# Portable LJ 54 Cone

- **MSHA mine ID:** 2102374
- **Status:** Intermittent
- **Type / commodity:** Surface / Construction Sand and Gravel
- **Location:** Douglas, MN
- **Operator:** Central Specialties Inc
- **Controller:** Central Specialties, Inc.
- **Public source rows linked:** 395
- **Source coverage:** 10 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Central Specialties, Inc. (0190500) → Central Specialties Inc (L15147) → Portable LJ 54 Cone (2102374)**

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

## Controller and operator valid-time history

- **Myrtle A  Starry → Starry Construction Company Inc:** 1950-01-01 through 1982-12-20; derived from co-tenure at mine 2102374; source `msha-controller-operator-history`.
- **Steve  Minnerath → Starry Construction Company Inc:** 1982-12-21 through 1997-04-22; derived from co-tenure at mine 2102374; source `msha-controller-operator-history`.
- **Joe  Minnerath et al → Central Specialties Inc:** 1997-04-23 through 2021-01-05; derived from co-tenure at mine 2102374; source `msha-controller-operator-history`.
- **Allan  Minnerath → Central Specialties Inc:** 2021-01-06 through 2024-01-01; derived from co-tenure at mine 2102374; source `msha-controller-operator-history`.
- **Central Specialties, Inc. → Central Specialties Inc:** 2024-01-02 through current/open; derived from co-tenure at mine 2102374; source `msha-controller-operator-history`.

- History rows: 5
- Typed edges: 13
- 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 10 historical accident/injury rows; 0 coded fatalities and 178 lost days across the published record.
2. **COMPLIANCE — 10 since 2021:** Violations and penalties 33 violation rows across the full record; 2 carry an S&S flag and $4,087 appears in current assessed amounts.
3. **HEALTH — 10 samples:** Occupational health samples 10 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 704 employee hours and 4 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 — 7 since 2021:** Inspections 37 inspection events and 337 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 50.30 — Preparation and submission of MSHA Form 7000-2—Quarterly Employment and Coal Production Report.** (4 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-I/part-50/subpart-D/section-50.30
- **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 56.14107 — Moving machine parts.** (3 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14107
- **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 56.12018 — 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

## Source coverage

- **Accident, Injuries, and Illnesses:** 10 rows; 2000-10-16 through 2022-05-11; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 1988-08-04 through 1988-08-04; source ID `msha-addresses`
- **Assessed Violations:** 33 rows; 2004-04-12 through 2025-07-30; source ID `msha-assessed-violations`
- **Controller and Operator History:** 5 rows; 1950-01-01 through 1997-04-23; source ID `msha-controller-operator-history`
- **Inspections:** 37 rows; 2002-05-13 through 2026-08-20; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 211 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:** 10 rows; 2002-05-14 through 2021-05-25; source ID `msha-personal-health-samples`
- **Violations:** 33 rows; 2004-04-12 through 2025-07-30; 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-lj-54-cone-2102374`
- JSON: `/api/v1/mines/portable-lj-54-cone-2102374`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/2102374/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/2102374/relationships`
- MCP resource: `mine://2102374/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`