# Portable Plant

- **MSHA mine ID:** 5100224
- **Status:** Active
- **Type / commodity:** Surface / Construction Sand and Gravel
- **Location:** Honolulu, HI
- **Operator:** Pacific Aggregate
- **Controller:** Deborah A  Wilderman
- **Public source rows linked:** 598
- **Source coverage:** 9 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Deborah A  Wilderman (0177761) → Pacific Aggregate (0051342) → Portable Plant (5100224)**

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

## Controller and operator valid-time history

- **MDU Resources Group Inc → Hawaiian Cement:** 1997-03-01 through 1998-02-10; derived from co-tenure at mine 5100224; source `msha-controller-operator-history`.
- **Lawrence E  Wilderman → Industrial Parts Hawaii Inc:** 1998-02-11 through 2003-03-10; derived from co-tenure at mine 5100224; source `msha-controller-operator-history`.
- **Lawrence E  Wilderman → Pacific Aggregate:** 2003-03-11 through 2021-09-05; derived from co-tenure at mine 5100224; source `msha-controller-operator-history`.
- **Deborah A  Wilderman → Pacific Aggregate:** 2021-09-06 through current/open; derived from co-tenure at mine 5100224; source `msha-controller-operator-history`.
- **Knife River Corporation → Hawaiian Cement:** 2023-06-01 through 1998-02-10; derived from co-tenure at mine 5100224; source `msha-controller-operator-history`.

- History rows: 5
- Typed edges: 13
- 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 — 0 since 2021:** Accidents and injuries 0 historical accident/injury rows; 0 coded fatalities and 0 lost days across the published record.
2. **COMPLIANCE — 13 since 2021:** Violations and penalties 142 violation rows across the full record; 32 carry an S&S flag and $15,706 appears in current assessed amounts.
3. **HEALTH — 9 samples:** Occupational health samples 9 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 5K employee hours and 11 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 0 linked rows:** Contests, conferences and decisions 0 contested-violation rows, 0 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 — 12 since 2021:** Inspections 56 inspection events and 848 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 56.14100 — 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 56.11002 — Handrails and toeboards.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-J/section-56.11002
- **30 CFR 56.14201 — Conveyor start-up warnings.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14201
- **30 CFR 50.30 — Preparation and submission of MSHA Form 7000-2—Quarterly Employment and Coal Production Report.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-I/part-50/subpart-D/section-50.30
- **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 41.12 — Changes; notification by operator.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-G/part-41/subpart-B/section-41.12
- **30 CFR 56.14101 — Brakes.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14101
- **30 CFR 56.9300 — Berms or guardrails.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-H/section-56.9300
- **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 56.15003 — Protective footwear.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-N/section-56.15003
- **30 CFR 56.15020 — Life jackets and belts.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-N/section-56.15020

## Source coverage

- **Addresses of Record:** 1 rows; 2003-12-15 through 2003-12-15; source ID `msha-addresses`
- **Assessed Violations:** 134 rows; 2000-11-13 through 2026-07-06; source ID `msha-assessed-violations`
- **Controller and Operator History:** 5 rows; 1997-03-01 through 2003-03-11; source ID `msha-controller-operator-history`
- **Inspections:** 56 rows; 2000-11-13 through 2026-07-06; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 200 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 50 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:** 9 rows; 2003-02-26 through 2021-04-21; source ID `msha-personal-health-samples`
- **Violations:** 142 rows; 2000-11-13 through 2026-07-06; 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/portable-plant-5100224`
- JSON: `/api/v1/mines/portable-plant-5100224`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/5100224/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/5100224/relationships`
- MCP resource: `mine://5100224/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`