# Ball Road Quarry

- **MSHA mine ID:** 3503771
- **Status:** Active
- **Type / commodity:** Surface / Crushed, Broken Basalt
- **Location:** Clackamas, OR
- **Operator:** Knife River Corporation-Northwest
- **Controller:** Knife River Corporation
- **Public source rows linked:** 465
- **Source coverage:** 15 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Knife River Corporation (0176802) → Knife River Corporation-Northwest (L16679) → Ball Road Quarry (3503771)**

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

## Controller and operator valid-time history

- **Gary T  Baker → Baker Rock Resources:** 2011-10-20 through 2022-01-17; derived from co-tenure at mine 3503771; source `msha-controller-operator-history`.
- **MDU Resources Group Inc → Knife River Corporation-Northwest:** 2022-01-18 through 2023-05-31; derived from co-tenure at mine 3503771; source `msha-controller-operator-history`.
- **Knife River Corporation → Knife River Corporation-Northwest:** 2023-06-01 through current/open; derived from co-tenure at mine 3503771; source `msha-controller-operator-history`.

- History rows: 3
- Typed edges: 8
- 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 — 1 since 2021:** Accidents and injuries 16 historical accident/injury rows; 0 coded fatalities and 363 lost days across the published record.
2. **COMPLIANCE — 12 since 2021:** Violations and penalties 71 violation rows across the full record; 15 carry an S&S flag and $18,404 appears in current assessed amounts.
3. **HEALTH — 12 samples:** Occupational health samples 12 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 5K employee hours and 8 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 50 linked rows:** Contests, conferences and decisions 21 contested-violation rows, 21 civil-penalty docket/decision rows, and 8 conference records linked by issuance number.
6. **CONTRACTORS — 2 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 — 17 since 2021:** Inspections 42 inspection events and 569 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 56.14100 — Safety defects; examination, correction and records.** (3 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14100
- **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 56.14132 — 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 56.13015 — 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 56.14207 — Parking procedures for unattended equipment.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14207
- **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 62.130 — Permissible exposure level.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-M/part-62/section-62.130
- **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

## Source coverage

- **Accident, Injuries, and Illnesses:** 16 rows; 2012-10-12 through 2021-03-03; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2013-07-15 through 2013-07-15; source ID `msha-addresses`
- **Assessed Violations:** 71 rows; 2011-11-23 through 2025-11-03; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 21 rows; 2014-01-14 through 2021-12-15; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 8 rows; 2019-05-28 through 2020-06-19; source ID `msha-conferences`
- **Contested Violations:** 21 rows; 2013-06-18 through 2021-04-14; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 89 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 23 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 3 rows; 2011-10-20 through 2022-01-18; source ID `msha-controller-operator-history`
- **Inspections:** 42 rows; 2011-11-22 through 2026-05-26; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 68 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 18 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:** 12 rows; 2014-03-07 through 2026-05-27; source ID `msha-personal-health-samples`
- **Violations:** 71 rows; 2011-11-23 through 2025-11-03; 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/ball-road-quarry-3503771`
- JSON: `/api/v1/mines/ball-road-quarry-3503771`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/3503771/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/3503771/relationships`
- MCP resource: `mine://3503771/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`