# Relationship history for MSHA mine 4609378

Current hierarchy: **Cleveland-Cliffs Inc → XMV, Inc. → Mine No. 42**

- 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. 42; 2002-10-17 to 2008-10-19; source msha-controller-operator-history
- **controller_controls_mine:** ArcelorMittal → Mine No. 42; 2008-10-20 to 2020-12-08; source msha-controller-operator-history
- **operator_operates_mine:** XMV, Inc. → Mine No. 42; 2010-08-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** ArcelorMittal → XMV, Inc.; 2010-08-10 to 2020-12-08; source msha-controller-operator-history
- **controller_controls_operator:** William G  Skewes → XMV, Inc.; 2010-08-10 to 2008-10-19; source msha-controller-operator-history
- **controller_controls_mine:** Cleveland-Cliffs Inc → Mine No. 42; 2020-12-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cleveland-Cliffs Inc → XMV, Inc.; 2020-12-09 to current/open; source msha-controller-operator-history