# Kalispell Portable Plant

- **MSHA mine ID:** 2402095
- **Status:** Intermittent
- **Type / commodity:** Surface / Construction Sand and Gravel
- **Location:** Flathead, MT
- **Operator:** Knife River Missoula
- **Controller:** Knife River Corporation
- **Public source rows linked:** 312
- **Source coverage:** 15 / 20
- **Generated:** 2026-10-17T06:17:15.228Z

## Current entity hierarchy

**Knife River Corporation (0176802) → Knife River Missoula (L17688) → Kalispell Portable Plant (2402095)**

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

## Controller and operator valid-time history

- **Frank A  Thomas  et al → Polson Ready Mix Concrete Inc:** 1996-07-01 through 2000-09-30; derived from co-tenure at mine 2402095; source `msha-controller-operator-history`.
- **MDU Resources Group Inc → Polson Ready Mix Concrete Inc:** 2000-10-01 through 2001-12-31; derived from co-tenure at mine 2402095; source `msha-controller-operator-history`.
- **MDU Resources Group Inc → Kalispell Ready Mix:** 2002-01-01 through 2002-08-11; derived from co-tenure at mine 2402095; source `msha-controller-operator-history`.
- **MDU Resources Group Inc → Knife River Missoula:** 2002-08-12 through 2023-05-31; derived from co-tenure at mine 2402095; source `msha-controller-operator-history`.
- **Knife River Corporation → Knife River Missoula:** 2023-06-01 through current/open; derived from co-tenure at mine 2402095; source `msha-controller-operator-history`.

- History rows: 5
- Typed edges: 14
- 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 — 1 since 2021:** Accidents and injuries 1 historical accident/injury rows; 0 coded fatalities and 0 lost days across the published record.
2. **COMPLIANCE — 9 since 2021:** Violations and penalties 37 violation rows across the full record; 9 carry an S&S flag and $5,996 appears in current assessed amounts.
3. **HEALTH — 5 samples:** Occupational health samples 5 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 171 employee hours and 1 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 8 linked rows:** Contests, conferences and decisions 3 contested-violation rows, 3 civil-penalty docket/decision rows, and 2 conference records linked by issuance number.
6. **CONTRACTORS — 1 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 41 inspection events and 450 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 56.1000 — Notification of commencement of operations and closing of mines.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-A/section-56.1000
- **30 CFR 56.12016 — Work on electrically-powered equipment.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12016
- **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 56.4201 — 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 56.12028 — Testing grounding systems.** (3 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12028
- **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 56.4130 — Electric substations and liquid storage facilities.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4130
- **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 56.15001 — 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
- **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

## Source coverage

- **Accident, Injuries, and Illnesses:** 1 rows; 2023-04-14 through 2023-04-14; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2026-08-28 through 2026-08-28; source ID `msha-addresses`
- **Assessed Violations:** 37 rows; 2000-03-21 through 2026-05-13; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 3 rows; 2012-02-16 through 2017-10-19; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 2 rows; 2003-05-23 through 2003-05-23; source ID `msha-conferences`
- **Contested Violations:** 3 rows; 2011-06-28 through 2017-05-09; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 104 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 20 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 5 rows; 1996-07-01 through 2002-08-12; source ID `msha-controller-operator-history`
- **Inspections:** 41 rows; 2000-03-21 through 2026-05-13; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 16 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 36 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:** 5 rows; 2009-08-18 through 2022-09-28; source ID `msha-personal-health-samples`
- **Violations:** 37 rows; 2000-03-21 through 2026-05-13; 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/kalispell-portable-plant-2402095`
- JSON: `/api/v1/mines/kalispell-portable-plant-2402095`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/2402095/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/2402095/relationships`
- MCP resource: `mine://2402095/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`