# Relationship history for MSHA mine 3901366

Current hierarchy: **Rosane Douglas & Dennis → R A & S Contracting Company → Unit No 3**

- 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:** Rosane Douglas & Dennis → Unit No 3; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** R A & S Contracting Company → Unit No 3; 1988-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rosane Douglas & Dennis → R A & S Contracting Company; 1988-06-01 to current/open; source msha-controller-operator-history