# Relationship history for MSHA mine 4105516

Current hierarchy: **Alan  Palermo → Buck Horn Whitetail Ranch → Hidden Hill 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:** Buck Horn Whitetail Ranch → Hidden Hill Pit; 2020-07-14 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Alan  Palermo → Hidden Hill Pit; 2020-07-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Alan  Palermo → Buck Horn Whitetail Ranch; 2020-07-14 to current/open; source msha-controller-operator-history