# Relationship history for MSHA mine 4603136

Current hierarchy: **Sev.en Global Investments a.s. → Rockwell Mining, LLC. → Wharton 3A**

- 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

- **operator_operates_mine:** Eastern Associated Coal Corp → Wharton 3A; 1950-01-01 to 1987-05-14; source msha-controller-operator-history
- **controller_controls_mine:** Eastern Gas & Fuel Association → Wharton 3A; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Eastern Gas & Fuel Association → Eastern Associated Coal Corp; 1950-01-01 to 1987-05-14; source msha-controller-operator-history
- **controller_controls_mine:** Hanson PLC → Wharton 3A; 1987-04-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Eastern Associated Coal Corp → Wharton 3A; 1987-05-15 to 2022-05-04; source msha-controller-operator-history
- **controller_controls_operator:** Hanson PLC → Eastern Associated Coal Corp; 1987-05-15 to 2022-05-04; source msha-controller-operator-history
- **controller_controls_mine:** Blackhawk Mining LLC → Wharton 3A; 2015-10-26 to 2020-05-31; source msha-controller-operator-history
- **controller_controls_mine:** Sev.en Global Investments a.s. → Wharton 3A; 2020-06-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Rockwell Mining, LLC. → Wharton 3A; 2022-05-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Blackhawk Mining LLC → Rockwell Mining, LLC.; 2022-05-05 to 2020-05-31; source msha-controller-operator-history
- **controller_controls_operator:** Sev.en Global Investments a.s. → Rockwell Mining, LLC.; 2022-05-05 to current/open; source msha-controller-operator-history