# Berkeley Plant

- **MSHA mine ID:** 4602805
- **Status:** Active
- **Type / commodity:** Surface / Ground Silica
- **Location:** Morgan, WV
- **Operator:** U.S. Silica Company, LLC
- **Controller:** USS Holdings Inc
- **Public source rows linked:** 3,708
- **Source coverage:** 15 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**USS Holdings Inc (M11007) → U.S. Silica Company, LLC (L14417) → Berkeley Plant (4602805)**

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

## Controller and operator valid-time history

- **ITT Corp → Pennsylvania Glass Sand Corp:** 1950-01-01 through 1986-05-14; derived from co-tenure at mine 4602805; source `msha-controller-operator-history`.
- **Rio Tinto Group → U S Silica Company:** 1986-05-15 through 1996-03-08; derived from co-tenure at mine 4602805; source `msha-controller-operator-history`.
- **USS Holdings Inc → U.S. Silica Company, LLC:** 1996-03-09 through current/open; derived from co-tenure at mine 4602805; source `msha-controller-operator-history`.

- History rows: 3
- Typed edges: 9
- 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 — 3 since 2021:** Accidents and injuries 71 historical accident/injury rows; 0 coded fatalities and 1,122 lost days across the published record.
2. **COMPLIANCE — 22 since 2021:** Violations and penalties 382 violation rows across the full record; 56 carry an S&S flag and $89,725 appears in current assessed amounts.
3. **HEALTH — 165 samples:** Occupational health samples 165 personal. 25 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 30K employee hours and 54 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 289 linked rows:** Contests, conferences and decisions 123 contested-violation rows, 116 civil-penalty docket/decision rows, and 50 conference records linked by issuance number.
6. **CONTRACTORS — 19 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 — 31 since 2021:** Inspections 135 inspection events and 5K 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 56.14112 — 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 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 56.20003 — 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 56.12002 — Controls and switches.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12002
- **30 CFR 56.14107 — Moving machine parts.** (3 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14107
- **30 CFR 56.5001 — Exposure limits for airborne contaminants.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-D/section-56.5001
- **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 56.14116 — Hand-held power tools.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14116
- **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 56.11002 — Handrails and toeboards.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-J/section-56.11002

## Source coverage

- **Accident, Injuries, and Illnesses:** 71 rows; 2000-02-25 through 2025-10-21; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2012-02-22 through 2012-02-22; source ID `msha-addresses`
- **Assessed Violations:** 378 rows; 2000-04-19 through 2026-07-20; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 116 rows; 2004-06-28 through 2025-03-10; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 50 rows; 2002-07-30 through 2015-10-13; source ID `msha-conferences`
- **Contested Violations:** 123 rows; 2004-05-14 through 2024-08-28; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 1,537 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 347 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 3 rows; 1950-01-01 through 1996-03-09; source ID `msha-controller-operator-history`
- **Inspections:** 135 rows; 2000-04-19 through 2026-09-30; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 318 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:** 165 rows; 2001-01-10 through 2026-07-22; source ID `msha-personal-health-samples`
- **Violations:** 382 rows; 2000-04-19 through 2026-07-20; 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/berkeley-plant-4602805`
- JSON: `/api/v1/mines/berkeley-plant-4602805`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/4602805/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/4602805/relationships`
- MCP resource: `mine://4602805/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`