# Relationship history for MSHA mine 2100256

Current hierarchy: **Cleveland-Cliffs Inc → Cleveland Cliffs Inc → Cliffs Erie, LLC.**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Erie Mining Company → Cliffs Erie, LLC.; 1950-01-01 to 1987-04-30; source msha-controller-operator-history
- **controller_controls_mine:** Bethlehem Steel Corp-Et Al → Cliffs Erie, LLC.; 1950-01-01 to 1987-04-30; source msha-controller-operator-history
- **controller_controls_operator:** Bethlehem Steel Corp-Et Al → Erie Mining Company; 1950-01-01 to 1987-04-30; source msha-controller-operator-history
- **operator_operates_mine:** LTV Steel Mining Company → Cliffs Erie, LLC.; 1987-05-01 to 2004-08-31; source msha-controller-operator-history
- **controller_controls_mine:** LTV Corp → Cliffs Erie, LLC.; 1987-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** LTV Corp → LTV Steel Mining Company; 1987-05-01 to 2004-08-31; source msha-controller-operator-history
- **operator_operates_mine:** Cleveland Cliffs Inc → Cliffs Erie, LLC.; 2004-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Cleveland-Cliffs Inc → Cliffs Erie, LLC.; 2004-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cleveland-Cliffs Inc → Cleveland Cliffs Inc; 2004-09-01 to current/open; source msha-controller-operator-history