# Kauai Aggregates

- **MSHA mine ID:** 5100190
- **Status:** Active
- **Type / commodity:** Surface / Crushed, Broken Stone NEC
- **Location:** Kauai, HI
- **Operator:** Kauai Aggregates
- **Controller:** O Thronas Incorporated; Priscilla K  Thronas
- **Public source rows linked:** 959
- **Source coverage:** 15 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**O Thronas Incorporated; Priscilla K  Thronas (0080235) → Kauai Aggregates (0095346) → Kauai Aggregates (5100190)**

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

## Controller and operator valid-time history

- **David  Hulihee et al → Kauai Aggregates:** 1983-02-01 through 2008-07-14; derived from co-tenure at mine 5100190; source `msha-controller-operator-history`.
- **Dwayne R  Steele et al → Kauai Aggregates:** 1983-02-01 through 2008-07-14; derived from co-tenure at mine 5100190; source `msha-controller-operator-history`.
- **O Thronas Incorporated et al → Kauai Aggregates:** 2008-07-15 through current/open; derived from co-tenure at mine 5100190; source `msha-controller-operator-history`.
- **Priscilla K  Thronas et al → Kauai Aggregates:** 2008-07-15 through current/open; derived from co-tenure at mine 5100190; source `msha-controller-operator-history`.

- History rows: 4
- Typed edges: 8
- 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 — 3 since 2021:** Accidents and injuries 6 historical accident/injury rows; 0 coded fatalities and 43 lost days across the published record.
2. **COMPLIANCE — 29 since 2021:** Violations and penalties 210 violation rows across the full record; 75 carry an S&S flag and $91,338 appears in current assessed amounts.
3. **HEALTH — 16 samples:** Occupational health samples 16 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 9K employee hours and 18 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 37 linked rows:** Contests, conferences and decisions 18 contested-violation rows, 18 civil-penalty docket/decision rows, and 1 conference records linked by issuance number.
6. **CONTRACTORS — 2 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 — 13 since 2021:** Inspections 57 inspection events and 1K 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 56.14107 — Moving machine parts.** (4 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14107
- **30 CFR 56.23002 — Written safety program.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-T/section-56.23002
- **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 56.3130 — Wall, bank, and slope stability.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-B/section-56.3130
- **30 CFR 56.14206 — Securing movable parts.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14206
- **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
- **30 CFR 56.4200 — General requirements.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4200
- **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
- **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

## Source coverage

- **Accident, Injuries, and Illnesses:** 6 rows; 2013-08-28 through 2025-11-11; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 1983-03-04 through 1983-03-04; source ID `msha-addresses`
- **Assessed Violations:** 206 rows; 2000-01-17 through 2026-03-10; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 18 rows; 2013-02-25 through 2015-09-11; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 1 rows; 2011-02-24 through 2011-02-24; source ID `msha-conferences`
- **Contested Violations:** 18 rows; 2011-01-27 through 2015-01-27; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 127 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 38 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 4 rows; 1983-02-01 through 2008-07-15; source ID `msha-controller-operator-history`
- **Inspections:** 57 rows; 2000-01-17 through 2026-07-09; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 202 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 54 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:** 16 rows; 2001-02-06 through 2024-01-03; source ID `msha-personal-health-samples`
- **Violations:** 210 rows; 2000-01-17 through 2026-03-10; 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/kauai-aggregates-5100190`
- JSON: `/api/v1/mines/kauai-aggregates-5100190`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/5100190/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/5100190/relationships`
- MCP resource: `mine://5100190/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`