# Relationship history for MSHA mine 3003604

Current hierarchy: **Gregg  Robinson Sr → Greg Robinson Sr. → Barely Heaven**

- 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:** Greg Robinson Sr. → Barely Heaven; 2007-08-13 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Gregg  Robinson Sr → Barely Heaven; 2007-08-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gregg  Robinson Sr → Greg Robinson Sr.; 2007-08-13 to current/open; source msha-controller-operator-history