# Portage Plant

- **MSHA mine ID:** 4700749
- **Status:** Active
- **Type / commodity:** Surface / Sand, Industrial NEC
- **Location:** Columbia, WI
- **Operator:** Covia Solutions LLC
- **Controller:** Covia Holdings LLC
- **Public source rows linked:** 1,923
- **Source coverage:** 15 / 20
- **Generated:** 2026-10-17T06:17:15.228Z

## Current entity hierarchy

**Covia Holdings LLC (0159743) → Covia Solutions LLC (0197714) → Portage Plant (4700749)**

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

## Controller and operator valid-time history

- **Martin Marietta Materials Inc → Martin Marietta Aggregates:** 1950-01-01 through 1983-10-17; derived from co-tenure at mine 4700749; source `msha-controller-operator-history`.
- **S C R-Sibelco Nv et al → Covia Solutions Inc.:** 1983-10-18 through 2020-12-31; derived from co-tenure at mine 4700749; source `msha-controller-operator-history`.
- **Covia Holdings LLC → Covia Solutions Inc.:** 2021-01-01 through 2024-07-31; derived from co-tenure at mine 4700749; source `msha-controller-operator-history`.
- **Covia Holdings LLC → Covia Solutions LLC:** 2024-08-01 through current/open; derived from co-tenure at mine 4700749; source `msha-controller-operator-history`.

- History rows: 4
- Typed edges: 11
- 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: 2026-10-17T05:35:58.500035+00:00.

## Assessment signals

1. **SAFETY — 6 since 2021:** Accidents and injuries 82 historical accident/injury rows; 0 coded fatalities and 752 lost days across the published record.
2. **COMPLIANCE — 49 since 2021:** Violations and penalties 233 violation rows across the full record; 37 carry an S&S flag and $40,711 appears in current assessed amounts.
3. **HEALTH — 105 samples:** Occupational health samples 105 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 19K employee hours and 36 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 22 linked rows:** Contests, conferences and decisions 4 contested-violation rows, 7 civil-penalty docket/decision rows, and 11 conference records linked by issuance number.
6. **CONTRACTORS — 10 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 — 20 since 2021:** Inspections 96 inspection events and 3K 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 56.4102 — Spillage and leakage.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4102
- **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 56.14107 — 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 56.14112 — 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 56.14130 — Roll-over protective structures (ROPS) and seat belts.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14130
- **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 56.12018 — Identification of power switches.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12018
- **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 56.12023 — Guarding electrical connections and resistor grids.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12023

## Source coverage

- **Accident, Injuries, and Illnesses:** 82 rows; 2000-01-17 through 2024-02-27; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 1976-07-04 through 1976-07-04; source ID `msha-addresses`
- **Assessed Violations:** 232 rows; 2000-03-01 through 2026-04-14; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 7 rows; 2000-08-04 through 2018-02-27; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 11 rows; 2000-09-08 through 2016-02-22; source ID `msha-conferences`
- **Contested Violations:** 4 rows; 2008-12-16 through 2017-06-06; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 843 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 202 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 4 rows; 1950-01-01 through 2024-08-01; source ID `msha-controller-operator-history`
- **Inspections:** 96 rows; 2000-03-01 through 2026-04-13; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 33 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 69 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:** 105 rows; 2001-12-04 through 2026-02-12; source ID `msha-personal-health-samples`
- **Violations:** 233 rows; 2000-03-01 through 2026-04-14; 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/portage-plant-4700749`
- JSON: `/api/v1/mines/portage-plant-4700749`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/4700749/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/4700749/relationships`
- MCP resource: `mine://4700749/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`