# Relationship history for MSHA mine 1514635

Current hierarchy: **Baker Harold Glenn-Robert L Cox → A & G Coal Company → No 1 Mine**

- 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:** Meeks Alvin E & Edgar Allen King → No 1 Mine; 1977-10-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** K & M Coal Company Inc → No 1 Mine; 1984-05-01 to 1988-04-13; source msha-controller-operator-history
- **controller_controls_operator:** Meeks Alvin E & Edgar Allen King → K & M Coal Company Inc; 1984-05-01 to 1988-04-13; source msha-controller-operator-history
- **operator_operates_mine:** A & G Coal Company → No 1 Mine; 1988-04-14 to 1989-03-23; source msha-controller-operator-history
- **controller_controls_mine:** King David Et Al → No 1 Mine; 1988-04-14 to 1989-03-23; source msha-controller-operator-history
- **controller_controls_operator:** King David Et Al → A & G Coal Company; 1988-04-14 to 1989-03-23; source msha-controller-operator-history
- **operator_operates_mine:** A & G Coal Company → No 1 Mine; 1989-03-24 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Baker Harold Glenn-Robert L Cox Et Al → No 1 Mine; 1989-03-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Baker Harold Glenn-Robert L Cox Et Al → A & G Coal Company; 1989-03-24 to current/open; source msha-controller-operator-history