# Relationship history for MSHA mine 1504055

Current hierarchy: **Akers Teddy Ray → J & L Coals Inc → No I-201**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Ligon Preparation Company → No I-201; 1950-01-01 to 1985-07-23; source msha-controller-operator-history
- **controller_controls_mine:** Hope Mining Company → No I-201; 1950-01-01 to 1985-07-23; source msha-controller-operator-history
- **controller_controls_operator:** Hope Mining Company → Ligon Preparation Company; 1950-01-01 to 1985-07-23; source msha-controller-operator-history
- **operator_operates_mine:** J & L Coals Inc → No I-201; 1985-07-24 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Akers Teddy Ray → No I-201; 1985-07-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Akers Teddy Ray → J & L Coals Inc; 1985-07-24 to current/open; source msha-controller-operator-history