# Crusher 3

- **MSHA mine ID:** 0504593
- **Status:** Intermittent
- **Type / commodity:** Surface / Construction Sand and Gravel
- **Location:** Emery, UT
- **Operator:** Elam Sand and Gravel
- **Controller:** Summit Materials LLC
- **Public source rows linked:** 502
- **Source coverage:** 13 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Summit Materials LLC (M02046) → Elam Sand and Gravel (L01838) → Crusher 3 (0504593)**

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

## Controller and operator valid-time history

- **Harold  Elam → Elam Sand and Gravel:** 1997-05-01 through 2011-03-31; derived from co-tenure at mine 0504593; source `msha-controller-operator-history`.
- **Summit Materials LLC → Elam Sand and Gravel:** 2011-04-01 through current/open; derived from co-tenure at mine 0504593; 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 4 historical accident/injury rows; 0 coded fatalities and 21 lost days across the published record.
2. **COMPLIANCE — 11 since 2021:** Violations and penalties 53 violation rows across the full record; 11 carry an S&S flag and $7,290 appears in current assessed amounts.
3. **HEALTH — 23 samples:** Occupational health samples 19 personal; 4 area. 1 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 5K employee hours and 9 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 0 linked rows:** Contests, conferences and decisions 0 contested-violation rows, 0 civil-penalty docket/decision rows, and 0 conference records linked by issuance number.
6. **CONTRACTORS — 2 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 — 12 since 2021:** Inspections 39 inspection events and 593 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 56.12008 — Insulation and fittings for power wires and cables.** (4 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12008
- **30 CFR 56.12004 — Electrical conductors.** (3 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12004
- **30 CFR 56.14101 — Brakes.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14101
- **30 CFR 62.170 — Audiometric testing.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-M/part-62/section-62.170
- **30 CFR 56.12013 — Splices and repairs of power cables.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12013
- **30 CFR 56.16005 — Securing gas cylinders.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-O/section-56.16005

## Source coverage

- **Accident, Injuries, and Illnesses:** 4 rows; 2002-06-19 through 2026-02-20; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2026-07-29 through 2026-07-29; source ID `msha-addresses`
- **Metal and Nonmetal Area Samples:** 4 rows; 2015-10-07 through 2017-03-22; source ID `msha-area-samples`
- **Assessed Violations:** 53 rows; 2000-09-27 through 2025-02-26; source ID `msha-assessed-violations`
- **Contractor Employment and Production — Quarterly:** 66 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 11 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 2 rows; 1997-05-01 through 1997-05-01; source ID `msha-controller-operator-history`
- **Inspections:** 39 rows; 2000-09-26 through 2026-06-09; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 205 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 44 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:** 19 rows; 2006-08-09 through 2025-05-28; source ID `msha-personal-health-samples`
- **Violations:** 53 rows; 2000-09-27 through 2025-02-26; 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/crusher-3-0504593`
- JSON: `/api/v1/mines/crusher-3-0504593`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/0504593/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/0504593/relationships`
- MCP resource: `mine://0504593/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`