# Relationship history for MSHA mine 4103471

Current hierarchy: **Scott Robert D → R D Scott Dozer Service → Scott Pit**

- 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

- **operator_operates_mine:** R D Scott Dozer Service → Scott Pit; 1987-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Scott Robert D → Scott Pit; 1987-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Scott Robert D → R D Scott Dozer Service; 1987-05-01 to current/open; source msha-controller-operator-history