# CORUNNA PLANT

- **MSHA mine ID:** 2000237
- **Status:** Abandoned
- **Type / commodity:** Surface / Oil Shale
- **Location:** Shiawassee, MI
- **Operator:** General Shale Brick, Inc.
- **Controller:** Wienerberger AG
- **Public source rows linked:** 468
- **Source coverage:** 12 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Wienerberger AG (M13043) → General Shale Brick, Inc. (0057717) → CORUNNA PLANT (2000237)**

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

## Controller and operator valid-time history

- **Jannock Ltd → U S Brick:** 1950-01-01 through 1999-05-13; derived from co-tenure at mine 2000237; source `msha-controller-operator-history`.
- **Hanson PLC → Michigan Brick-Hanson:** 1999-05-14 through 2006-12-06; derived from co-tenure at mine 2000237; source `msha-controller-operator-history`.
- **Hanson PLC → U S Brick:** 2002-04-16 through 1999-05-13; derived from co-tenure at mine 2000237; source `msha-controller-operator-history`.
- **Hanson PLC → Forterra Brick, LLC:** 2006-12-07 through 2007-08-22; derived from co-tenure at mine 2000237; source `msha-controller-operator-history`.
- **Jannock Ltd → Forterra Brick, LLC:** 2006-12-07 through 2002-04-15; derived from co-tenure at mine 2000237; source `msha-controller-operator-history`.
- **Heidelberg Materials AG → U S Brick:** 2007-08-23 through 1999-05-13; derived from co-tenure at mine 2000237; source `msha-controller-operator-history`.
- **Heidelberg Materials AG → Forterra Brick, LLC:** 2007-08-23 through 2015-03-12; derived from co-tenure at mine 2000237; source `msha-controller-operator-history`.
- **Lone Star Funds → U S Brick:** 2015-03-13 through 1999-05-13; derived from co-tenure at mine 2000237; source `msha-controller-operator-history`.
- **Lone Star Funds → Forterra Brick, LLC:** 2015-03-13 through 2017-03-31; derived from co-tenure at mine 2000237; source `msha-controller-operator-history`.
- **Lone Star Funds Inc et al → Meridian Brick LLC:** 2017-04-01 through 2021-10-17; derived from co-tenure at mine 2000237; source `msha-controller-operator-history`.
- **Boral Industries Inc et al → Meridian Brick LLC:** 2017-04-01 through 2021-10-17; derived from co-tenure at mine 2000237; source `msha-controller-operator-history`.
- **Wienerberger AG → Meridian Brick LLC:** 2021-10-18 through 2022-12-19; derived from co-tenure at mine 2000237; source `msha-controller-operator-history`.
- **Wienerberger AG → General Shale Brick, Inc.:** 2022-12-20 through current/open; derived from co-tenure at mine 2000237; source `msha-controller-operator-history`.

- History rows: 13
- Typed edges: 26
- Interval anomalies: 4
- 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 — 0 since 2021:** Accidents and injuries 4 historical accident/injury rows; 0 coded fatalities and 299 lost days across the published record.
2. **COMPLIANCE — 3 since 2021:** Violations and penalties 51 violation rows across the full record; 3 carry an S&S flag and $4,915 appears in current assessed amounts.
3. **HEALTH — 12 samples:** Occupational health samples 12 personal. 1 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 156 employee hours and 4 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 0 linked rows:** Contests, conferences and decisions 0 contested-violation rows, 0 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 62 inspection events and 715 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 56.18002 — 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 56.12032 — Inspection and cover plates.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12032
- **30 CFR 56.9300 — Berms or guardrails.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-H/section-56.9300
- **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 46.7 — New task training.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-46/section-46.7
- **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 46.4 — Training plan implementation.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-46/section-46.4
- **30 CFR 46.9 — Records of training.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-46/section-46.9
- **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 56.14207 — Parking procedures for unattended equipment.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14207
- **30 CFR 56.4201 — Inspection.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4201

## Source coverage

- **Accident, Injuries, and Illnesses:** 4 rows; 2000-08-30 through 2005-08-01; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2026-09-21 through 2026-09-21; source ID `msha-addresses`
- **Assessed Violations:** 51 rows; 2002-01-17 through 2022-12-15; source ID `msha-assessed-violations`
- **Contractor Employment and Production — Quarterly:** 4 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 3 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 13 rows; 1950-01-01 through 2022-12-20; source ID `msha-controller-operator-history`
- **Inspections:** 62 rows; 2000-01-10 through 2026-04-22; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 212 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 54 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:** 12 rows; 2003-03-07 through 2021-01-07; source ID `msha-personal-health-samples`
- **Violations:** 51 rows; 2002-01-17 through 2022-12-15; 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/corunna-plant-2000237`
- JSON: `/api/v1/mines/corunna-plant-2000237`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/2000237/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/2000237/relationships`
- MCP resource: `mine://2000237/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`