# Portable Plant #1

- **MSHA mine ID:** 3200963
- **Status:** Intermittent
- **Type / commodity:** Surface / Crushed, Broken Stone NEC
- **Location:** Burleigh, ND
- **Operator:** Knife River Corporation - North Central
- **Controller:** Knife River Corporation
- **Public source rows linked:** 95
- **Source coverage:** 11 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Knife River Corporation (0176802) → Knife River Corporation - North Central (L00358) → Portable Plant #1 (3200963)**

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

## Controller and operator valid-time history

- **Bauerly Brothers Inc → Knife River Corporation - North Central:** 2012-09-07 through 2001-04-25; derived from co-tenure at mine 3200963; source `msha-controller-operator-history`.
- **MDU Resources Group Inc → Knife River Corporation - North Central:** 2012-09-07 through 2023-05-31; derived from co-tenure at mine 3200963; source `msha-controller-operator-history`.
- **Knife River Corporation → Knife River Corporation - North Central:** 2023-06-01 through current/open; derived from co-tenure at mine 3200963; source `msha-controller-operator-history`.

- History rows: 3
- Typed edges: 7
- 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: 2026-10-13T11:19:05.459773+00:00.

## Assessment signals

1. **SAFETY — 0 since 2021:** Accidents and injuries 0 historical accident/injury rows; 0 coded fatalities and 0 lost days across the published record.
2. **COMPLIANCE — 7 since 2021:** Violations and penalties 18 violation rows across the full record; 2 carry an S&S flag and $2,928 appears in current assessed amounts.
3. **HEALTH — 2 samples:** Occupational health samples 1 personal; 1 area. 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 120 employee hours and 1 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 1 linked rows:** Contests, conferences and decisions 0 contested-violation rows, 0 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 — 2 since 2021:** Inspections 8 inspection events and 126 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 56.12032 — Inspection and cover plates.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12032
- **30 CFR 56.14112 — Construction and maintenance of guards.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14112
- **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 56.4101 — Warning signs.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4101
- **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 46.9 — Records of training.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-46/section-46.9
- **30 CFR 56.12008 — Insulation and fittings for power wires and cables.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12008
- **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 56.15020 — Life jackets and belts.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-N/section-56.15020
- **30 CFR 56.12028 — Testing grounding systems.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12028

## Source coverage

- **Addresses of Record:** 1 rows; 2025-05-20 through 2025-05-20; source ID `msha-addresses`
- **Metal and Nonmetal Area Samples:** 1 rows; 2015-08-22 through 2015-08-22; source ID `msha-area-samples`
- **Assessed Violations:** 18 rows; 2012-09-07 through 2026-06-02; source ID `msha-assessed-violations`
- **Conferences:** 1 rows; 2026-03-02 through 2026-03-02; source ID `msha-conferences`
- **Controller and Operator History:** 3 rows; 2012-09-07 through 2012-09-07; source ID `msha-controller-operator-history`
- **Inspections:** 8 rows; 2012-09-07 through 2026-06-01; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 33 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 10 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:** 1 rows; 2026-06-04 through 2026-06-04; source ID `msha-personal-health-samples`
- **Violations:** 18 rows; 2012-09-07 through 2026-06-02; 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/portable-plant-1-3200963`
- JSON: `/api/v1/mines/portable-plant-1-3200963`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/3200963/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/3200963/relationships`
- MCP resource: `mine://3200963/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`