# Tolsa Wyoming Bentonite Plant

- **MSHA mine ID:** 4801751
- **Status:** Temporarily Idled
- **Type / commodity:** Facility / Bentonite
- **Location:** Natrona, WY
- **Operator:** Tolsa Wyoming Bentonite
- **Controller:** Tolsa S A
- **Public source rows linked:** 648
- **Source coverage:** 14 / 20
- **Generated:** 2026-10-17T06:17:15.228Z

## Current entity hierarchy

**Tolsa S A (0117261) → Tolsa Wyoming Bentonite (0137814) → Tolsa Wyoming Bentonite Plant (4801751)**

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

## Controller and operator valid-time history

- **Robert  Nolind et al → US Bentonite Processing, Inc:** 2010-10-14 through 2015-02-19; derived from co-tenure at mine 4801751; source `msha-controller-operator-history`.
- **Tolsa S A → Tolsa Wyoming Bentonite:** 2015-02-20 through current/open; derived from co-tenure at mine 4801751; 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 — 1 since 2021:** Accidents and injuries 23 historical accident/injury rows; 0 coded fatalities and 630 lost days across the published record.
2. **COMPLIANCE — 98 since 2021:** Violations and penalties 153 violation rows across the full record; 53 carry an S&S flag and $92,387 appears in current assessed amounts.
3. **HEALTH — 31 samples:** Occupational health samples 24 personal; 7 area. 9 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 — No published quarter:** Quarterly production and employment The source remains registered, but no mine-keyed quarterly production row was published.
5. **LEGAL — 52 linked rows:** Contests, conferences and decisions 26 contested-violation rows, 26 civil-penalty docket/decision rows, and 0 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 — 13 since 2021:** Inspections 53 inspection events and 895 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 56.12018 — Identification of power switches.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12018
- **30 CFR 56.12020 — Protection of persons at switchgear.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12020
- **30 CFR 56.12032 — Inspection and cover plates.** (3 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12032
- **30 CFR 56.4201 — Inspection.** (3 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4201
- **30 CFR 56.14205 — Machinery, equipment, and tools.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14205
- **30 CFR 56.12004 — Electrical conductors.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12004
- **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

## Source coverage

- **Accident, Injuries, and Illnesses:** 23 rows; 2011-09-28 through 2024-03-18; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2025-10-02 through 2025-10-02; source ID `msha-addresses`
- **Metal and Nonmetal Area Samples:** 7 rows; 2013-08-20 through 2013-08-20; source ID `msha-area-samples`
- **Assessed Violations:** 151 rows; 2011-02-01 through 2025-07-17; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 26 rows; 2013-09-04 through 2025-06-11; source ID `msha-civil-penalty-dockets-decisions`
- **Contested Violations:** 26 rows; 2013-01-03 through 2024-08-14; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 137 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 15 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 2 rows; 2010-10-14 through 2015-02-20; source ID `msha-controller-operator-history`
- **Inspections:** 53 rows; 2011-01-31 through 2026-05-04; source ID `msha-inspections`
- **Mine Employment and Production — Yearly:** 29 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:** 24 rows; 2012-07-11 through 2022-10-14; source ID `msha-personal-health-samples`
- **Violations:** 153 rows; 2011-02-01 through 2025-07-17; 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/tolsa-wyoming-bentonite-plant-4801751`
- JSON: `/api/v1/mines/tolsa-wyoming-bentonite-plant-4801751`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/4801751/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/4801751/relationships`
- MCP resource: `mine://4801751/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`