# Relationship history for MSHA mine 1518641

Current hierarchy: **Robert W  Miller; Dean  Miller → Miller Bros Coal Inc → Weeksbury #1**

- 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:** Dean  Miller Et Al → Weeksbury #1; 1981-04-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Miller Bros Coal Inc → Weeksbury #1; 2003-06-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dean  Miller Et Al → Miller Bros Coal Inc; 2003-06-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert W  Miller Et Al → Miller Bros Coal Inc; 2003-06-30 to current/open; source msha-controller-operator-history