# Relationship history for MSHA mine 3901201

Current hierarchy: **Robideau Dean → Aggregate'S Inc → Aggregate'S Inc 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:** Aggregate'S Inc → Aggregate'S Inc Pit; 1979-01-01 to 1985-06-13; source msha-controller-operator-history
- **controller_controls_mine:** Schneider E J → Aggregate'S Inc Pit; 1979-01-01 to 1985-06-13; source msha-controller-operator-history
- **controller_controls_operator:** Schneider E J → Aggregate'S Inc; 1979-01-01 to 1985-06-13; source msha-controller-operator-history
- **operator_operates_mine:** Aggregate'S Inc → Aggregate'S Inc Pit; 1985-06-14 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Robideau Dean → Aggregate'S Inc Pit; 1985-06-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robideau Dean → Aggregate'S Inc; 1985-06-14 to current/open; source msha-controller-operator-history