# Portable Crushing Plant #205

- **MSHA mine ID:** 1302076
- **Status:** Intermittent
- **Type / commodity:** Surface / Crushed, Broken Limestone NEC
- **Location:** Black Hawk, IA
- **Operator:** BMC Aggregates LC
- **Controller:** Manatts Enterprises; Cedar Valley Corp
- **Public source rows linked:** 975
- **Source coverage:** 15 / 20
- **Generated:** 2026-10-18T09:31:49.615Z

## Current entity hierarchy

**Manatts Enterprises; Cedar Valley Corp (M04838) → BMC Aggregates LC (0076763) → Portable Crushing Plant #205 (1302076)**

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

## Controller and operator valid-time history

- **Cedar Valley Corp  et al → Basic Materials Corp:** 1985-07-01 through 2006-07-31; derived from co-tenure at mine 1302076; source `msha-controller-operator-history`.
- **Manatts Enterprises et al → Basic Materials Corp:** 1985-07-01 through 2006-07-31; derived from co-tenure at mine 1302076; source `msha-controller-operator-history`.
- **Cedar Valley Corp  et al → BMC Aggregates LC:** 2006-08-01 through current/open; derived from co-tenure at mine 1302076; source `msha-controller-operator-history`.
- **Manatts Enterprises et al → BMC Aggregates LC:** 2006-08-01 through current/open; derived from co-tenure at mine 1302076; source `msha-controller-operator-history`.

- History rows: 4
- Typed edges: 8
- 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: 2026-10-18T09:31:49.615908+00:00.

## Assessment signals

1. **SAFETY — 3 since 2021:** Accidents and injuries 19 historical accident/injury rows; 0 coded fatalities and 169 lost days across the published record.
2. **COMPLIANCE — 17 since 2021:** Violations and penalties 89 violation rows across the full record; 22 carry an S&S flag and $14,463 appears in current assessed amounts.
3. **HEALTH — 27 samples:** Occupational health samples 27 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 6K employee hours and 11 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 25 linked rows:** Contests, conferences and decisions 5 contested-violation rows, 5 civil-penalty docket/decision rows, and 15 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 — 7 since 2021:** Inspections 42 inspection events and 501 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 56.14101 — 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 56.11027 — Scaffolds and working platforms.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-J/section-56.11027
- **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 56.12004 — Electrical conductors.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12004
- **30 CFR 56.12018 — Identification of power switches.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12018
- **30 CFR 56.11002 — Handrails and toeboards.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-J/section-56.11002
- **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 46.9 — Records of training.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-46/section-46.9
- **30 CFR 56.4201 — Inspection.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4201

## Source coverage

- **Accident, Injuries, and Illnesses:** 19 rows; 2000-06-05 through 2026-03-25; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2025-04-16 through 2025-04-16; source ID `msha-addresses`
- **Assessed Violations:** 89 rows; 2000-08-02 through 2026-04-08; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 5 rows; 2012-05-24 through 2016-10-12; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 15 rows; 2004-01-07 through 2016-04-20; source ID `msha-conferences`
- **Contested Violations:** 5 rows; 2011-03-15 through 2016-03-22; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 298 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 75 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 4 rows; 1985-07-01 through 2006-08-01; source ID `msha-controller-operator-history`
- **Inspections:** 42 rows; 2000-08-02 through 2026-04-08; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 251 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 54 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:** 27 rows; 2003-06-10 through 2026-04-09; source ID `msha-personal-health-samples`
- **Violations:** 89 rows; 2000-08-02 through 2026-04-08; 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-crushing-plant-205-1302076`
- JSON: `/api/v1/mines/portable-crushing-plant-205-1302076`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/1302076/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/1302076/relationships`
- MCP resource: `mine://1302076/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`