# Relationship history for MSHA mine 1511467

Current hierarchy: **Frazier Gary L → F L G Coal Company Inc → Sam Wooton 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:** Wooton Sam → Sam Wooton Mine; 1975-10-02 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Sam Wooton Coal Company → Sam Wooton Mine; 1978-07-01 to 1979-08-20; source msha-controller-operator-history
- **controller_controls_operator:** Wooton Sam → Sam Wooton Coal Company; 1978-07-01 to 1979-08-20; source msha-controller-operator-history
- **operator_operates_mine:** F L G Coal Company Inc → Sam Wooton Mine; 1979-08-21 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Frazier Gary L → Sam Wooton Mine; 1979-08-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Frazier Gary L → F L G Coal Company Inc; 1979-08-21 to current/open; source msha-controller-operator-history