# Mexia Materials/Redland

- **MSHA mine ID:** 4103231
- **Status:** Abandoned
- **Type / commodity:** Surface / Crushed, Broken Stone NEC
- **Location:** Limestone, TX
- **Operator:** Knife River Corporation-South
- **Controller:** Knife River Corporation
- **Public source rows linked:** 660
- **Source coverage:** 14 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Knife River Corporation (0176802) → Knife River Corporation-South (0065163) → Mexia Materials/Redland (4103231)**

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

## Controller and operator valid-time history

- **Basic Industries Inc → South Texas Construction Company:** 1984-05-01 through 1989-11-21; derived from co-tenure at mine 4103231; source `msha-controller-operator-history`.
- **Redland Plc → Redland Stone Products Company:** 1989-11-22 through 1993-02-23; derived from co-tenure at mine 4103231; source `msha-controller-operator-history`.
- **F M  Young → Young Materials Corporation:** 1993-02-24 through 2003-07-10; derived from co-tenure at mine 4103231; source `msha-controller-operator-history`.
- **MDU Resources Group Inc → Young Materials Corporation:** 2003-07-11 through 2005-10-09; derived from co-tenure at mine 4103231; 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 4103231; source `msha-controller-operator-history`.
- **Knife River Corporation → Knife River Corporation-South:** 2023-06-01 through current/open; derived from co-tenure at mine 4103231; source `msha-controller-operator-history`.

- History rows: 6
- Typed edges: 16
- 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 0 historical accident/injury rows; 0 coded fatalities and 0 lost days across the published record.
2. **COMPLIANCE — 0 since 2021:** Violations and penalties 50 violation rows across the full record; 11 carry an S&S flag and $4,273 appears in current assessed amounts.
3. **HEALTH — 7 samples:** Occupational health samples 7 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 0 employee hours and 0 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 21 linked rows:** Contests, conferences and decisions 3 contested-violation rows, 14 civil-penalty docket/decision rows, and 4 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 25 inspection events and 408 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 56.14108 — Overhead drive belts.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14108
- **30 CFR 56.14205 — Machinery, equipment, and tools.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14205
- **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 56.11002 — Handrails and toeboards.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-J/section-56.11002
- **30 CFR 56.14207 — Parking procedures for unattended equipment.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14207
- **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
- **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 56.12001 — Circuit overload protection.** (4 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12001

## Source coverage

- **Addresses of Record:** 1 rows; 2010-04-12 through 2010-04-12; source ID `msha-addresses`
- **Assessed Violations:** 48 rows; 2000-02-29 through 2009-05-19; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 14 rows; 2001-01-31 through 2009-11-23; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 4 rows; 2000-03-17 through 2000-03-17; source ID `msha-conferences`
- **Contested Violations:** 3 rows; 2009-05-19 through 2009-05-19; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 313 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 73 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 6 rows; 1984-05-01 through 2005-10-10; source ID `msha-controller-operator-history`
- **Inspections:** 25 rows; 2000-02-29 through 2009-05-18; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 95 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 20 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:** 7 rows; 2005-02-15 through 2009-03-18; source ID `msha-personal-health-samples`
- **Violations:** 50 rows; 2000-02-29 through 2009-05-19; 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/mexia-materials-redland-4103231`
- JSON: `/api/v1/mines/mexia-materials-redland-4103231`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/4103231/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/4103231/relationships`
- MCP resource: `mine://4103231/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`