# Relationship history for MSHA mine 2602266

Current hierarchy: **Whisenant Ray → W & S Sand → W & S Sand 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:** W & S Sand → W & S Sand Pit; 1995-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Whisenant Ray → W & S Sand Pit; 1995-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Whisenant Ray → W & S Sand; 1995-02-01 to current/open; source msha-controller-operator-history