# Relationship history for MSHA mine 4608647

Current hierarchy: **Cleveland-Cliffs Inc → Extra Energy, Inc. → Eckman Surface 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

- **controller_controls_mine:** Steven W  Haynes et al → Eckman Surface Mine; 1989-11-01 to 2008-09-15; source msha-controller-operator-history
- **operator_operates_mine:** Cf & B Coal Works Inc → Eckman Surface Mine; 1997-06-01 to 1999-11-16; source msha-controller-operator-history
- **controller_controls_mine:** Carl  Blevins → Eckman Surface Mine; 1997-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Carl  Blevins → Cf & B Coal Works Inc; 1997-06-01 to 1999-11-16; source msha-controller-operator-history
- **controller_controls_mine:** Horizon Natural Resources Incorporated → Eckman Surface Mine; 1997-11-05 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Premium Processing Inc → Eckman Surface Mine; 1999-11-17 to 2004-06-10; source msha-controller-operator-history
- **controller_controls_operator:** Horizon Natural Resources Incorporated → Premium Processing Inc; 1999-11-17 to 2004-06-10; source msha-controller-operator-history
- **operator_operates_mine:** Extra Energy, Inc. → Eckman Surface Mine; 2004-06-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Steven W  Haynes et al → Extra Energy, Inc.; 2004-06-11 to 2008-09-15; source msha-controller-operator-history
- **controller_controls_mine:** ArcelorMittal → Eckman Surface Mine; 2008-09-16 to 2020-12-08; source msha-controller-operator-history
- **controller_controls_operator:** ArcelorMittal → Extra Energy, Inc.; 2008-09-16 to 2020-12-08; source msha-controller-operator-history
- **controller_controls_mine:** Cleveland-Cliffs Inc → Eckman Surface Mine; 2020-12-09 to current/open; 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