# Relationship history for MSHA mine 1600933

Current hierarchy: **State Of Louisiana → State Of Louisiana Dept Of Trans Dev → Ferguson Pit-Dist 8**

- 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:** State Of Louisiana → Ferguson Pit-Dist 8; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** State Of Louisiana Dept Of Trans Dev → Ferguson Pit-Dist 8; 1979-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** State Of Louisiana → State Of Louisiana Dept Of Trans Dev; 1979-01-01 to current/open; source msha-controller-operator-history