# River Bend Pit

- **MSHA mine ID:** 4102639
- **Status:** Abandoned
- **Type / commodity:** Surface / Construction Sand and Gravel
- **Location:** Brazos, TX
- **Operator:** Knife River Corporation-South
- **Controller:** Knife River Corporation
- **Public source rows linked:** 559
- **Source coverage:** 13 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Knife River Corporation (0176802) → Knife River Corporation-South (0065163) → River Bend Pit (4102639)**

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

## Controller and operator valid-time history

- **F M  Young → Young Materials:** 1950-01-01 through 2003-07-10; derived from co-tenure at mine 4102639; source `msha-controller-operator-history`.
- **MDU Resources Group Inc → Young Materials:** 2003-07-11 through 2005-10-09; derived from co-tenure at mine 4102639; source `msha-controller-operator-history`.
- **MDU Resources Group Inc → Knife River Corporation-South:** 2005-10-10 through 2023-05-31; derived from co-tenure at mine 4102639; source `msha-controller-operator-history`.
- **Knife River Corporation → Knife River Corporation-South:** 2023-06-01 through current/open; derived from co-tenure at mine 4102639; source `msha-controller-operator-history`.

- History rows: 4
- Typed edges: 10
- 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: 2026-10-13T11:19:05.459773+00:00.

## Assessment signals

1. **SAFETY — 0 since 2021:** Accidents and injuries 6 historical accident/injury rows; 0 coded fatalities and 6 lost days across the published record.
2. **COMPLIANCE — 5 since 2021:** Violations and penalties 102 violation rows across the full record; 22 carry an S&S flag and $11,433 appears in current assessed amounts.
3. **HEALTH — 26 samples:** Occupational health samples 26 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 223 employee hours and 3 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 28 linked rows:** Contests, conferences and decisions 7 contested-violation rows, 8 civil-penalty docket/decision rows, and 13 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 55 inspection events and 925 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 56.4201 — 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.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12028
- **30 CFR 56.14132 — Horns and backup alarms.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14132
- **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 56.18002 — 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 56.12021 — Danger signs.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12021
- **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.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12004

## Source coverage

- **Accident, Injuries, and Illnesses:** 6 rows; 2008-01-11 through 2018-06-12; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2024-01-22 through 2024-01-22; source ID `msha-addresses`
- **Assessed Violations:** 102 rows; 2000-03-01 through 2023-07-10; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 8 rows; 2001-01-31 through 2012-02-23; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 13 rows; 2000-03-17 through 2018-05-21; source ID `msha-conferences`
- **Contested Violations:** 7 rows; 2009-01-08 through 2010-10-13; source ID `msha-contested-violations`
- **Controller and Operator History:** 4 rows; 1950-01-01 through 2005-10-10; source ID `msha-controller-operator-history`
- **Inspections:** 55 rows; 2000-03-01 through 2024-01-11; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 186 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 48 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:** 26 rows; 2007-08-08 through 2021-04-21; source ID `msha-personal-health-samples`
- **Violations:** 102 rows; 2000-03-01 through 2023-07-10; 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/river-bend-pit-4102639`
- JSON: `/api/v1/mines/river-bend-pit-4102639`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/4102639/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/4102639/relationships`
- MCP resource: `mine://4102639/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`