# Thompson Mine

- **MSHA mine ID:** 3301944
- **Status:** Active
- **Type / commodity:** Surface / Ground Silica
- **Location:** Geauga, OH
- **Operator:** Great Sand LLC
- **Controller:** Covia Holdings LLC
- **Public source rows linked:** 2,142
- **Source coverage:** 15 / 20
- **Generated:** 2026-10-17T06:17:15.228Z

## Current entity hierarchy

**Covia Holdings LLC (0159743) → Great Sand LLC (0197813) → Thompson Mine (3301944)**

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

## Controller and operator valid-time history

- **Robert C  Sidley et al → R W Sidley Inc:** 1950-01-01 through 2022-11-24; derived from co-tenure at mine 3301944; source `msha-controller-operator-history`.
- **Robert  Buescher → R W Sidley Inc:** 2022-11-25 through 2024-05-19; derived from co-tenure at mine 3301944; source `msha-controller-operator-history`.
- **Covia Holdings LLC → Great Sand LLC:** 2024-05-20 through current/open; derived from co-tenure at mine 3301944; 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: 2026-10-17T05:35:58.500035+00:00.

## Assessment signals

1. **SAFETY — 7 since 2021:** Accidents and injuries 28 historical accident/injury rows; 0 coded fatalities and 229 lost days across the published record.
2. **COMPLIANCE — 195 since 2021:** Violations and penalties 486 violation rows across the full record; 108 carry an S&S flag and $169,671 appears in current assessed amounts.
3. **HEALTH — 120 samples:** Occupational health samples 120 personal. 17 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 13K employee hours and 28 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 179 linked rows:** Contests, conferences and decisions 88 contested-violation rows, 88 civil-penalty docket/decision rows, and 3 conference records linked by issuance number.
6. **CONTRACTORS — 5 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 — 32 since 2021:** Inspections 119 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 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 56.12018 — Identification of power switches.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12018
- **30 CFR 56.4101 — Warning signs.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4101
- **30 CFR 56.12030 — Correction of dangerous conditions.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12030
- **30 CFR 56.9100 — Traffic control.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-H/section-56.9100
- **30 CFR 56.12032 — Inspection and cover plates.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12032
- **30 CFR 56.14132 — Horns and backup alarms.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14132
- **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 56.14107 — Moving machine parts.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14107
- **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.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12006

## Source coverage

- **Accident, Injuries, and Illnesses:** 28 rows; 2000-04-03 through 2026-06-13; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 1981-06-10 through 1981-06-10; source ID `msha-addresses`
- **Assessed Violations:** 482 rows; 2000-12-19 through 2026-04-03; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 88 rows; 2022-03-31 through 2024-12-09; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 3 rows; 2021-04-26 through 2021-04-26; source ID `msha-conferences`
- **Contested Violations:** 88 rows; 2021-05-11 through 2023-11-14; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 493 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 113 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 3 rows; 1950-01-01 through 2024-05-20; source ID `msha-controller-operator-history`
- **Inspections:** 119 rows; 2000-03-20 through 2026-06-01; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 36 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:** 120 rows; 2002-01-09 through 2026-06-02; source ID `msha-personal-health-samples`
- **Violations:** 486 rows; 2000-12-19 through 2026-04-03; 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/thompson-mine-3301944`
- JSON: `/api/v1/mines/thompson-mine-3301944`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/3301944/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/3301944/relationships`
- MCP resource: `mine://3301944/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`