# Relationship history for MSHA mine 2301807

Current hierarchy: **Hammond Robert L → Missouri Leasing & Investment Company Inc → Rebecca Jean**

- 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:** Missouri Leasing & Investment Company Inc → Rebecca Jean; 1980-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Hammond Robert L → Rebecca Jean; 1980-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hammond Robert L → Missouri Leasing & Investment Company Inc; 1980-06-01 to current/open; source msha-controller-operator-history