# PORTABLE CRUSHER

- **MSHA mine ID:** 0503450
- **Status:** Abandoned
- **Type / commodity:** Surface / Construction Sand and Gravel
- **Location:** Montrose, CO
- **Operator:** Black Canyon Aggregate Inc
- **Controller:** Ronald Chauncey  Luttrell
- **Public source rows linked:** 395
- **Source coverage:** 12 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Ronald Chauncey  Luttrell (M09972) → Black Canyon Aggregate Inc (L13039) → PORTABLE CRUSHER (0503450)**

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

## Controller and operator valid-time history

- **C E  Mills → C E Mills Construction Company Inc:** 1979-01-01 through 1993-01-31; derived from co-tenure at mine 0503450; source `msha-controller-operator-history`.
- **Ronald Chauncey  Luttrell → Black Canyon Aggregate Inc:** 1993-02-01 through current/open; derived from co-tenure at mine 0503450; 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 79 violation rows across the full record; 18 carry an S&S flag and $7,464 appears in current assessed amounts.
3. **HEALTH — 13 samples:** Occupational health samples 13 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 970 employee hours and 3 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 59 linked rows:** Contests, conferences and decisions 21 contested-violation rows, 21 civil-penalty docket/decision rows, and 17 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 31 inspection events and 406 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 56.20008 — Toilet facilities.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-S/section-56.20008
- **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 56.12032 — Inspection and cover plates.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12032
- **30 CFR 56.14109 — Unguarded conveyors with adjacent travelways.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14109
- **30 CFR 56.11012 — Protection for openings around travelways.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-J/section-56.11012
- **30 CFR 56.12008 — Insulation and fittings for power wires and cables.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12008
- **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 56.4602 — Gauges and regulators.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4602
- **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 56.14107 — 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 56.14112 — 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

- **Addresses of Record:** 1 rows; 2019-01-01 through 2019-01-01; source ID `msha-addresses`
- **Assessed Violations:** 79 rows; 2000-07-12 through 2017-04-25; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 21 rows; 2009-01-12 through 2017-10-18; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 17 rows; 2007-07-09 through 2007-07-09; source ID `msha-conferences`
- **Contested Violations:** 21 rows; 2007-05-10 through 2017-04-25; source ID `msha-contested-violations`
- **Controller and Operator History:** 2 rows; 1979-01-01 through 1993-02-01; source ID `msha-controller-operator-history`
- **Inspections:** 31 rows; 2000-02-23 through 2017-04-24; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 110 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 20 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:** 13 rows; 2003-05-15 through 2016-08-24; source ID `msha-personal-health-samples`
- **Violations:** 79 rows; 2000-07-12 through 2017-04-25; 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-0503450`
- JSON: `/api/v1/mines/portable-crusher-0503450`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/0503450/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/0503450/relationships`
- MCP resource: `mine://0503450/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`