# J-Plant (Portable)

- **MSHA mine ID:** 1301514
- **Status:** Abandoned
- **Type / commodity:** Surface / Crushed, Broken Limestone NEC
- **Location:** Des Moines, IA
- **Operator:** Cessford Construction Co
- **Controller:** CRH PLC
- **Public source rows linked:** 248
- **Source coverage:** 13 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**CRH PLC (M06183) → Cessford Construction Co (0085824) → J-Plant (Portable) (1301514)**

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

## Controller and operator valid-time history

- **Medusa Corp → Raid Quarries Division:** 1950-01-01 through 1978-12-31; derived from co-tenure at mine 1301514; source `msha-controller-operator-history`.
- **Crane Company → Medusa Aggregates Company:** 1979-01-01 through 1980-10-06; derived from co-tenure at mine 1301514; source `msha-controller-operator-history`.
- **Heidi Cessford  Krabbe et al → Cessford Construction Company:** 1980-10-07 through 2007-08-23; derived from co-tenure at mine 1301514; source `msha-controller-operator-history`.
- **CRH PLC → Cessford Construction Company:** 2007-08-24 through 2008-01-08; derived from co-tenure at mine 1301514; source `msha-controller-operator-history`.
- **CRH PLC → Cessford Construction Co:** 2008-01-09 through current/open; derived from co-tenure at mine 1301514; source `msha-controller-operator-history`.

- History rows: 5
- Typed edges: 14
- 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 9 historical accident/injury rows; 0 coded fatalities and 27 lost days across the published record.
2. **COMPLIANCE — 0 since 2021:** Violations and penalties 35 violation rows across the full record; 8 carry an S&S flag and $3,153 appears in current assessed amounts.
3. **HEALTH — 11 samples:** Occupational health samples 11 personal. 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 1K employee hours and 2 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 6 linked rows:** Contests, conferences and decisions 1 contested-violation rows, 1 civil-penalty docket/decision rows, and 4 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 22 inspection events and 285 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 56.14100 — Safety defects; examination, correction and records.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14100
- **30 CFR 56.9301 — Dump site restraints.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-H/section-56.9301
- **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 62.120 — Action level.** (3 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-M/part-62/section-62.120
- **30 CFR 56.14205 — Machinery, equipment, and tools.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14205
- **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 56.14206 — Securing movable parts.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14206
- **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 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

## Source coverage

- **Accident, Injuries, and Illnesses:** 9 rows; 2000-04-04 through 2005-06-20; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2008-08-01 through 2008-08-01; source ID `msha-addresses`
- **Assessed Violations:** 35 rows; 2000-07-31 through 2008-03-25; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 1 rows; 2009-02-12 through 2009-02-12; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 4 rows; 2000-08-14 through 2007-05-23; source ID `msha-conferences`
- **Contested Violations:** 1 rows; 2008-03-25 through 2008-03-25; source ID `msha-contested-violations`
- **Controller and Operator History:** 5 rows; 1950-01-01 through 2008-01-09; source ID `msha-controller-operator-history`
- **Inspections:** 22 rows; 2000-07-31 through 2008-03-25; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 101 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 22 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:** 11 rows; 2003-08-13 through 2007-05-16; source ID `msha-personal-health-samples`
- **Violations:** 35 rows; 2000-07-31 through 2008-03-25; 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/j-plant-portable-1301514`
- JSON: `/api/v1/mines/j-plant-portable-1301514`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/1301514/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/1301514/relationships`
- MCP resource: `mine://1301514/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`