---
schema_version: "secwatch.filing_event.v1"
accession: "0001558370-22-010922"
form_type: "8-K"
ticker: "MSB"
cik: "0000065172"
company_name: "MESABI TRUST"
filed_at: "2022-07-22T23:59:59+00:00"
generated_at: "2026-06-24T09:42:42.380945+00:00"
event_type: "other_material"
sentiment: "negative"
materiality_score: 0.9
calibrated_materiality_score: 0.9
confidence: "high"
source: SEC EDGAR
---

# Cliffs extends Northshore Mine idle to at least April 2023; Mesabi Trust royalties at risk

## Summary
- Cliffs CEO said Northshore Mine will remain idle until at least April 2023, announced on July 22, 2022 earnings call.
- Idling due to increased scrap use from FPT acquisition; pellets not needed, avoiding depletion for Mesabi Trust unit holders.
- Cliffs has not notified Mesabi Trust of these changes nor requested any royalty structure amendments.
- Any royalty agreement changes require Trustee approval and 66 2/3% of Trust Certificate Holders.
- This extends prior idling: Oct 2021 shift to Minorca, Feb 2022 idle through fall 2022.

## SEC filing metadata
- accession: 0001558370-22-010922
- form_type: 8-K
- ticker: MSB
- cik: 0000065172
- company_name: MESABI TRUST
- filed_at: 2022-07-22T23:59:59+00:00
- event_type: other_material
- sentiment: negative
- materiality_score: 0.9
- calibrated_materiality_score: 0.9
- confidence: high
- sec_items: 7.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/65172/000155837022010922/0001558370-22-010922-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/65172/000155837022010922/msb-20220722x8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001558370-22-010922
- JSON: https://secwatch.observer/filing/0001558370-22-010922.json
- Plain text: https://secwatch.observer/filing/0001558370-22-010922.txt

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.