# Relationship history for MSHA mine 4605117

Current hierarchy: **Hanson PLC → Peabody Coal Company → Mine #22**

- 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:** Eagle Coal & Dock Company Inc → Mine #22; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Armco Inc → Mine #22; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Hanson PLC → Mine #22; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Eagle Coal & Dock Company Inc → Mine #22; 1976-04-20 to 1980-01-09; source msha-controller-operator-history
- **controller_controls_operator:** Eagle Coal & Dock Company Inc → Eagle Coal & Dock Company Inc; 1976-04-20 to 1980-01-09; source msha-controller-operator-history
- **operator_operates_mine:** Armco Inc → Mine #22; 1980-01-10 to 1984-02-26; source msha-controller-operator-history
- **controller_controls_operator:** Armco Inc → Armco Inc; 1980-01-10 to 1984-02-26; source msha-controller-operator-history
- **operator_operates_mine:** Peabody Coal Company → Mine #22; 1984-02-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hanson PLC → Peabody Coal Company; 1984-02-27 to current/open; source msha-controller-operator-history