# PORTABLE CRUSHER 4

- **MSHA mine ID:** 3200743
- **Status:** Intermittent
- **Type / commodity:** Surface / Construction Sand and Gravel
- **Location:** Walsh, ND
- **Operator:** Close Construction Company Inc
- **Controller:** Diane M Close
- **Public source rows linked:** 387
- **Source coverage:** 11 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Diane M Close (0178001) → Close Construction Company Inc (L13175) → PORTABLE CRUSHER 4 (3200743)**

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

## Controller and operator valid-time history

- **Diane M  Close  et al → Close Construction Company Inc:** 1995-05-01 through 2023-04-24; derived from co-tenure at mine 3200743; source `msha-controller-operator-history`.
- **Greg J  Close  et al → Close Construction Company Inc:** 1995-05-01 through 2023-04-24; derived from co-tenure at mine 3200743; source `msha-controller-operator-history`.
- **Diane M Close → Close Construction Company Inc:** 2023-04-25 through current/open; derived from co-tenure at mine 3200743; source `msha-controller-operator-history`.

- History rows: 3
- Typed edges: 6
- 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 0 historical accident/injury rows; 0 coded fatalities and 0 lost days across the published record.
2. **COMPLIANCE — 0 since 2021:** Violations and penalties 59 violation rows across the full record; 19 carry an S&S flag and $27,017 appears in current assessed amounts.
3. **HEALTH — 7 samples:** Occupational health samples 7 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 — 12 linked rows:** Contests, conferences and decisions 6 contested-violation rows, 6 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 — 5 since 2021:** Inspections 30 inspection events and 410 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 56.14103 — 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 56.14130 — Roll-over protective structures (ROPS) and seat belts.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14130
- **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 56.18010 — First aid.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-Q/section-56.18010
- **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
- **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 56.14101 — Brakes.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14101
- **30 CFR 56.9301 — Dump site restraints.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-H/section-56.9301
- **30 CFR 56.18002 — Examination of working places.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-Q/section-56.18002

## Source coverage

- **Addresses of Record:** 1 rows; 2024-06-26 through 2024-06-26; source ID `msha-addresses`
- **Assessed Violations:** 59 rows; 2001-05-15 through 2013-08-07; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 6 rows; 2007-08-06 through 2007-08-24; source ID `msha-civil-penalty-dockets-decisions`
- **Contested Violations:** 6 rows; 2006-10-24 through 2006-10-25; source ID `msha-contested-violations`
- **Controller and Operator History:** 3 rows; 1995-05-01 through 1995-05-01; source ID `msha-controller-operator-history`
- **Inspections:** 30 rows; 2000-05-09 through 2026-09-09; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 188 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 27 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:** 7 rows; 2005-07-28 through 2011-11-02; source ID `msha-personal-health-samples`
- **Violations:** 59 rows; 2001-05-15 through 2013-08-07; 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-4-3200743`
- JSON: `/api/v1/mines/portable-crusher-4-3200743`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/3200743/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/3200743/relationships`
- MCP resource: `mine://3200743/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`