# Plant 2 J Davidson & Sons Const Co Inc

- **MSHA mine ID:** 3503420
- **Status:** Active
- **Type / commodity:** Surface / Crushed, Broken Stone NEC
- **Location:** Douglas, OR
- **Operator:** J Davidson & Sons Construction Company Inc
- **Controller:** David J  Davidson; Jerald M  Davidson
- **Public source rows linked:** 603
- **Source coverage:** 15 / 20
- **Generated:** 2026-10-17T06:17:15.228Z

## Current entity hierarchy

**David J  Davidson; Jerald M  Davidson (M34589) → J Davidson & Sons Construction Company Inc (L34589) → Plant 2 J Davidson & Sons Const Co Inc (3503420)**

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

## Controller and operator valid-time history

- **David J  Davidson  et al → J Davidson & Sons Construction Company Inc:** 1995-06-01 through current/open; derived from co-tenure at mine 3503420; source `msha-controller-operator-history`.
- **Jerald M  Davidson  et al → J Davidson & Sons Construction Company Inc:** 1995-06-01 through current/open; derived from co-tenure at mine 3503420; source `msha-controller-operator-history`.

- History rows: 2
- Typed edges: 4
- 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: 2026-10-17T05:35:58.500035+00:00.

## Assessment signals

1. **SAFETY — 0 since 2021:** Accidents and injuries 5 historical accident/injury rows; 0 coded fatalities and 506 lost days across the published record.
2. **COMPLIANCE — 13 since 2021:** Violations and penalties 85 violation rows across the full record; 19 carry an S&S flag and $11,292 appears in current assessed amounts.
3. **HEALTH — 16 samples:** Occupational health samples 16 personal. 1 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 2K employee hours and 6 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 31 linked rows:** Contests, conferences and decisions 10 contested-violation rows, 12 civil-penalty docket/decision rows, and 9 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 — 15 since 2021:** Inspections 70 inspection events and 830 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 56.12004 — 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 56.18002 — 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 56.5001 — Exposure limits for airborne contaminants.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-D/section-56.5001
- **30 CFR 56.23003 — Requirements for written safety program.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-T/section-56.23003
- **30 CFR 56.9300 — Berms or guardrails.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-H/section-56.9300
- **30 CFR 50.30 — Preparation and submission of MSHA Form 7000-2—Quarterly Employment and Coal Production Report.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-I/part-50/subpart-D/section-50.30
- **30 CFR 56.20003 — Housekeeping.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-S/section-56.20003
- **30 CFR 56.14200 — Warnings prior to starting or moving equipment.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14200
- **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 56.14112 — 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

## Source coverage

- **Accident, Injuries, and Illnesses:** 5 rows; 2000-02-23 through 2018-08-28; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2012-01-15 through 2012-01-15; source ID `msha-addresses`
- **Assessed Violations:** 84 rows; 2000-05-04 through 2026-04-07; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 12 rows; 2000-11-20 through 2026-05-11; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 9 rows; 2002-12-05 through 2008-12-12; source ID `msha-conferences`
- **Contested Violations:** 10 rows; 2009-03-11 through 2025-11-03; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 198 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 53 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 2 rows; 1995-06-01 through 1995-06-01; source ID `msha-controller-operator-history`
- **Inspections:** 70 rows; 2000-02-09 through 2026-04-07; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 22 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 35 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:** 16 rows; 2003-05-29 through 2025-12-15; source ID `msha-personal-health-samples`
- **Violations:** 85 rows; 2000-05-04 through 2026-04-07; 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/plant-2-j-davidson-sons-const-co-inc-3503420`
- JSON: `/api/v1/mines/plant-2-j-davidson-sons-const-co-inc-3503420`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/3503420/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/3503420/relationships`
- MCP resource: `mine://3503420/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`