller-operator-history`.
- **EP Management Corporation → EP Engineered Clays:** 2018-05-14 through 2019-05-13; derived from co-tenure at mine 0200103; source `msha-controller-operator-history`.
- **USS Holdings Inc → US Silica Company:** 2019-05-14 through current/open; derived from co-tenure at mine 0200103; source `msha-controller-operator-history`.

- History rows: 8
- Typed edges: 23
- 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 — 1 since 2021:** Accidents and injuries 12 historical accident/injury rows; 0 coded fatalities and 9 lost days across the published record.
2. **COMPLIANCE — 0 since 2021:** Violations and penalties 53 violation rows across the full record; 4 carry an S&S flag and $5,474 appears in current assessed amounts.
3. **HEALTH — 17 samples:** Occupational health samples 17 personal. 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 0 employee hours and 0 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 13 linked rows:** Contests, conferences and decisions 4 contested-violation rows, 4 civil-penalty docket/decision rows, and 5 conference records linked by issuance number.
6. **CONTRACTORS — 6 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 36 inspection events and 529 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 56.12028 — Testing grounding systems.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12028
- **30 CFR 56.12002 — Controls and switches.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12002
- **30 CFR 50.30 — Preparation and submission of MSHA Form 7000-2—Quarterly Employment and Coal Production Report.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-I/part-50/subpart-D/section-50.30
- **30 CFR 56.12034 — Guarding around lights.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12034
- **30 CFR 56.14101 — Brakes.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14101
- **30 CFR 56.14100 — Safety defects; examination, correction and records.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14100
- **30 CFR 56.18002 — Examination of working places.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-Q/section-56.18002
- **30 CFR 56.11001 — Safe access.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-J/section-56.11001
- **30 CFR 56.20003 — Housekeeping.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-S/section-56.20003
- **30 CFR 56.12006 — Distribution boxes.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12006

## Source coverage

- **Accident, Injuries, and Illnesses:** 12 rows; 2006-08-04 through 2023-04-12; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2026-08-20 through 2026-08-20; source ID `msha-addresses`
- **Assessed Violations:** 53 rows; 2001-08-02 through 2019-05-09; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 4 rows; 2010-09-20 through 2015-01-15; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 5 rows; 2001-09-13 through 2006-06-21; source ID `msha-conferences`
- **Contested Violations:** 4 rows; 2009-12-08 through 2014-04-08; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 933 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 205 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 8 rows; 1950-01-01 through 2019-05-14; source ID `msha-controller-operator-history`
- **Inspections:** 36 rows; 2000-07-25 through 2020-10-06; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 172 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 38 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:** 17 rows; 2005-03-09 through 2019-04-30; source ID `msha-personal-health-samples`
- **Violations:** 53 rows; 2001-08-02 through 2019-05-09; 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/cheto-mine-0200103`
- JSON: `/api/v1/mines/cheto-mine-0200103`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/0200103/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/0200103/relationships`
- MCP resource: `mine://0200103/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`