# Relationship history for MSHA mine 2901710

Current hierarchy: **George  Lotspeich → Cobb Resources Corp → Westranch Mine Or Westranch**

- 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:** Cobb Resources Corp → Westranch Mine Or Westranch; 1978-03-09 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** George  Lotspeich → Westranch Mine Or Westranch; 1978-03-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** George  Lotspeich → Cobb Resources Corp; 1978-03-09 to current/open; source msha-controller-operator-history