# Portable #2

- **MSHA mine ID:** 3901323
- **Status:** Intermittent
- **Type / commodity:** Surface / Construction Sand and Gravel
- **Location:** Brule, SD
- **Operator:** T F Luke & Sons Inc
- **Controller:** Thomas E  Luke
- **Public source rows linked:** 449
- **Source coverage:** 14 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Thomas E  Luke (0202701) → T F Luke & Sons Inc (L00693) → Portable #2 (3901323)**

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

## Controller and operator valid-time history

- **Thomas F  Luke → T F Luke & Sons Inc:** 1985-05-01 through 2026-07-11; derived from co-tenure at mine 3901323; source `msha-controller-operator-history`.
- **Thomas E  Luke → T F Luke & Sons Inc:** 2026-07-12 through current/open; derived from co-tenure at mine 3901323; source `msha-controller-operator-history`.

- History rows: 2
- Typed edges: 5
- 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 25 historical accident/injury rows; 0 coded fatalities and 85 lost days across the published record.
2. **COMPLIANCE — 4 since 2021:** Violations and penalties 94 violation rows across the full record; 39 carry an S&S flag and $32,038 appears in current assessed amounts.
3. **HEALTH — 4 samples:** Occupational health samples 4 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 178 employee hours and 1 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 50 linked rows:** Contests, conferences and decisions 20 contested-violation rows, 20 civil-penalty docket/decision rows, and 10 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 — 8 since 2021:** Inspections 41 inspection events and 586 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 50.30 — Preparation and submission of MSHA Form 7000-2—Quarterly Employment and Coal Production Report.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-I/part-50/subpart-D/section-50.30
- **30 CFR 56.12013 — Splices and repairs of power cables.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12013
- **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 56.14100 — 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
- **30 CFR 56.4200 — General requirements.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4200
- **30 CFR 56.11002 — Handrails and toeboards.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-J/section-56.11002
- **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 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

## Source coverage

- **Accident, Injuries, and Illnesses:** 25 rows; 2000-06-06 through 2021-05-07; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2019-11-06 through 2019-11-06; source ID `msha-addresses`
- **Assessed Violations:** 92 rows; 2000-06-27 through 2025-02-11; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 20 rows; 2005-12-09 through 2013-05-01; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 10 rows; 2007-05-03 through 2007-05-03; source ID `msha-conferences`
- **Contested Violations:** 20 rows; 2004-10-26 through 2011-10-18; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 6 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Controller and Operator History:** 2 rows; 1985-05-01 through 1985-05-01; source ID `msha-controller-operator-history`
- **Inspections:** 41 rows; 2000-04-27 through 2026-07-23; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 106 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 27 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:** 4 rows; 2006-06-13 through 2011-07-07; source ID `msha-personal-health-samples`
- **Violations:** 94 rows; 2000-06-27 through 2025-02-11; 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/portable-2-3901323`
- JSON: `/api/v1/mines/portable-2-3901323`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/3901323/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/3901323/relationships`
- MCP resource: `mine://3901323/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`