# Relationship history for MSHA mine 4605151

Current hierarchy: **Rogers Odell → Wedgewood Coal Corp → Wedgewood No 7 Surface**

- 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:** Rogers Odell → Wedgewood No 7 Surface; 1974-09-11 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Wedgewood Coal Corp → Wedgewood No 7 Surface; 1976-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rogers Odell → Wedgewood Coal Corp; 1976-01-01 to current/open; source msha-controller-operator-history