# Relationship history for MSHA mine 2402180

Current hierarchy: **Shannon Cole  Sandy → Shenandoah Rock Products → HATHAWAY 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:** Shenandoah Rock Products → HATHAWAY PIT; 1999-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Shannon Cole  Sandy → HATHAWAY PIT; 1999-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Shannon Cole  Sandy → Shenandoah Rock Products; 1999-09-01 to current/open; source msha-controller-operator-history