# Relationship history for MSHA mine 4609523

Current hierarchy: **Cleveland-Cliffs Inc → Twin State Mining, Inc. → MINE NO. 44**

- 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

- **controller_controls_mine:** William G  Skewes → MINE NO. 44; 2002-10-17 to 2008-10-19; source msha-controller-operator-history
- **controller_controls_mine:** Gregory  Jessee et al → MINE NO. 44; 2006-10-10 to 2008-12-04; source msha-controller-operator-history
- **controller_controls_mine:** ArcelorMittal → MINE NO. 44; 2008-10-20 to 2020-12-08; source msha-controller-operator-history
- **controller_controls_mine:** ArcelorMittal → MINE NO. 44; 2008-12-05 to 2020-12-08; source msha-controller-operator-history
- **operator_operates_mine:** XMV, Inc. → MINE NO. 44; 2016-12-16 to 2021-11-17; source msha-controller-operator-history
- **controller_controls_operator:** ArcelorMittal → XMV, Inc.; 2016-12-16 to 2020-12-08; source msha-controller-operator-history
- **controller_controls_operator:** William G  Skewes → XMV, Inc.; 2016-12-16 to 2008-10-19; source msha-controller-operator-history
- **controller_controls_mine:** Cleveland-Cliffs Inc → MINE NO. 44; 2020-12-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cleveland-Cliffs Inc → XMV, Inc.; 2020-12-09 to 2021-11-17; source msha-controller-operator-history
- **operator_operates_mine:** Twin State Mining, Inc. → MINE NO. 44; 2021-11-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gregory  Jessee et al → Twin State Mining, Inc.; 2021-11-18 to 2008-12-04; source msha-controller-operator-history
- **controller_controls_operator:** ArcelorMittal → Twin State Mining, Inc.; 2021-11-18 to 2020-12-08; source msha-controller-operator-history
- **controller_controls_operator:** Cleveland-Cliffs Inc → Twin State Mining, Inc.; 2021-11-18 to current/open; source msha-controller-operator-history