# Pop-Corn

- **MSHA mine ID:** 2602236
- **Status:** Intermittent
- **Type / commodity:** Surface / Perlite
- **Location:** Churchill, NV
- **Operator:** U.S. Silica Company, LLC
- **Controller:** USS Holdings Inc
- **Public source rows linked:** 189
- **Source coverage:** 12 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**USS Holdings Inc (M11007) → U.S. Silica Company, LLC (L14417) → Pop-Corn (2602236)**

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

## Controller and operator valid-time history

- **Eagle-Picher Industries Inc → Eagle Picher Filtration & Minerals Inc:** 1993-08-01 through 2006-07-31; derived from co-tenure at mine 2602236; source `msha-controller-operator-history`.
- **Eagle-Picher Industries Inc → EP Minerals LLC:** 2006-08-01 through 2010-02-14; derived from co-tenure at mine 2602236; source `msha-controller-operator-history`.
- **EP Management Corporation → EP Minerals LLC:** 2010-02-15 through 2019-05-13; derived from co-tenure at mine 2602236; source `msha-controller-operator-history`.
- **USS Holdings Inc → U.S. Silica Company, LLC:** 2019-05-14 through current/open; derived from co-tenure at mine 2602236; 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: 2026-10-13T11:19:05.459773+00:00.

## Assessment signals

1. **SAFETY — 0 since 2021:** Accidents and injuries 1 historical accident/injury rows; 0 coded fatalities and 0 lost days across the published record.
2. **COMPLIANCE — 0 since 2021:** Violations and penalties 12 violation rows across the full record; 2 carry an S&S flag and $1,626 appears in current assessed amounts.
3. **HEALTH — 6 samples:** Occupational health samples 6 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 80 employee hours and 2 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 4 linked rows:** Contests, conferences and decisions 2 contested-violation rows, 2 civil-penalty docket/decision rows, and 0 conference records linked by issuance number.
6. **CONTRACTORS — 0 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 — 6 since 2021:** Inspections 17 inspection events and 179 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 56.1000 — Notification of commencement of operations and closing of mines.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-A/section-56.1000
- **30 CFR 50.30 — Preparation and submission of MSHA Form 7000-2—Quarterly Employment and Coal Production Report.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-I/part-50/subpart-D/section-50.30
- **30 CFR 47.54 — Availability of an MSDS.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-47/subpart-F/section-47.54
- **30 CFR 45.4 — Independent contractor register.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-G/part-45/section-45.4
- **30 CFR 56.15001 — First-aid materials.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-N/section-56.15001
- **30 CFR 48.31 — Hazard training.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-48/subpart-B/section-48.31
- **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 56.18020 — Working alone.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-Q/section-56.18020
- **30 CFR 56.20008 — Toilet facilities.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-S/section-56.20008

## Source coverage

- **Accident, Injuries, and Illnesses:** 1 rows; 2009-10-05 through 2009-10-05; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2023-10-02 through 2023-10-02; source ID `msha-addresses`
- **Assessed Violations:** 12 rows; 2009-10-06 through 2019-05-09; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 2 rows; 2010-09-30 through 2010-09-30; source ID `msha-civil-penalty-dockets-decisions`
- **Contested Violations:** 2 rows; 2009-10-06 through 2009-10-06; source ID `msha-contested-violations`
- **Controller and Operator History:** 4 rows; 1993-08-01 through 2019-05-14; source ID `msha-controller-operator-history`
- **Inspections:** 17 rows; 2009-10-05 through 2025-10-01; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 114 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 17 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:** 6 rows; 2015-01-28 through 2018-10-11; source ID `msha-personal-health-samples`
- **Violations:** 12 rows; 2009-10-06 through 2019-05-09; 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/pop-corn-2602236`
- JSON: `/api/v1/mines/pop-corn-2602236`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/2602236/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/2602236/relationships`
- MCP resource: `mine://2602236/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`