# Relationship history for MSHA mine 1401459

Current hierarchy: **Hunt Midwest Enterprises → Hunt Midwest Mining Inc → PLANT #2**

- 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

- **controller_controls_mine:** R B  Killough → PLANT #2; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Hunt Midwest Enterprises → PLANT #2; 1985-06-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Killough Quarries Inc → PLANT #2; 1985-07-01 to 1995-05-31; source msha-controller-operator-history
- **controller_controls_operator:** R B  Killough → Killough Quarries Inc; 1985-07-01 to 1995-05-31; source msha-controller-operator-history
- **operator_operates_mine:** Hunt Midwest Mining Inc → PLANT #2; 1995-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hunt Midwest Enterprises → Hunt Midwest Mining Inc; 1995-06-01 to current/open; source msha-controller-operator-history