# Relationship history for MSHA mine 1509877

Current hierarchy: **Goodaker Garry → Double G Mining Inc → Christie**

- 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:** Goodaker Garry → Christie; 1975-12-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Double G Mining Inc → Christie; 1976-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Goodaker Garry → Double G Mining Inc; 1976-07-01 to current/open; source msha-controller-operator-history