# Tata Chemicals Mine

- **MSHA mine ID:** 4800155
- **Status:** Active
- **Type / commodity:** Underground / Trona
- **Location:** Sweetwater, WY
- **Operator:** Tata Chemicals Soda Ash Partners LLC
- **Controller:** Tata Chemicals Ltd
- **Public source rows linked:** 15,787
- **Source coverage:** 16 / 20
- **Generated:** 2026-10-17T06:17:15.228Z

## Current entity hierarchy

**Tata Chemicals Ltd (0081153) → Tata Chemicals Soda Ash Partners LLC (L11009) → Tata Chemicals Mine (4800155)**

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

## Controller and operator valid-time history

- **Allied-Signal Inc → General Chemical Corp:** 1950-01-01 through 1989-06-30; derived from co-tenure at mine 4800155; source `msha-controller-operator-history`.
- **General Chemical  et al → Tata Chemicals Soda Ash Partners LLC:** 1989-07-01 through 2008-03-31; derived from co-tenure at mine 4800155; source `msha-controller-operator-history`.
- **Andover Group  et al → Tata Chemicals Soda Ash Partners LLC:** 1989-07-01 through 2008-03-31; derived from co-tenure at mine 4800155; source `msha-controller-operator-history`.
- **Tata Chemicals Ltd → Tata Chemicals Soda Ash Partners LLC:** 2008-04-01 through current/open; derived from co-tenure at mine 4800155; source `msha-controller-operator-history`.

- History rows: 4
- Typed edges: 9
- 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 — 74 since 2021:** Accidents and injuries 671 historical accident/injury rows; 1 coded fatalities and 11,074 lost days across the published record.
2. **COMPLIANCE — 884 since 2021:** Violations and penalties 2,529 violation rows across the full record; 379 carry an S&S flag and $1,131,486 appears in current assessed amounts.
3. **HEALTH — 258 samples:** Occupational health samples 254 personal; 4 area. 25 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 121K employee hours and 260 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 866 linked rows:** Contests, conferences and decisions 410 contested-violation rows, 404 civil-penalty docket/decision rows, and 52 conference records linked by issuance number.
6. **CONTRACTORS — 40 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 — 473 since 2021:** Inspections 2,041 inspection events and 32K 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 57.20003 — Housekeeping.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-S/section-57.20003
- **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 62.130 — Permissible exposure level.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-M/part-62/section-62.130
- **30 CFR 57.4203 — Extinguisher recharging or replacement.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-C/section-57.4203
- **30 CFR 57.12008 — Insulation and fittings for power wires and cables.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-K/section-57.12008
- **30 CFR 57.4201 — Inspection.** (3 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-C/section-57.4201
- **30 CFR 57.12032 — Inspection and cover plates.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-K/section-57.12032
- **30 CFR 57.14207 — Parking procedures for unattended equipment.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-M/section-57.14207
- **30 CFR 57.12004 — Electrical conductors.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-K/section-57.12004

## Source coverage

- **Accident, Injuries, and Illnesses:** 671 rows; 2000-01-20 through 2026-07-29; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 1982-02-18 through 1982-02-18; source ID `msha-addresses`
- **Metal and Nonmetal Area Samples:** 4 rows; 2014-11-25 through 2025-12-17; source ID `msha-area-samples`
- **Assessed Violations:** 2,425 rows; 2000-03-09 through 2026-08-21; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 404 rows; 2010-01-28 through 2026-09-17; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 52 rows; 2000-08-31 through 2026-04-17; source ID `msha-conferences`
- **Contested Violations:** 410 rows; 2008-09-09 through 2026-05-27; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 5,684 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 1,202 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 4 rows; 1950-01-01 through 1989-07-01; source ID `msha-controller-operator-history`
- **Inspections:** 2,041 rows; 2000-01-03 through 2026-10-07; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 24 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 81 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:** 254 rows; 2001-03-21 through 2026-09-01; source ID `msha-personal-health-samples`
- **Violations:** 2,529 rows; 2000-03-09 through 2026-10-15; 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/tata-chemicals-mine-4800155`
- JSON: `/api/v1/mines/tata-chemicals-mine-4800155`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/4800155/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/4800155/relationships`
- MCP resource: `mine://4800155/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`