# Portable Crusher 1

- **MSHA mine ID:** 0405713
- **Status:** Abandoned
- **Type / commodity:** Surface / Sand, Industrial NEC
- **Location:** Riverside, CA
- **Operator:** Rentrac Inc
- **Controller:** John  Bremer
- **Public source rows linked:** 248
- **Source coverage:** 11 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**John  Bremer (0059849) → Rentrac Inc (0071503) → Portable Crusher 1 (0405713)**

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

## Controller and operator valid-time history

- **Jerry S  Hanley → Hi-Line Construction Inc:** 2007-02-26 through 2008-08-15; derived from co-tenure at mine 0405713; source `msha-controller-operator-history`.
- **John  Bremer → Rentrac Inc:** 2008-08-16 through current/open; derived from co-tenure at mine 0405713; source `msha-controller-operator-history`.

- History rows: 2
- Typed edges: 6
- 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 — 0 since 2021:** Violations and penalties 85 violation rows across the full record; 30 carry an S&S flag and $52,332 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 536 employee hours and 4 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 24 linked rows:** Contests, conferences and decisions 9 contested-violation rows, 9 civil-penalty docket/decision rows, and 6 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 — 0 since 2021:** Inspections 20 inspection events and 288 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 56.9300 — 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 56.14101 — 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 56.14107 — Moving machine parts.** (3 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14107
- **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 56.20003 — 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 56.11001 — Safe access.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-J/section-56.11001
- **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

- **Addresses of Record:** 1 rows; 2012-12-01 through 2012-12-01; source ID `msha-addresses`
- **Assessed Violations:** 85 rows; 2007-05-31 through 2012-12-27; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 9 rows; 2011-11-18 through 2013-03-04; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 6 rows; 2012-01-18 through 2012-01-18; source ID `msha-conferences`
- **Contested Violations:** 9 rows; 2010-10-06 through 2011-10-25; source ID `msha-contested-violations`
- **Controller and Operator History:** 2 rows; 2007-02-26 through 2008-08-16; source ID `msha-controller-operator-history`
- **Inspections:** 20 rows; 2007-05-31 through 2012-12-27; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 24 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 6 rows; unknown through unknown; source ID `msha-mine-production-yearly`
- **Mines:** 1 rows; unknown through unknown; source ID `msha-mines`
- **Violations:** 85 rows; 2007-05-31 through 2012-12-27; 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-crusher-1-0405713`
- JSON: `/api/v1/mines/portable-crusher-1-0405713`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/0405713/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/0405713/relationships`
- MCP resource: `mine://0405713/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`