# Relationship history for MSHA mine 0103563

Current hierarchy: **Gregory Douglas  Ross → Alabama Aggregates → Tillman 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

- **controller_controls_mine:** Gregory Douglas  Ross → Tillman Pit; 2010-05-10 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Alabama Aggregates → Tillman Pit; 2022-07-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gregory Douglas  Ross → Alabama Aggregates; 2022-07-15 to current/open; source msha-controller-operator-history