# Jig Plant #1

- **MSHA mine ID:** 3200777
- **Status:** Intermittent
- **Type / commodity:** Surface / Construction Sand and Gravel
- **Location:** Kidder, ND
- **Operator:** Knife River Corporation-North Central
- **Controller:** Knife River Corporation
- **Public source rows linked:** 270
- **Source coverage:** 12 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Knife River Corporation (0176802) → Knife River Corporation-North Central (L00358) → Jig Plant #1 (3200777)**

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

## Controller and operator valid-time history

- **Leo  Klein Jr → Pioneer Construction Inc:** 2000-04-01 through 2003-07-01; derived from co-tenure at mine 3200777; source `msha-controller-operator-history`.
- **MDU Resources Group Inc → Atlas Inc a Div of Knife River Corporation:** 2003-07-02 through 2007-12-31; derived from co-tenure at mine 3200777; source `msha-controller-operator-history`.
- **Bauerly Brothers Inc → Knife River Corporation-North Central:** 2008-01-01 through 2001-04-25; derived from co-tenure at mine 3200777; source `msha-controller-operator-history`.
- **MDU Resources Group Inc → Knife River Corporation-North Central:** 2008-01-01 through 2023-05-31; derived from co-tenure at mine 3200777; 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 3200777; source `msha-controller-operator-history`.

- History rows: 5
- Typed edges: 13
- 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 — 1 since 2021:** Accidents and injuries 1 historical accident/injury rows; 0 coded fatalities and 1 lost days across the published record.
2. **COMPLIANCE — 4 since 2021:** Violations and penalties 42 violation rows across the full record; 4 carry an S&S flag and $5,259 appears in current assessed amounts.
3. **HEALTH — 8 samples:** Occupational health samples 8 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 2 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 2 linked rows:** Contests, conferences and decisions 1 contested-violation rows, 1 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 — 7 since 2021:** Inspections 35 inspection events and 444 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 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
- **30 CFR 56.16006 — Protection of gas cylinder valves.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-O/section-56.16006
- **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.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-A/section-56.1000
- **30 CFR 56.12008 — Insulation and fittings for power wires and cables.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12008
- **30 CFR 56.14107 — Moving machine parts.** (3 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14107
- **30 CFR 56.12018 — Identification of power switches.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12018
- **30 CFR 56.12004 — Electrical conductors.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12004
- **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

## Source coverage

- **Accident, Injuries, and Illnesses:** 1 rows; 2023-06-14 through 2023-06-14; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2003-07-18 through 2003-07-18; source ID `msha-addresses`
- **Assessed Violations:** 42 rows; 2000-08-09 through 2025-05-08; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 1 rows; 2012-04-24 through 2012-04-24; source ID `msha-civil-penalty-dockets-decisions`
- **Contested Violations:** 1 rows; 2011-06-01 through 2011-06-01; source ID `msha-contested-violations`
- **Controller and Operator History:** 5 rows; 2000-04-01 through 2008-01-01; source ID `msha-controller-operator-history`
- **Inspections:** 35 rows; 2000-08-09 through 2026-05-28; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 106 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 27 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:** 8 rows; 2004-11-17 through 2026-05-28; source ID `msha-personal-health-samples`
- **Violations:** 42 rows; 2000-08-09 through 2025-05-08; 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/jig-plant-1-3200777`
- JSON: `/api/v1/mines/jig-plant-1-3200777`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/3200777/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/3200777/relationships`
- MCP resource: `mine://3200777/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`