# Knife River Portable Plant #1

- **MSHA mine ID:** 1302152
- **Status:** Abandoned
- **Type / commodity:** Surface / Construction Sand and Gravel
- **Location:** Woodbury, IA
- **Operator:** Knife River North Central
- **Controller:** Knife River Corporation
- **Public source rows linked:** 144
- **Source coverage:** 12 / 20
- **Generated:** 2026-10-17T06:17:15.228Z

## Current entity hierarchy

**Knife River Corporation (0176802) → Knife River North Central (L00358) → Knife River Portable Plant #1 (1302152)**

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

## Controller and operator valid-time history

- **Charles P  Becker → Becker Gravel Company Inc:** 1988-04-01 through 2004-09-12; derived from co-tenure at mine 1302152; source `msha-controller-operator-history`.
- **Curtis G Roverud et al → Knife River Midwest LLC:** 2004-09-13 through 2004-02-04; derived from co-tenure at mine 1302152; source `msha-controller-operator-history`.
- **Jeff C Roverud et al → Knife River Midwest LLC:** 2004-09-13 through 2004-02-04; derived from co-tenure at mine 1302152; source `msha-controller-operator-history`.
- **MDU Resources Group Inc → Knife River Midwest LLC:** 2004-09-13 through 2012-02-06; derived from co-tenure at mine 1302152; source `msha-controller-operator-history`.
- **Bauerly Brothers Inc → Knife River North Central:** 2012-02-07 through 2001-04-25; derived from co-tenure at mine 1302152; source `msha-controller-operator-history`.
- **MDU Resources Group Inc → Knife River North Central:** 2012-02-07 through 2023-05-31; derived from co-tenure at mine 1302152; source `msha-controller-operator-history`.
- **Knife River Corporation → Knife River North Central:** 2023-06-01 through current/open; derived from co-tenure at mine 1302152; source `msha-controller-operator-history`.

- History rows: 7
- Typed edges: 16
- Interval anomalies: 3
- 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 1 historical accident/injury rows; 0 coded fatalities and 5 lost days across the published record.
2. **COMPLIANCE — 0 since 2021:** Violations and penalties 24 violation rows across the full record; 1 carry an S&S flag and $2,282 appears in current assessed amounts.
3. **HEALTH — 4 samples:** Occupational health samples 4 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 1K employee hours and 4 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 — 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 — 0 since 2021:** Inspections 27 inspection events and 222 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 56.13015 — Inspection of compressed-air receivers and other unfired pressure vessels.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-L/section-56.13015
- **30 CFR 56.12004 — Electrical conductors.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12004
- **30 CFR 46.9 — Records of training.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-46/section-46.9
- **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
- **30 CFR 56.14206 — Securing movable parts.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14206
- **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 56.14107 — 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 56.14101 — 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 56.1000 — 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 46.12 — Responsibility for independent contractor training.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-46/section-46.12

## Source coverage

- **Accident, Injuries, and Illnesses:** 1 rows; 2008-09-05 through 2008-09-05; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2013-05-08 through 2013-05-08; source ID `msha-addresses`
- **Assessed Violations:** 24 rows; 2000-08-30 through 2012-11-14; source ID `msha-assessed-violations`
- **Conferences:** 1 rows; 2007-10-10 through 2007-10-10; source ID `msha-conferences`
- **Contractor Employment and Production — Quarterly:** 4 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Controller and Operator History:** 7 rows; 1988-04-01 through 2012-02-07; source ID `msha-controller-operator-history`
- **Inspections:** 27 rows; 2000-06-28 through 2012-11-14; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 24 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 26 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:** 4 rows; 2004-06-23 through 2009-10-28; source ID `msha-personal-health-samples`
- **Violations:** 24 rows; 2000-08-30 through 2012-11-14; 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/knife-river-portable-plant-1-1302152`
- JSON: `/api/v1/mines/knife-river-portable-plant-1-1302152`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/1302152/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/1302152/relationships`
- MCP resource: `mine://1302152/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`