# Relationship history for MSHA mine 1102732

Current hierarchy: **Shelly Herbert → Whiteside Quarries Inc → Thomson-Groharing**

- 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:** Shelly Herbert → Thomson-Groharing; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Whiteside Quarries Inc → Thomson-Groharing; 1980-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Shelly Herbert → Whiteside Quarries Inc; 1980-05-01 to current/open; source msha-controller-operator-history