# Crusher #1

- **MSHA mine ID:** 1002089
- **Status:** Active
- **Type / commodity:** Surface / Construction Sand and Gravel
- **Location:** Ada, ID
- **Operator:** Knife River Corporation Mountain West
- **Controller:** Knife River Corporation
- **Public source rows linked:** 333
- **Source coverage:** 12 / 20
- **Generated:** 2026-10-17T06:17:15.228Z

## Current entity hierarchy

**Knife River Corporation (0176802) → Knife River Corporation Mountain West (0190793) → Crusher #1 (1002089)**

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

## Controller and operator valid-time history

- **MDU Resources Group Inc → Knife River:** 2006-03-08 through 2009-12-31; derived from co-tenure at mine 1002089; source `msha-controller-operator-history`.
- **MDU Resources Group Inc → Knife River Southern Idaho Division:** 2010-01-01 through 2023-05-31; derived from co-tenure at mine 1002089; source `msha-controller-operator-history`.
- **Knife River Corporation → Knife River Southern Idaho Division:** 2023-06-01 through 2023-05-31; derived from co-tenure at mine 1002089; source `msha-controller-operator-history`.
- **Knife River Corporation → Knife River Corporation Mountain West:** 2023-06-01 through current/open; derived from co-tenure at mine 1002089; source `msha-controller-operator-history`.

- History rows: 4
- Typed edges: 10
- 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: 2026-10-17T05:35:58.500035+00:00.

## Assessment signals

1. **SAFETY — 3 since 2021:** Accidents and injuries 11 historical accident/injury rows; 0 coded fatalities and 194 lost days across the published record.
2. **COMPLIANCE — 19 since 2021:** Violations and penalties 100 violation rows across the full record; 23 carry an S&S flag and $56,006 appears in current assessed amounts.
3. **HEALTH — 23 samples:** Occupational health samples 23 personal. 1 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 — 18 linked rows:** Contests, conferences and decisions 5 contested-violation rows, 5 civil-penalty docket/decision rows, and 8 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 — 14 since 2021:** Inspections 56 inspection events and 641 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 50.20 — Preparation and submission of MSHA Report Form 7000-1—Mine Accident, Injury, and Illness Report.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-I/part-50/subpart-C/section-50.20
- **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 56.14107 — 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 56.14100 — Safety defects; examination, correction and records.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14100
- **30 CFR 56.14103 — Operators stations.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14103
- **30 CFR 56.4201 — Inspection.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4201
- **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 56.12002 — Controls and switches.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12002
- **30 CFR 56.4203 — Extinguisher recharging or replacement.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4203
- **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

## Source coverage

- **Accident, Injuries, and Illnesses:** 11 rows; 2009-07-21 through 2026-07-30; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2009-10-12 through 2009-10-12; source ID `msha-addresses`
- **Assessed Violations:** 98 rows; 2006-07-25 through 2025-01-13; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 5 rows; 2007-10-02 through 2021-04-01; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 8 rows; 2006-08-15 through 2020-03-27; source ID `msha-conferences`
- **Contested Violations:** 5 rows; 2007-01-10 through 2020-09-16; source ID `msha-contested-violations`
- **Controller and Operator History:** 4 rows; 2006-03-08 through 2023-06-01; source ID `msha-controller-operator-history`
- **Inspections:** 56 rows; 2006-07-25 through 2026-05-04; source ID `msha-inspections`
- **Mine Employment and Production — Yearly:** 21 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:** 23 rows; 2009-10-14 through 2025-11-25; source ID `msha-personal-health-samples`
- **Violations:** 100 rows; 2006-07-25 through 2025-01-13; 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/crusher-1-1002089`
- JSON: `/api/v1/mines/crusher-1-1002089`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/1002089/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/1002089/relationships`
- MCP resource: `mine://1002089/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`