# Mahukona Ranch mobile crusher

- **MSHA mine ID:** 5100270
- **Status:** Intermittent
- **Type / commodity:** Surface / Crushed, Broken Stone NEC
- **Location:** Hawaii, HI
- **Operator:** Mahukona Ranch LLC
- **Controller:** John F  Metzler; Joni J  Metzler
- **Public source rows linked:** 54
- **Source coverage:** 9 / 20
- **Generated:** 2026-10-17T06:17:15.228Z

## Current entity hierarchy

**John F  Metzler; Joni J  Metzler (0098373) → Mahukona Ranch LLC (0116145) → Mahukona Ranch mobile crusher (5100270)**

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

## Controller and operator valid-time history

- **Joni J  Metzler et al → Mahukona Ranch LLC:** 2011-01-04 through current/open; derived from co-tenure at mine 5100270; source `msha-controller-operator-history`.
- **John F  Metzler et al → Mahukona Ranch LLC:** 2011-01-04 through current/open; derived from co-tenure at mine 5100270; source `msha-controller-operator-history`.

- History rows: 2
- Typed edges: 4
- 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: 2026-10-17T05:35:58.500035+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 — 2 since 2021:** Violations and penalties 9 violation rows across the full record; 1 carry an S&S flag and $1,168 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 — No published quarter:** Quarterly production and employment The source remains registered, but no mine-keyed quarterly production row was published.
5. **LEGAL — 2 linked rows:** Contests, conferences and decisions 0 contested-violation rows, 0 civil-penalty docket/decision rows, and 2 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 13 inspection events and 155 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 50.30 — Preparation and submission of MSHA Form 7000-2—Quarterly Employment and Coal Production Report.** (4 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-I/part-50/subpart-D/section-50.30
- **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
- **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 56.9300 — 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 47.41 — Requirement for container labels.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-47/subpart-E/section-47.41
- **30 CFR 56.4101 — Warning signs.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4101

## Source coverage

- **Addresses of Record:** 1 rows; 2014-10-22 through 2014-10-22; source ID `msha-addresses`
- **Assessed Violations:** 9 rows; 2015-01-27 through 2025-12-09; source ID `msha-assessed-violations`
- **Conferences:** 2 rows; 2016-02-29 through 2016-02-29; source ID `msha-conferences`
- **Controller and Operator History:** 2 rows; 2011-01-04 through 2011-01-04; source ID `msha-controller-operator-history`
- **Inspections:** 13 rows; 2012-05-14 through 2025-12-09; source ID `msha-inspections`
- **Mine Employment and Production — Yearly:** 15 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; 2016-01-28 through 2016-01-28; source ID `msha-personal-health-samples`
- **Violations:** 9 rows; 2015-01-27 through 2025-12-09; 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/mahukona-ranch-mobile-crusher-5100270`
- JSON: `/api/v1/mines/mahukona-ranch-mobile-crusher-5100270`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/5100270/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/5100270/relationships`
- MCP resource: `mine://5100270/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`