# Relationship history for MSHA mine 3604352

Current hierarchy: **White Richard N → R N White Contracting Company → White Strip Mine No 1**

- 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 N White Contracting Company → White Strip Mine No 1; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** White Richard N → White Strip Mine No 1; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** White Richard N → R N White Contracting Company; 1950-01-01 to current/open; source msha-controller-operator-history