# Relationship history for MSHA mine 0101717

Current hierarchy: **Dark Robert C → Hillabee Brick Company Inc → Hillabee Pit No 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Hillabee Brick Company Inc → Hillabee Pit No 1; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Dark Robert C → Hillabee Pit No 1; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dark Robert C → Hillabee Brick Company Inc; 1950-01-01 to current/open; source msha-controller-operator-history