# Relationship history for MSHA mine 4700920

Current hierarchy: **Jeffrey S  Miller; Peter L  Miller → R.W. Miller & Sons, Inc. → Ryan Pit**

- 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:** R.W. Miller & Sons, Inc. → Ryan Pit; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Peter L  Miller et al → Ryan Pit; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Peter L  Miller et al → R.W. Miller & Sons, Inc.; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jeffrey S  Miller et al → R.W. Miller & Sons, Inc.; 1950-01-01 to current/open; source msha-controller-operator-history