# Relationship history for MSHA mine 4403891

Current hierarchy: **Stanley Fred & Jackie → R F & C Coal Company Inc → No 2 Strip**

- 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:** R F & C Coal Company Inc → No 2 Strip; 1974-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Stanley Fred & Jackie → No 2 Strip; 1974-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Stanley Fred & Jackie → R F & C Coal Company Inc; 1974-12-01 to current/open; source msha-controller-operator-history