# Relationship history for MSHA mine 1509458

Current hierarchy: **Charles  Hoke; Anne  Hoke → A & B Coal Company Inc → Strip 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

- **operator_operates_mine:** A & B Coal Company Inc → Strip No 1; 1976-01-01 to 1977-04-30; source msha-controller-operator-history
- **controller_controls_mine:** Alexander Jerry → Strip No 1; 1976-01-01 to 1977-04-30; source msha-controller-operator-history
- **controller_controls_operator:** Alexander Jerry → A & B Coal Company Inc; 1976-01-01 to 1977-04-30; source msha-controller-operator-history
- **operator_operates_mine:** A & B Coal Company Inc → Strip No 1; 1977-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Anne  Hoke et al → Strip No 1; 1977-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Anne  Hoke et al → A & B Coal Company Inc; 1977-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Charles  Hoke et al → A & B Coal Company Inc; 1977-05-01 to current/open; source msha-controller-operator-history