# Relationship history for MSHA mine 3609748

Current hierarchy: **Dave  Empet → Dave Empet → Kilmer-Galeton Quarry**

- 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:** Dave Empet → Kilmer-Galeton Quarry; 2009-04-28 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Dave  Empet → Kilmer-Galeton Quarry; 2009-04-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dave  Empet → Dave Empet; 2009-04-28 to current/open; source msha-controller-operator-history