# Relationship history for MSHA mine 2902555

Current hierarchy: **Dustin P Smith → Cobble Canyon LLC → Thurston 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Cobble Canyon LLC → Thurston pit; 2023-01-16 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Dustin P Smith → Thurston pit; 2023-01-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dustin P Smith → Cobble Canyon LLC; 2023-01-16 to current/open; source msha-controller-operator-history