# Relationship history for MSHA mine 3503479

Current hierarchy: **Craig L  Smith → B C X Inc → Diblee Pit**

- 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:** B C X Inc → Diblee Pit; 1999-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Craig L  Smith → Diblee Pit; 1999-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Craig L  Smith → B C X Inc; 1999-04-01 to current/open; source msha-controller-operator-history