# Dry Plant

- **MSHA mine ID:** 4703620
- **Status:** Abandoned
- **Type / commodity:** Facility / Sand, Industrial NEC
- **Location:** Barron, WI
- **Operator:** Superior Silica Sands LLC
- **Controller:** Iron Oak Energy Solutions LLC
- **Public source rows linked:** 303
- **Source coverage:** 13 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Iron Oak Energy Solutions LLC (0189021) → Superior Silica Sands LLC (0092166) → Dry Plant (4703620)**

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

## Controller and operator valid-time history

- **Insight Equity et al → Superior Silica Sands LLC:** 2011-08-18 through 2019-12-09; derived from co-tenure at mine 4703620; source `msha-controller-operator-history`.
- **Oak Hill Advisors et al → Superior Silica Sands LLC:** 2019-12-10 through 2025-12-15; derived from co-tenure at mine 4703620; source `msha-controller-operator-history`.
- **PIMCO et al → Superior Silica Sands LLC:** 2019-12-10 through 2025-12-15; derived from co-tenure at mine 4703620; source `msha-controller-operator-history`.
- **HPS Investment Partners et al → Superior Silica Sands LLC:** 2019-12-10 through 2025-12-15; derived from co-tenure at mine 4703620; source `msha-controller-operator-history`.
- **Iron Oak Energy Solutions LLC → Superior Silica Sands LLC:** 2025-12-16 through current/open; derived from co-tenure at mine 4703620; source `msha-controller-operator-history`.

- History rows: 5
- 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 — 0 since 2021:** Accidents and injuries 3 historical accident/injury rows; 0 coded fatalities and 78 lost days across the published record.
2. **COMPLIANCE — 0 since 2021:** Violations and penalties 44 violation rows across the full record; 8 carry an S&S flag and $5,959 appears in current assessed amounts.
3. **HEALTH — 22 samples:** Occupational health samples 22 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 0 employee hours and 0 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 6 linked rows:** Contests, conferences and decisions 0 contested-violation rows, 0 civil-penalty docket/decision rows, and 6 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 — 3 since 2021:** Inspections 26 inspection events and 337 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 56.20011 — Barricades and warning signs.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-S/section-56.20011
- **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 50.20 — Preparation and submission of MSHA Report Form 7000-1—Mine Accident, Injury, and Illness Report.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-I/part-50/subpart-C/section-50.20
- **30 CFR 56.9307 — Design, installation, and maintenance of railroads.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-H/section-56.9307
- **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 46.8 — Annual refresher training.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-46/section-46.8
- **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 56.16006 — Protection of gas cylinder valves.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-O/section-56.16006
- **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 56.14112 — 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 56.14107 — 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 56.4201 — 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:** 3 rows; 2017-03-13 through 2019-08-23; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2022-08-17 through 2022-08-17; source ID `msha-addresses`
- **Assessed Violations:** 44 rows; 2012-02-14 through 2019-11-06; source ID `msha-assessed-violations`
- **Conferences:** 6 rows; 2012-11-07 through 2015-07-31; source ID `msha-conferences`
- **Contractor Employment and Production — Quarterly:** 38 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 8 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 5 rows; 2011-08-18 through 2011-08-18; source ID `msha-controller-operator-history`
- **Inspections:** 26 rows; 2012-02-14 through 2022-08-17; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 85 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 20 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:** 22 rows; 2012-02-15 through 2017-12-12; source ID `msha-personal-health-samples`
- **Violations:** 44 rows; 2012-02-14 through 2019-11-06; 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/dry-plant-4703620`
- JSON: `/api/v1/mines/dry-plant-4703620`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/4703620/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/4703620/relationships`
- MCP resource: `mine://4703620/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`