# Relationship history for MSHA mine 2103403

Current hierarchy: **Cleveland-Cliffs Inc → United Taconite LLC → United - Mine**

- 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:** United Taconite LLC → United - Mine; 2003-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Laiwu Steel et al → United - Mine; 2003-12-01 to 2010-02-21; source msha-controller-operator-history
- **controller_controls_operator:** Laiwu Steel et al → United Taconite LLC; 2003-12-01 to 2010-02-21; source msha-controller-operator-history
- **controller_controls_operator:** Cleveland Cliffs Inc et al → United Taconite LLC; 2003-12-01 to 2010-02-21; source msha-controller-operator-history
- **controller_controls_mine:** Cleveland-Cliffs Inc → United - Mine; 2010-02-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cleveland-Cliffs Inc → United Taconite LLC; 2010-02-22 to current/open; source msha-controller-operator-history