# Relationship history for MSHA mine 4606893

Current hierarchy: **Hanson PLC → Eastern Associated Coal Corp → Jasper Workman Loadout Facility**

- 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:** Eastern Gas & Fuel Association → Jasper Workman Loadout Facility; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Eastern Associated Coal Corp → Jasper Workman Loadout Facility; 1985-01-01 to 1987-05-14; source msha-controller-operator-history
- **controller_controls_operator:** Eastern Gas & Fuel Association → Eastern Associated Coal Corp; 1985-01-01 to 1987-05-14; source msha-controller-operator-history
- **controller_controls_mine:** Hanson PLC → Jasper Workman Loadout Facility; 1987-04-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Eastern Associated Coal Corp → Jasper Workman Loadout Facility; 1987-05-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hanson PLC → Eastern Associated Coal Corp; 1987-05-15 to current/open; source msha-controller-operator-history