# Relationship history for MSHA mine 4405325

Current hierarchy: **Boral Limited → Boral Bricks Inc → Flippin 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:** Boral Limited → Flippin Pit; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Locher Brick Works Inc → Flippin Pit; 1979-01-01 to 1987-02-24; source msha-controller-operator-history
- **controller_controls_mine:** Milburn Colliery Company → Flippin Pit; 1979-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Milburn Colliery Company → Locher Brick Works Inc; 1979-01-01 to 1987-02-24; source msha-controller-operator-history
- **operator_operates_mine:** Boral Bricks Inc → Flippin Pit; 1987-02-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Boral Limited → Boral Bricks Inc; 1987-02-25 to current/open; source msha-controller-operator-history