# Portable Plant #5

- **MSHA mine ID:** 4703788
- **Status:** Intermittent
- **Type / commodity:** Surface / Dimension Limestone
- **Location:** Rock, WI
- **Operator:** Bjoin Limestone Inc.
- **Controller:** Kristopher P  Bjoin; Shaun M  Bjoin; Jonathan M  Bjoin
- **Public source rows linked:** 62
- **Source coverage:** 8 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Kristopher P  Bjoin; Shaun M  Bjoin; Jonathan M  Bjoin (0129421) → Bjoin Limestone Inc. (L00393) → Portable Plant #5 (4703788)**

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

## Controller and operator valid-time history

- **Jonathan M  Bjoin → Bjoin Limestone Inc.:** 2016-08-31 through current/open; derived from co-tenure at mine 4703788; source `msha-controller-operator-history`.
- **Kristopher P  Bjoin → Bjoin Limestone Inc.:** 2016-08-31 through current/open; derived from co-tenure at mine 4703788; source `msha-controller-operator-history`.
- **Shaun M  Bjoin → Bjoin Limestone Inc.:** 2016-08-31 through current/open; derived from co-tenure at mine 4703788; source `msha-controller-operator-history`.
- **Kathleen M  Bjoin et al → Bjoin Limestone Inc.:** 2016-08-31 through 2014-04-30; derived from co-tenure at mine 4703788; source `msha-controller-operator-history`.

- History rows: 4
- Typed edges: 7
- Interval anomalies: 1
- 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 — 2 since 2021:** Violations and penalties 5 violation rows across the full record; 1 carry an S&S flag and $837 appears in current assessed amounts.
3. **HEALTH — 0 samples:** Occupational health samples No published samples. 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 0 employee hours and 0 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 — 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 — 6 since 2021:** Inspections 12 inspection events and 87 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 56.3131 — Pit or quarry wall perimeter.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-B/section-56.3131
- **30 CFR 47.44 — Temporary, portable containers.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-47/subpart-E/section-47.44
- **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

## Source coverage

- **Addresses of Record:** 1 rows; 2024-11-01 through 2024-11-01; source ID `msha-addresses`
- **Assessed Violations:** 5 rows; 2017-05-31 through 2023-05-24; source ID `msha-assessed-violations`
- **Controller and Operator History:** 4 rows; 2016-08-31 through 2016-08-31; source ID `msha-controller-operator-history`
- **Inspections:** 12 rows; 2016-08-31 through 2026-08-27; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 25 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 9 rows; unknown through unknown; source ID `msha-mine-production-yearly`
- **Mines:** 1 rows; unknown through unknown; source ID `msha-mines`
- **Violations:** 5 rows; 2017-05-31 through 2023-05-24; 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-plant-5-4703788`
- JSON: `/api/v1/mines/portable-plant-5-4703788`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/4703788/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/4703788/relationships`
- MCP resource: `mine://4703788/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`