# Waimea Quarry

- **MSHA mine ID:** 5100195
- **Status:** Active
- **Type / commodity:** Surface / Crushed, Broken Stone NEC
- **Location:** Hawaii, HI
- **Operator:** West Hawaii Concrete
- **Controller:** Knife River Corporation
- **Public source rows linked:** 315
- **Source coverage:** 13 / 20
- **Generated:** 2026-10-17T06:17:15.228Z

## Current entity hierarchy

**Knife River Corporation (0176802) → West Hawaii Concrete (0050680) → Waimea Quarry (5100195)**

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

## Controller and operator valid-time history

- **Carl  Simons → West Hawaii Concrete Ltd:** 1987-12-01 through 1988-08-16; derived from co-tenure at mine 5100195; source `msha-controller-operator-history`.
- **Grace Pacific Corp → Grace Pacific Corp:** 1988-08-17 through 1988-08-19; derived from co-tenure at mine 5100195; source `msha-controller-operator-history`.
- **Carl  Simons → West Hawaii Concrete Ltd:** 1988-08-20 through 2001-07-18; derived from co-tenure at mine 5100195; source `msha-controller-operator-history`.
- **MDU Resources Group Inc → West Hawaii Concrete:** 2001-07-19 through 2023-05-31; derived from co-tenure at mine 5100195; source `msha-controller-operator-history`.
- **Alexander & Baldwin Incorporated → Grace Pacific Corp:** 2013-10-01 through 1988-08-19; derived from co-tenure at mine 5100195; source `msha-controller-operator-history`.
- **Knife River Corporation → West Hawaii Concrete:** 2023-06-01 through current/open; derived from co-tenure at mine 5100195; source `msha-controller-operator-history`.
- **Nan Inc → Grace Pacific Corp:** 2023-11-15 through 1988-08-19; derived from co-tenure at mine 5100195; source `msha-controller-operator-history`.

- History rows: 7
- Typed edges: 17
- Interval anomalies: 2
- 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 4 historical accident/injury rows; 0 coded fatalities and 13 lost days across the published record.
2. **COMPLIANCE — 4 since 2021:** Violations and penalties 75 violation rows across the full record; 13 carry an S&S flag and $8,368 appears in current assessed amounts.
3. **HEALTH — 21 samples:** Occupational health samples 21 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 10K employee hours and 14 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 7 linked rows:** Contests, conferences and decisions 3 contested-violation rows, 3 civil-penalty docket/decision rows, and 1 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 — 11 since 2021:** Inspections 53 inspection events and 615 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 56.12004 — Electrical conductors.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12004
- **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 56.14107 — Moving machine parts.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14107
- **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 56.14100 — 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 56.12032 — 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 56.9315 — Dust control.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-H/section-56.9315
- **30 CFR 56.12006 — Distribution boxes.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12006
- **30 CFR 56.16005 — Securing gas cylinders.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-O/section-56.16005
- **30 CFR 56.14112 — Construction and maintenance of guards.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14112
- **30 CFR 56.15001 — First-aid materials.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-N/section-56.15001

## Source coverage

- **Accident, Injuries, and Illnesses:** 4 rows; 2003-11-26 through 2004-12-30; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2016-12-19 through 2016-12-19; source ID `msha-addresses`
- **Assessed Violations:** 75 rows; 2000-01-11 through 2025-04-25; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 3 rows; 2011-05-17 through 2016-06-24; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 1 rows; 2005-05-25 through 2005-05-25; source ID `msha-conferences`
- **Contested Violations:** 3 rows; 2009-10-19 through 2016-01-26; source ID `msha-contested-violations`
- **Controller and Operator History:** 7 rows; 1987-12-01 through 2001-07-19; source ID `msha-controller-operator-history`
- **Inspections:** 53 rows; 2000-01-11 through 2026-07-13; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 20 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 51 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:** 21 rows; 2001-02-06 through 2024-01-04; source ID `msha-personal-health-samples`
- **Violations:** 75 rows; 2000-01-11 through 2025-04-25; 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/waimea-quarry-5100195`
- JSON: `/api/v1/mines/waimea-quarry-5100195`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/5100195/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/5100195/relationships`
- MCP resource: `mine://5100195/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`