# Relationship history for MSHA mine 3609639

Current hierarchy: **Dale A  Kingston → Dale Kingston → Kingston Stone**

- 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

- **controller_controls_mine:** Dale A  Kingston → Kingston Stone; 2001-03-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Dale Kingston → Kingston Stone; 2008-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dale A  Kingston → Dale Kingston; 2008-07-01 to current/open; source msha-controller-operator-history