# Portable #1

- **MSHA mine ID:** 0405785
- **Status:** Temporarily Idled
- **Type / commodity:** Surface / Construction Sand and Gravel
- **Location:** Fresno, CA
- **Operator:** Kroeker Inc
- **Controller:** Jeff  Kroeker; Jill L.  Kroeker
- **Public source rows linked:** 163
- **Source coverage:** 10 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Jeff  Kroeker; Jill L.  Kroeker (0188781) → Kroeker Inc (0101725) → Portable #1 (0405785)**

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

## Controller and operator valid-time history

- **Jeff  Kroeker et al → Kroeker Inc:** 2009-06-17 through 2024-05-23; derived from co-tenure at mine 0405785; source `msha-controller-operator-history`.
- **Joyce  Kroeker et al → Kroeker Inc:** 2009-06-17 through 2024-05-23; derived from co-tenure at mine 0405785; source `msha-controller-operator-history`.
- **Jill L.  Kroeker et al → Kroeker Inc:** 2024-05-24 through current/open; derived from co-tenure at mine 0405785; source `msha-controller-operator-history`.
- **Jeff  Kroeker et al → Kroeker Inc:** 2024-05-24 through current/open; derived from co-tenure at mine 0405785; source `msha-controller-operator-history`.

- History rows: 4
- Typed edges: 7
- 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 — 2 since 2021:** Violations and penalties 25 violation rows across the full record; 5 carry an S&S flag and $4,853 appears in current assessed amounts.
3. **HEALTH — 0 samples:** Occupational health samples No published samples. 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 395 employee hours and 3 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 2 linked rows:** Contests, conferences and decisions 1 contested-violation rows, 1 civil-penalty docket/decision rows, and 0 conference records linked by issuance number.
6. **CONTRACTORS — 0 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 — 4 since 2021:** Inspections 14 inspection events and 145 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 46.9 — Records of training.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-46/section-46.9
- **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 56.12004 — 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 56.20011 — Barricades and warning signs.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-S/section-56.20011
- **30 CFR 56.5002 — Exposure monitoring.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-D/section-56.5002
- **30 CFR 62.110 — Noise exposure assessment.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-M/part-62/section-62.110
- **30 CFR 56.4201 — Inspection.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4201
- **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 56.14132 — Horns and backup alarms.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14132
- **30 CFR 56.12002 — Controls and switches.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12002
- **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 56.14101 — Brakes.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14101

## Source coverage

- **Addresses of Record:** 1 rows; 2026-07-30 through 2026-07-30; source ID `msha-addresses`
- **Assessed Violations:** 25 rows; 2009-06-17 through 2023-09-14; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 1 rows; 2016-03-07 through 2016-03-07; source ID `msha-civil-penalty-dockets-decisions`
- **Contested Violations:** 1 rows; 2015-03-16 through 2015-03-16; source ID `msha-contested-violations`
- **Controller and Operator History:** 4 rows; 2009-06-17 through 2009-06-17; source ID `msha-controller-operator-history`
- **Inspections:** 14 rows; 2009-06-17 through 2025-07-15; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 70 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 21 rows; unknown through unknown; source ID `msha-mine-production-yearly`
- **Mines:** 1 rows; unknown through unknown; source ID `msha-mines`
- **Violations:** 25 rows; 2009-06-17 through 2023-09-14; 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-1-0405785`
- JSON: `/api/v1/mines/portable-1-0405785`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/0405785/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/0405785/relationships`
- MCP resource: `mine://0405785/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`