# Portable Crusher #1

- **MSHA mine ID:** 4800529
- **Status:** Abandoned
- **Type / commodity:** Surface / Dimension Limestone
- **Location:** Albany, WY
- **Operator:** Mountain Cement Company LLC
- **Controller:** Eagle Materials Inc
- **Public source rows linked:** 705
- **Source coverage:** 15 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Eagle Materials Inc (M00946) → Mountain Cement Company LLC (L08533) → Portable Crusher #1 (4800529)**

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

## Controller and operator valid-time history

- **Monolith Portland Cement Company → Wyoming Construction Company:** 1950-01-01 through 1986-01-26; derived from co-tenure at mine 4800529; source `msha-controller-operator-history`.
- **Eagle Materials Inc → Mountain Cement Company LLC:** 1986-01-27 through current/open; derived from co-tenure at mine 4800529; 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 7 historical accident/injury rows; 0 coded fatalities and 311 lost days across the published record.
2. **COMPLIANCE — 1 since 2021:** Violations and penalties 18 violation rows across the full record; 3 carry an S&S flag and $1,852 appears in current assessed amounts.
3. **HEALTH — 5 samples:** Occupational health samples 4 personal; 1 area. 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 40 employee hours and 1 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 4 linked rows:** Contests, conferences and decisions 2 contested-violation rows, 2 civil-penalty docket/decision rows, and 0 conference records linked by issuance number.
6. **CONTRACTORS — 3 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 — 1 since 2021:** Inspections 18 inspection events and 207 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 56.14112 — 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
- **30 CFR 41.12 — Changes; notification by operator.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-G/part-41/subpart-B/section-41.12
- **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 56.12028 — 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 56.14107 — 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 56.9300 — 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 56.12019 — Access to stationary electrical equipment or switchgear.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12019
- **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 56.12023 — Guarding electrical connections and resistor grids.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12023
- **30 CFR 56.12032 — Inspection and cover plates.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12032
- **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

## Source coverage

- **Accident, Injuries, and Illnesses:** 7 rows; 2000-03-14 through 2014-07-17; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2021-06-29 through 2021-06-29; source ID `msha-addresses`
- **Metal and Nonmetal Area Samples:** 1 rows; 2016-12-21 through 2016-12-21; source ID `msha-area-samples`
- **Assessed Violations:** 18 rows; 2000-01-11 through 2021-03-04; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 2 rows; 2011-06-22 through 2011-06-22; source ID `msha-civil-penalty-dockets-decisions`
- **Contested Violations:** 2 rows; 2010-10-20 through 2010-10-20; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 441 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 116 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 2 rows; 1950-01-01 through 1986-01-27; source ID `msha-controller-operator-history`
- **Inspections:** 18 rows; 2000-01-11 through 2021-03-04; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 57 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 17 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:** 4 rows; 2004-03-24 through 2010-02-18; source ID `msha-personal-health-samples`
- **Violations:** 18 rows; 2000-01-11 through 2021-03-04; 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-1-4800529`
- JSON: `/api/v1/mines/portable-crusher-1-4800529`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/4800529/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/4800529/relationships`
- MCP resource: `mine://4800529/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`