# Relationship history for MSHA mine 2602834

Current hierarchy: **Bart  Hiatt → A & K EARTH MOVERS → 7x20 J.C.I. Screen #1494**

- 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 → 7x20 J.C.I. Screen #1494; 1979-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** A & K EARTH MOVERS → 7x20 J.C.I. Screen #1494; 2018-07-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bart  Hiatt → A & K EARTH MOVERS; 2018-07-20 to current/open; source msha-controller-operator-history