# Cascade Quarry

- **MSHA mine ID:** 4503548
- **Status:** Intermittent
- **Type / commodity:** Surface / Crushed, Broken Stone NEC
- **Location:** Snohomish, WA
- **Operator:** HM Pacific Northwest Inc.
- **Controller:** Heidelberg Materials AG
- **Public source rows linked:** 303
- **Source coverage:** 10 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Heidelberg Materials AG (M00004) → HM Pacific Northwest Inc. (0152314) → Cascade Quarry (4503548)**

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

## Controller and operator valid-time history

- **Scott  A  Miller et al → Miller Quarry LLC:** 2003-06-30 through 2006-09-18; derived from co-tenure at mine 4503548; source `msha-controller-operator-history`.
- **Jack C  Miller et al → Miller Quarry LLC:** 2003-06-30 through 2006-09-18; derived from co-tenure at mine 4503548; source `msha-controller-operator-history`.
- **Aaron M  Patsch → RLF Miller Quarry LLC:** 2006-09-19 through 2015-06-30; derived from co-tenure at mine 4503548; source `msha-controller-operator-history`.
- **Taiheiyo Cement Corp → CPC Materials, Inc.:** 2015-07-01 through 2017-10-31; derived from co-tenure at mine 4503548; source `msha-controller-operator-history`.
- **Taiheiyo Cement Corp → CalPortland Company:** 2017-11-01 through 2025-11-03; derived from co-tenure at mine 4503548; source `msha-controller-operator-history`.
- **Heidelberg Materials AG → HM Pacific Northwest Inc.:** 2025-11-04 through current/open; derived from co-tenure at mine 4503548; source `msha-controller-operator-history`.

- History rows: 6
- Typed edges: 16
- 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 — 1 since 2021:** Accidents and injuries 2 historical accident/injury rows; 0 coded fatalities and 21 lost days across the published record.
2. **COMPLIANCE — 22 since 2021:** Violations and penalties 55 violation rows across the full record; 14 carry an S&S flag and $6,805 appears in current assessed amounts.
3. **HEALTH — 11 samples:** Occupational health samples 11 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 523 employee hours and 1 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 — 16 since 2021:** Inspections 39 inspection events and 551 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 56.18010 — 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 56.14100 — 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 56.14101 — Brakes.** (5 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14101
- **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 56.11012 — Protection for openings around travelways.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-J/section-56.11012
- **30 CFR 56.11001 — Safe access.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-J/section-56.11001
- **30 CFR 56.15005 — Safety belts and lines.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-N/section-56.15005
- **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

## Source coverage

- **Accident, Injuries, and Illnesses:** 2 rows; 2019-04-09 through 2022-08-14; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2025-12-20 through 2025-12-20; source ID `msha-addresses`
- **Assessed Violations:** 54 rows; 2003-07-31 through 2025-12-30; source ID `msha-assessed-violations`
- **Controller and Operator History:** 6 rows; 2003-06-30 through 2025-11-04; source ID `msha-controller-operator-history`
- **Inspections:** 39 rows; 2003-07-30 through 2025-12-29; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 103 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 31 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:** 11 rows; 2004-02-04 through 2021-09-21; source ID `msha-personal-health-samples`
- **Violations:** 55 rows; 2003-07-31 through 2025-12-30; 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/cascade-quarry-4503548`
- JSON: `/api/v1/mines/cascade-quarry-4503548`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/4503548/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/4503548/relationships`
- MCP resource: `mine://4503548/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`