# Portable Crusher #2

- **MSHA mine ID:** 1302138
- **Status:** Active
- **Type / commodity:** Surface / Crushed, Broken Limestone NEC
- **Location:** Appanoose, IA
- **Operator:** Cantera Aggregates, LLC.
- **Controller:** Joshua Corey  Kratofil
- **Public source rows linked:** 1,040
- **Source coverage:** 13 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Joshua Corey  Kratofil (0137721) → Cantera Aggregates, LLC. (0154593) → Portable Crusher #2 (1302138)**

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

## Controller and operator valid-time history

- **Darrell (Skip)  Bailey → L & W Construction Company:** 1986-03-01 through 1991-03-14; derived from co-tenure at mine 1302138; source `msha-controller-operator-history`.
- **Johnson Holding Company → L & W Quarries, Inc.:** 1991-03-15 through 2024-04-18; derived from co-tenure at mine 1302138; source `msha-controller-operator-history`.
- **Rasmussen Group Inc → L & W Quarries, Inc.:** 2024-04-19 through 2024-08-18; derived from co-tenure at mine 1302138; source `msha-controller-operator-history`.
- **Joshua Corey  Kratofil → Cantera Aggregates, LLC.:** 2024-08-19 through 2022-05-22; derived from co-tenure at mine 1302138; source `msha-controller-operator-history`.
- **Joshua Corey  Kratofil → Cantera Aggregates, LLC.:** 2024-08-19 through current/open; derived from co-tenure at mine 1302138; source `msha-controller-operator-history`.
- **Justin A Kratofil et al → Cantera Aggregates, LLC.:** 2024-08-19 through 2024-06-23; derived from co-tenure at mine 1302138; source `msha-controller-operator-history`.
- **Joshua C Kratofil et al → Cantera Aggregates, LLC.:** 2024-08-19 through 2024-06-23; derived from co-tenure at mine 1302138; source `msha-controller-operator-history`.

- History rows: 7
- Typed edges: 16
- Interval anomalies: 3
- 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 2 historical accident/injury rows; 0 coded fatalities and 0 lost days across the published record.
2. **COMPLIANCE — 34 since 2021:** Violations and penalties 217 violation rows across the full record; 53 carry an S&S flag and $90,821 appears in current assessed amounts.
3. **HEALTH — 49 samples:** Occupational health samples 49 personal. 4 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 7K employee hours and 11 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 82 linked rows:** Contests, conferences and decisions 29 contested-violation rows, 37 civil-penalty docket/decision rows, and 16 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 — 11 since 2021:** Inspections 76 inspection events and 1K 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 56.14107 — Moving machine parts.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14107
- **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 56.14132 — Horns and backup alarms.** (3 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14132
- **30 CFR 56.4101 — Warning signs.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4101
- **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 56.12028 — 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
- **30 CFR 56.11001 — Safe access.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-J/section-56.11001
- **30 CFR 56.4104 — Combustible waste.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4104
- **30 CFR 58.620 — Drill dust control.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-58/subpart-E/section-58.620

## Source coverage

- **Accident, Injuries, and Illnesses:** 2 rows; 2000-06-02 through 2007-03-16; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2023-10-02 through 2023-10-02; source ID `msha-addresses`
- **Assessed Violations:** 215 rows; 2000-01-11 through 2025-12-17; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 37 rows; 2002-12-05 through 2022-09-20; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 16 rows; 2002-05-17 through 2002-05-17; source ID `msha-conferences`
- **Contested Violations:** 29 rows; 2007-09-05 through 2021-11-29; source ID `msha-contested-violations`
- **Controller and Operator History:** 7 rows; 1986-03-01 through 2024-08-19; source ID `msha-controller-operator-history`
- **Inspections:** 76 rows; 2000-01-11 through 2026-09-09; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 311 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 79 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:** 49 rows; 2003-05-06 through 2026-09-09; source ID `msha-personal-health-samples`
- **Violations:** 217 rows; 2000-01-11 through 2025-12-17; 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-2-1302138`
- JSON: `/api/v1/mines/portable-crusher-2-1302138`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/1302138/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/1302138/relationships`
- MCP resource: `mine://1302138/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`