# Relationship history for MSHA mine 1505062

Current hierarchy: **James  Garrison → Hardly Able Coal Company Inc → Prep Plant 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:** Kaneb Services Inc → Prep Plant No 1; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Liberty Coal Company → Prep Plant No 1; 1950-01-01 to 1976-02-02; source msha-controller-operator-history
- **controller_controls_mine:** Childers Spencer & Wesley → Prep Plant No 1; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Childers Spencer & Wesley → Liberty Coal Company; 1950-01-01 to 1976-02-02; source msha-controller-operator-history
- **controller_controls_mine:** James  Garrison → Prep Plant No 1; 1975-09-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Leeco Inc → Prep Plant No 1; 1976-02-03 to 1979-01-09; source msha-controller-operator-history
- **controller_controls_operator:** Kaneb Services Inc → Leeco Inc; 1976-02-03 to 1979-01-09; source msha-controller-operator-history
- **operator_operates_mine:** Hardly Able Coal Company Inc → Prep Plant No 1; 1979-01-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James  Garrison → Hardly Able Coal Company Inc; 1979-01-10 to current/open; source msha-controller-operator-history