# Relationship history for MSHA mine 4606448

Current hierarchy: **Sev.en Global Investments a.s. → Rockwell Mining LLC → Rocklick Preparation Plant**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Eastern Gas & Fuel Association → Rocklick Preparation Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Eastern Associated Coal Corp → Rocklick Preparation Plant; 1981-11-01 to 1987-05-14; source msha-controller-operator-history
- **controller_controls_operator:** Eastern Gas & Fuel Association → Eastern Associated Coal Corp; 1981-11-01 to 1987-05-14; source msha-controller-operator-history
- **controller_controls_mine:** Hanson PLC → Rocklick Preparation Plant; 1987-04-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Eastern Associated Coal Corp → Rocklick Preparation Plant; 1987-05-15 to 1998-05-18; source msha-controller-operator-history
- **controller_controls_operator:** Hanson PLC → Eastern Associated Coal Corp; 1987-05-15 to 1998-05-18; source msha-controller-operator-history
- **controller_controls_mine:** Peabody Energy Corporation → Rocklick Preparation Plant; 1998-03-26 to 2007-10-30; source msha-controller-operator-history
- **operator_operates_mine:** Eastern Associated Coal LLC → Rocklick Preparation Plant; 1998-05-19 to 2015-10-25; source msha-controller-operator-history
- **controller_controls_operator:** Peabody Energy Corporation → Eastern Associated Coal LLC; 1998-05-19 to 2007-10-30; source msha-controller-operator-history
- **controller_controls_mine:** Patriot Coal Corporation → Rocklick Preparation Plant; 2007-10-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Patriot Coal Corporation → Eastern Associated Coal LLC; 2007-10-31 to 2015-10-25; source msha-controller-operator-history
- **operator_operates_mine:** Rockwell Mining LLC → Rocklick Preparation Plant; 2015-10-26 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Blackhawk Mining LLC → Rocklick Preparation Plant; 2015-10-26 to 2020-05-31; source msha-controller-operator-history
- **controller_controls_operator:** Blackhawk Mining LLC → Rockwell Mining LLC; 2015-10-26 to 2020-05-31; source msha-controller-operator-history
- **controller_controls_mine:** Sev.en Global Investments a.s. → Rocklick Preparation Plant; 2020-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Sev.en Global Investments a.s. → Rockwell Mining LLC; 2020-06-01 to current/open; source msha-controller-operator-history