# Relationship history for MSHA mine 1516602

Current hierarchy: **Arthur C  Miller → Miller Mining Company Inc → No 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Arthur C  Miller → No 2; 1987-08-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Miller Mining Company Inc → No 2; 1989-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Arthur C  Miller → Miller Mining Company Inc; 1989-04-01 to current/open; source msha-controller-operator-history