# Portable Crusher #2 (P-450)

- **MSHA mine ID:** 4201881
- **Status:** Active
- **Type / commodity:** Surface / Construction Sand and Gravel
- **Location:** Humboldt, NV
- **Operator:** Bolinder Resources LLC
- **Controller:** Bolinder Resources ESOP and Trust
- **Public source rows linked:** 152
- **Source coverage:** 14 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Bolinder Resources ESOP and Trust (0192661) → Bolinder Resources LLC (0102846) → Portable Crusher #2 (P-450) (4201881)**

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

## Controller and operator valid-time history

- **Garry L  Bolinder → Bolinder Companies Inc:** 1984-05-01 through 2020-08-18; derived from co-tenure at mine 4201881; source `msha-controller-operator-history`.
- **Stacey  Bolinder → Bolinder Resources LLC:** 2020-08-19 through 2012-12-29; derived from co-tenure at mine 4201881; source `msha-controller-operator-history`.
- **Garry L  Bolinder et al → Bolinder Resources LLC:** 2020-08-19 through 2024-06-03; derived from co-tenure at mine 4201881; source `msha-controller-operator-history`.
- **Stacey P  Bolinder et al → Bolinder Resources LLC:** 2020-08-19 through 2024-06-03; derived from co-tenure at mine 4201881; source `msha-controller-operator-history`.
- **Bolinder Resources ESOP and Trust et al → Bolinder Resources LLC:** 2024-06-04 through current/open; derived from co-tenure at mine 4201881; source `msha-controller-operator-history`.

- History rows: 5
- Typed edges: 11
- Interval anomalies: 1
- 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 — 1 since 2021:** Accidents and injuries 1 historical accident/injury rows; 0 coded fatalities and 0 lost days across the published record.
2. **COMPLIANCE — 17 since 2021:** Violations and penalties 17 violation rows across the full record; 2 carry an S&S flag and $2,208 appears in current assessed amounts.
3. **HEALTH — 2 samples:** Occupational health samples 2 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 7K employee hours and 28 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 2 linked rows:** Contests, conferences and decisions 1 contested-violation rows, 1 civil-penalty docket/decision rows, and 0 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 — 14 since 2021:** Inspections 14 inspection events and 184 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 56.4500 — Heat sources.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4500
- **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 56.12032 — Inspection and cover plates.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12032
- **30 CFR 57.14207 — Parking procedures for unattended equipment.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-M/section-57.14207
- **30 CFR 57.4200 — General requirements.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-C/section-57.4200
- **30 CFR 56.20013 — Waste receptacles.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-S/section-56.20013
- **30 CFR 56.14103 — Operators stations.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14103
- **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 56.20003 — Housekeeping.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-S/section-56.20003

## Source coverage

- **Accident, Injuries, and Illnesses:** 1 rows; 2026-05-03 through 2026-05-03; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2024-11-29 through 2024-11-29; source ID `msha-addresses`
- **Assessed Violations:** 16 rows; 2021-09-08 through 2026-05-18; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 1 rows; 2025-11-24 through 2025-11-24; source ID `msha-civil-penalty-dockets-decisions`
- **Contested Violations:** 1 rows; 2025-03-26 through 2025-03-26; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 38 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 9 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 5 rows; 1984-05-01 through 2020-08-19; source ID `msha-controller-operator-history`
- **Inspections:** 14 rows; 2021-09-08 through 2026-08-25; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 39 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 7 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:** 2 rows; 2026-05-27 through 2026-05-27; source ID `msha-personal-health-samples`
- **Violations:** 17 rows; 2021-09-08 through 2026-05-18; 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/portable-crusher-2-p-450-4201881`
- JSON: `/api/v1/mines/portable-crusher-2-p-450-4201881`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/4201881/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/4201881/relationships`
- MCP resource: `mine://4201881/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`