# Weakley County Operations

- **MSHA mine ID:** 4000188
- **Status:** Active
- **Type / commodity:** Surface / Common Clays NEC
- **Location:** Weakley, TN
- **Operator:** Gleason Clay Company LLC
- **Controller:** Joseph L  Powell
- **Public source rows linked:** 693
- **Source coverage:** 14 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Joseph L  Powell (0115143) → Gleason Clay Company LLC (0135253) → Weakley County Operations (4000188)**

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

## Controller and operator valid-time history

- **Cyprus Mines Corp → Cyprus Industrial Minerals Company:** 1950-01-01 through 1980-09-21; derived from co-tenure at mine 4000188; source `msha-controller-operator-history`.
- **Cyprus Amax Minerals Company → Cyprus Industrial Minerals Company:** 1980-09-22 through 1989-03-31; derived from co-tenure at mine 4000188; source `msha-controller-operator-history`.
- **Watts Blake Bearne & Company Plc → United Clays Inc:** 1989-04-01 through 1999-09-30; derived from co-tenure at mine 4000188; source `msha-controller-operator-history`.
- **S C R-Sibelco Nv et al → Unimin Corp:** 1999-10-01 through 2014-08-31; derived from co-tenure at mine 4000188; source `msha-controller-operator-history`.
- **Joseph L  Powell → Gleason Clay Company LLC:** 2014-09-01 through current/open; derived from co-tenure at mine 4000188; source `msha-controller-operator-history`.
- **Covia Holdings LLC → Unimin Corp:** 2021-01-01 through 2014-08-31; derived from co-tenure at mine 4000188; source `msha-controller-operator-history`.

- History rows: 6
- Typed edges: 17
- Interval anomalies: 1
- 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 — 2 since 2021:** Accidents and injuries 53 historical accident/injury rows; 0 coded fatalities and 88 lost days across the published record.
2. **COMPLIANCE — 15 since 2021:** Violations and penalties 75 violation rows across the full record; 7 carry an S&S flag and $8,426 appears in current assessed amounts.
3. **HEALTH — 33 samples:** Occupational health samples 33 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 24K employee hours and 42 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 13 linked rows:** Contests, conferences and decisions 6 contested-violation rows, 6 civil-penalty docket/decision rows, and 1 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 — 12 since 2021:** Inspections 76 inspection events and 1K 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 56.4101 — 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 46.11 — Site-specific hazard awareness training.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-46/section-46.11
- **30 CFR 56.12001 — Circuit overload protection.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12001
- **30 CFR 56.15002 — Hard hats.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-N/section-56.15002
- **30 CFR 56.17001 — Illumination of surface working areas.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-P/section-56.17001
- **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 56.16005 — Securing gas cylinders.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-O/section-56.16005
- **30 CFR 56.12005 — Protection of power conductors from mobile equipment.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12005
- **30 CFR 56.12008 — Insulation and fittings for power wires and cables.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12008
- **30 CFR 56.12025 — Grounding circuit enclosures.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12025
- **30 CFR 56.12007 — Junction box connection procedures.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12007

## Source coverage

- **Accident, Injuries, and Illnesses:** 53 rows; 2000-02-16 through 2022-03-26; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 1979-04-06 through 1979-04-06; source ID `msha-addresses`
- **Assessed Violations:** 75 rows; 2000-02-23 through 2025-07-15; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 6 rows; 2005-09-19 through 2011-09-07; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 1 rows; 2005-03-16 through 2005-03-16; source ID `msha-conferences`
- **Contested Violations:** 6 rows; 2005-02-14 through 2010-02-16; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 9 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Controller and Operator History:** 6 rows; 1950-01-01 through 2014-09-01; source ID `msha-controller-operator-history`
- **Inspections:** 76 rows; 2000-02-22 through 2026-04-07; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 279 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 72 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:** 33 rows; 2001-01-04 through 2026-04-08; source ID `msha-personal-health-samples`
- **Violations:** 75 rows; 2000-02-23 through 2025-07-15; 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/weakley-county-operations-4000188`
- JSON: `/api/v1/mines/weakley-county-operations-4000188`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/4000188/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/4000188/relationships`
- MCP resource: `mine://4000188/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`