# Relationship history for MSHA mine 2602670

Current hierarchy: **Bart  Hiatt → A & K Earth Movers Inc → Kodiak 400 #1391**

- 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:** Bart  Hiatt → Kodiak 400 #1391; 1979-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** A & K Earth Movers Inc → Kodiak 400 #1391; 2009-03-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bart  Hiatt → A & K Earth Movers Inc; 2009-03-16 to current/open; source msha-controller-operator-history