# Relationship history for MSHA mine 0504564

Current hierarchy: **Tim  Hartley → Lincoln Gold Mines Inc → Alma Lincoln**

- 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

- **operator_operates_mine:** Lincoln Gold Mines Inc → Alma Lincoln; 1995-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Tim  Hartley → Alma Lincoln; 1995-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Tim  Hartley → Lincoln Gold Mines Inc; 1995-06-01 to current/open; source msha-controller-operator-history