# Relationship history for MSHA mine 3609765

Current hierarchy: **Larry T  Coole; David C  Johnston → D.A.L. → D.A.L.**

- 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:** D.A.L. → D.A.L.; 2009-06-02 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** David C  Johnston et al → D.A.L.; 2009-06-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David C  Johnston et al → D.A.L.; 2009-06-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Larry T  Coole et al → D.A.L.; 2009-06-02 to current/open; source msha-controller-operator-history