# Relationship history for MSHA mine 4502860

Current hierarchy: **Bisson Alvin & Fred Rose → Earl Cahoon & Partners → Indian Trail Mine**

- 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:** Earl Cahoon & Partners → Indian Trail Mine; 1980-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Bisson Alvin & Fred Rose → Indian Trail Mine; 1980-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bisson Alvin & Fred Rose → Earl Cahoon & Partners; 1980-09-01 to current/open; source msha-controller-operator-history