# Relationship history for MSHA mine 0102512

Current hierarchy: **Smith Charles → Warrior River Resources Inc → Gurley Creek 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Casgar Thomas W → Gurley Creek Mine; 1981-08-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Casgar Coal Company Inc → Gurley Creek Mine; 1982-10-01 to 1984-12-12; source msha-controller-operator-history
- **controller_controls_operator:** Casgar Thomas W → Casgar Coal Company Inc; 1982-10-01 to 1984-12-12; source msha-controller-operator-history
- **operator_operates_mine:** Warrior River Resources Inc → Gurley Creek Mine; 1984-12-13 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Smith Charles → Gurley Creek Mine; 1984-12-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Smith Charles → Warrior River Resources Inc; 1984-12-13 to current/open; source msha-controller-operator-history