# Relationship history for MSHA mine 4607059

Current hierarchy: **Hays Dale E → Shannon Coal Company Inc → Sunvalley 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

- **controller_controls_mine:** Hays Dale E → Sunvalley Mine; 1980-10-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Shannon Coal Company Inc → Sunvalley Mine; 1986-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hays Dale E → Shannon Coal Company Inc; 1986-01-01 to current/open; source msha-controller-operator-history