# Relationship history for MSHA mine 4609182

Current hierarchy: **Cleveland-Cliffs Inc → Extra Energy, Inc → Highwall Miner #1**

- 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:** Steven W  Haynes et al → Highwall Miner #1; 1989-11-01 to 2008-09-15; source msha-controller-operator-history
- **operator_operates_mine:** Twin State Mining Inc → Highwall Miner #1; 2006-10-10 to 2016-11-30; source msha-controller-operator-history
- **controller_controls_mine:** Gregory  Jessee et al → Highwall Miner #1; 2006-10-10 to 2008-12-04; source msha-controller-operator-history
- **controller_controls_operator:** Gregory  Jessee et al → Twin State Mining Inc; 2006-10-10 to 2008-12-04; source msha-controller-operator-history
- **controller_controls_mine:** ArcelorMittal → Highwall Miner #1; 2008-09-16 to 2020-12-08; source msha-controller-operator-history
- **controller_controls_mine:** ArcelorMittal → Highwall Miner #1; 2008-12-05 to 2020-12-08; source msha-controller-operator-history
- **controller_controls_operator:** ArcelorMittal → Twin State Mining Inc; 2008-12-05 to 2016-11-30; source msha-controller-operator-history
- **operator_operates_mine:** Extra Energy, Inc → Highwall Miner #1; 2016-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** ArcelorMittal → Extra Energy, Inc; 2016-12-01 to 2020-12-08; source msha-controller-operator-history
- **controller_controls_operator:** Steven W  Haynes et al → Extra Energy, Inc; 2016-12-01 to 2008-09-15; source msha-controller-operator-history
- **controller_controls_mine:** Cleveland-Cliffs Inc → Highwall Miner #1; 2020-12-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cleveland-Cliffs Inc → Twin State Mining Inc; 2020-12-09 to 2016-11-30; source msha-controller-operator-history
- **controller_controls_operator:** Cleveland-Cliffs Inc → Extra Energy, Inc; 2020-12-09 to current/open; source msha-controller-operator-history