# Mauricetown Plant

- **MSHA mine ID:** 2800526
- **Status:** Active
- **Type / commodity:** Surface / Sand, Industrial NEC
- **Location:** Cumberland, NJ
- **Operator:** U.S. Silica Company, LLC
- **Controller:** USS Holdings Inc
- **Public source rows linked:** 820
- **Source coverage:** 16 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**USS Holdings Inc (M11007) → U.S. Silica Company, LLC (L14417) → Mauricetown Plant (2800526)**

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

## Controller and operator valid-time history

- **Energy & Minerals Inc → Morie Company Inc:** 1950-01-01 through 1996-12-02; derived from co-tenure at mine 2800526; source `msha-controller-operator-history`.
- **S C R-Sibelco Nv et al → Unimin Corp:** 1996-12-03 through 1999-04-30; derived from co-tenure at mine 2800526; source `msha-controller-operator-history`.
- **USS Holdings Inc → Better Materials Corp:** 1999-05-01 through 2002-08-31; derived from co-tenure at mine 2800526; source `msha-controller-operator-history`.
- **USS Holdings Inc → U.S. Silica Company, LLC:** 2002-09-01 through current/open; derived from co-tenure at mine 2800526; source `msha-controller-operator-history`.
- **Hanson PLC → Better Materials Corp:** 2003-07-19 through 2002-08-31; derived from co-tenure at mine 2800526; source `msha-controller-operator-history`.
- **Heidelberg Materials AG → Better Materials Corp:** 2007-08-23 through 2002-08-31; derived from co-tenure at mine 2800526; source `msha-controller-operator-history`.
- **Covia Holdings LLC → Unimin Corp:** 2021-01-01 through 1999-04-30; derived from co-tenure at mine 2800526; source `msha-controller-operator-history`.

- History rows: 7
- Typed edges: 18
- Interval anomalies: 3
- 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 13 historical accident/injury rows; 0 coded fatalities and 39 lost days across the published record.
2. **COMPLIANCE — 24 since 2021:** Violations and penalties 104 violation rows across the full record; 11 carry an S&S flag and $12,318 appears in current assessed amounts.
3. **HEALTH — 84 samples:** Occupational health samples 82 personal; 2 area. 9 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 16K employee hours and 33 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 25 linked rows:** Contests, conferences and decisions 12 contested-violation rows, 12 civil-penalty docket/decision rows, and 1 conference records linked by issuance number.
6. **CONTRACTORS — 2 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 — 15 since 2021:** Inspections 72 inspection events and 2K 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.** (3 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14100
- **30 CFR 56.14112 — Construction and maintenance of guards.** (3 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14112
- **30 CFR 56.14205 — Machinery, equipment, and tools.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14205
- **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 56.12008 — 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 56.12028 — Testing grounding systems.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12028
- **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 56.9300 — 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

## Source coverage

- **Accident, Injuries, and Illnesses:** 13 rows; 2000-05-15 through 2026-01-28; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2009-01-23 through 2009-01-23; source ID `msha-addresses`
- **Metal and Nonmetal Area Samples:** 2 rows; 2017-03-07 through 2017-03-07; source ID `msha-area-samples`
- **Assessed Violations:** 100 rows; 2000-03-30 through 2025-12-09; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 12 rows; 2009-04-02 through 2021-02-12; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 1 rows; 2004-12-21 through 2004-12-21; source ID `msha-conferences`
- **Contested Violations:** 12 rows; 2008-01-10 through 2020-08-26; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 78 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 21 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 7 rows; 1950-01-01 through 2002-09-01; source ID `msha-controller-operator-history`
- **Inspections:** 72 rows; 2000-03-29 through 2026-09-30; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 258 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 56 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:** 82 rows; 2001-02-20 through 2024-12-12; source ID `msha-personal-health-samples`
- **Violations:** 104 rows; 2000-03-30 through 2026-09-09; 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/mauricetown-plant-2800526`
- JSON: `/api/v1/mines/mauricetown-plant-2800526`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/2800526/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/2800526/relationships`
- MCP resource: `mine://2800526/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`