# Relationship history for MSHA mine 4606472

Current hierarchy: **Robert R  Jeran → Roblee Coal Company → Stewarts Run No 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:** Anker Group Inc → Stewarts Run No 1; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** King Knob Coal Company Inc → Stewarts Run No 1; 1982-01-01 to 1983-08-07; source msha-controller-operator-history
- **controller_controls_operator:** Anker Group Inc → King Knob Coal Company Inc; 1982-01-01 to 1983-08-07; source msha-controller-operator-history
- **operator_operates_mine:** Roblee Coal Company → Stewarts Run No 1; 1983-08-08 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Robert R  Jeran → Stewarts Run No 1; 1983-08-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert R  Jeran → Roblee Coal Company; 1983-08-08 to current/open; source msha-controller-operator-history