# KIRTLAND

- **MSHA mine ID:** 3500512
- **Status:** Active
- **Type / commodity:** Surface / Construction Sand and Gravel
- **Location:** Jackson, OR
- **Operator:** Knife River Corporation-Northwest
- **Controller:** Knife River Corporation
- **Public source rows linked:** 1,027
- **Source coverage:** 15 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Knife River Corporation (0176802) → Knife River Corporation-Northwest (L16679) → KIRTLAND (3500512)**

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

## Controller and operator valid-time history

- **C Gregg  Lininger → M C Lininger & Sons Inc:** 1950-01-01 through 1988-06-01; derived from co-tenure at mine 3500512; source `msha-controller-operator-history`.
- **Earl W  Lininger et al → Rogue Aggregates Inc:** 1988-06-02 through 1990-06-30; derived from co-tenure at mine 3500512; source `msha-controller-operator-history`.
- **Terra Industries Inc → Rogue Aggregates Inc:** 1990-07-01 through 1993-08-31; derived from co-tenure at mine 3500512; source `msha-controller-operator-history`.
- **MDU Resources Group Inc → Rogue Aggregates Inc:** 1993-09-01 through 2010-08-17; derived from co-tenure at mine 3500512; source `msha-controller-operator-history`.
- **MDU Resources Group Inc → Knife River Corporation-Northwest:** 2010-08-18 through 2023-05-31; derived from co-tenure at mine 3500512; source `msha-controller-operator-history`.
- **Knife River Corporation → Knife River Corporation-Northwest:** 2023-06-01 through current/open; derived from co-tenure at mine 3500512; source `msha-controller-operator-history`.

- History rows: 6
- Typed edges: 17
- 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 — 4 since 2021:** Accidents and injuries 12 historical accident/injury rows; 0 coded fatalities and 0 lost days across the published record.
2. **COMPLIANCE — 21 since 2021:** Violations and penalties 182 violation rows across the full record; 27 carry an S&S flag and $28,961 appears in current assessed amounts.
3. **HEALTH — 31 samples:** Occupational health samples 31 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 11K employee hours and 10 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 21 linked rows:** Contests, conferences and decisions 6 contested-violation rows, 6 civil-penalty docket/decision rows, and 9 conference records linked by issuance number.
6. **CONTRACTORS — 4 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 — 15 since 2021:** Inspections 68 inspection events and 1K 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 56.12032 — 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 56.14112 — 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 56.14107 — 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 56.12008 — 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 56.9300 — 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 56.9301 — Dump site restraints.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-H/section-56.9301
- **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 56.11003 — Construction and maintenance of ladders.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-J/section-56.11003
- **30 CFR 56.14110 — Flying or falling materials.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14110
- **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:** 12 rows; 2000-04-13 through 2024-06-24; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2014-04-15 through 2014-04-15; source ID `msha-addresses`
- **Assessed Violations:** 179 rows; 2000-09-06 through 2026-04-15; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 6 rows; 2008-02-05 through 2025-11-17; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 9 rows; 2004-01-09 through 2024-06-10; source ID `msha-conferences`
- **Contested Violations:** 6 rows; 2007-01-23 through 2024-04-29; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 208 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 54 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 6 rows; 1950-01-01 through 2010-08-18; source ID `msha-controller-operator-history`
- **Inspections:** 68 rows; 2000-09-05 through 2026-04-13; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 210 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 54 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:** 31 rows; 2002-05-16 through 2026-04-15; source ID `msha-personal-health-samples`
- **Violations:** 182 rows; 2000-09-06 through 2026-04-15; 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/kirtland-3500512`
- JSON: `/api/v1/mines/kirtland-3500512`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/3500512/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/3500512/relationships`
- MCP resource: `mine://3500512/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`