# Superior Plant

- **MSHA mine ID:** 2003275
- **Status:** Intermittent
- **Type / commodity:** Surface / Construction Sand and Gravel
- **Location:** Tuscola, MI
- **Operator:** Thumb Aggregate Sales LLC
- **Controller:** Charles E  Stringer
- **Public source rows linked:** 483
- **Source coverage:** 12 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Charles E  Stringer (0127521) → Thumb Aggregate Sales LLC (0146413) → Superior Plant (2003275)**

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

## Controller and operator valid-time history

- **Douglas L  Wilson → Thumb Aggregates Inc:** 2003-07-09 through 2016-07-23; derived from co-tenure at mine 2003275; source `msha-controller-operator-history`.
- **Charles E  Stringer → Thumb Aggregate Sales LLC:** 2016-07-24 through current/open; derived from co-tenure at mine 2003275; 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: 2026-10-13T11:19:05.459773+00:00.

## Assessment signals

1. **SAFETY — 1 since 2021:** Accidents and injuries 1 historical accident/injury rows; 0 coded fatalities and 343 lost days across the published record.
2. **COMPLIANCE — 34 since 2021:** Violations and penalties 114 violation rows across the full record; 33 carry an S&S flag and $23,781 appears in current assessed amounts.
3. **HEALTH — 4 samples:** Occupational health samples 4 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 345 employee hours and 1 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 20 linked rows:** Contests, conferences and decisions 10 contested-violation rows, 10 civil-penalty docket/decision rows, and 0 conference records linked by issuance number.
6. **CONTRACTORS — 0 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 — 8 since 2021:** Inspections 38 inspection events and 510 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 50.30 — Preparation and submission of MSHA Form 7000-2—Quarterly Employment and Coal Production Report.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-I/part-50/subpart-D/section-50.30
- **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 56.3131 — Pit or quarry wall perimeter.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-B/section-56.3131
- **30 CFR 56.14132 — Horns and backup alarms.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14132
- **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 56.11001 — 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 56.12013 — Splices and repairs of power cables.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12013
- **30 CFR 56.14112 — Construction and maintenance of guards.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14112
- **30 CFR 50.20 — Preparation and submission of MSHA Report Form 7000-1—Mine Accident, Injury, and Illness Report.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-I/part-50/subpart-C/section-50.20

## Source coverage

- **Accident, Injuries, and Illnesses:** 1 rows; 2023-02-13 through 2023-02-13; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2003-07-09 through 2003-07-09; source ID `msha-addresses`
- **Assessed Violations:** 113 rows; 2004-06-02 through 2026-03-11; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 10 rows; 2017-05-25 through 2017-05-25; source ID `msha-civil-penalty-dockets-decisions`
- **Contested Violations:** 10 rows; 2016-04-20 through 2016-05-04; source ID `msha-contested-violations`
- **Controller and Operator History:** 2 rows; 2003-07-09 through 2016-07-24; source ID `msha-controller-operator-history`
- **Inspections:** 38 rows; 2003-07-25 through 2026-09-10; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 156 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 33 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:** 4 rows; 2010-11-17 through 2026-09-10; source ID `msha-personal-health-samples`
- **Violations:** 114 rows; 2004-06-02 through 2026-03-11; 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/superior-plant-2003275`
- JSON: `/api/v1/mines/superior-plant-2003275`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/2003275/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/2003275/relationships`
- MCP resource: `mine://2003275/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`