# Mesabi Nugget, LLC

- **MSHA mine ID:** 2103340
- **Status:** Abandoned
- **Type / commodity:** Facility / Iron Ore
- **Location:** Lake, MN
- **Operator:** Mesabi Nugget, LLC
- **Controller:** Iron Units LLC; Ferrous Resources LLC; Kobe Iron Nuggett LLC; Ferrometri
- **Public source rows linked:** 95
- **Source coverage:** 10 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Iron Units LLC; Ferrous Resources LLC; Kobe Iron Nuggett LLC; Ferrometri (0041207) → Mesabi Nugget, LLC (0050876) → Mesabi Nugget, LLC (2103340)**

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

## Controller and operator valid-time history

- **Ferrous Resources LLC  et al → Mesabi Nugget, LLC:** 2002-12-11 through current/open; derived from co-tenure at mine 2103340; source `msha-controller-operator-history`.
- **Ferrometrics Inc  et al → Mesabi Nugget, LLC:** 2002-12-11 through current/open; derived from co-tenure at mine 2103340; source `msha-controller-operator-history`.
- **Kobe Iron Nuggett LLC  et al → Mesabi Nugget, LLC:** 2002-12-11 through current/open; derived from co-tenure at mine 2103340; source `msha-controller-operator-history`.
- **Iron Units LLC  et al → Mesabi Nugget, LLC:** 2002-12-11 through current/open; derived from co-tenure at mine 2103340; source `msha-controller-operator-history`.

- History rows: 4
- 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 0 historical accident/injury rows; 0 coded fatalities and 0 lost days across the published record.
2. **COMPLIANCE — 0 since 2021:** Violations and penalties 13 violation rows across the full record; 1 carry an S&S flag and $833 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 — 1 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 3 inspection events and 91 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 56.4011 — Abandoned electric circuits.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4011
- **30 CFR 56.4201 — Inspection.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4201
- **30 CFR 56.16006 — Protection of gas cylinder valves.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-O/section-56.16006
- **30 CFR 56.4603 — Closure of valves.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4603
- **30 CFR 56.12032 — Inspection and cover plates.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12032
- **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 56.14115 — Stationary grinding machines.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14115
- **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 56.18002 — Examination of working places.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-Q/section-56.18002
- **30 CFR 56.12004 — Electrical conductors.** (1 retained recent row) — 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; 2004-08-12 through 2004-08-12; source ID `msha-addresses`
- **Assessed Violations:** 13 rows; 2003-03-26 through 2004-03-24; source ID `msha-assessed-violations`
- **Contractor Employment and Production — Quarterly:** 39 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 12 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 4 rows; 2002-12-11 through 2002-12-11; source ID `msha-controller-operator-history`
- **Inspections:** 3 rows; 2003-03-26 through 2004-03-22; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 7 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 2 rows; unknown through unknown; source ID `msha-mine-production-yearly`
- **Mines:** 1 rows; unknown through unknown; source ID `msha-mines`
- **Violations:** 13 rows; 2003-03-26 through 2004-03-24; 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/mesabi-nugget-llc-2103340`
- JSON: `/api/v1/mines/mesabi-nugget-llc-2103340`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/2103340/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/2103340/relationships`
- MCP resource: `mine://2103340/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`