# Relationship history for MSHA mine 3304590

Current hierarchy: **Walter E  Stewart → Stewart Construction → Rodney Stone**

- 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:** Stewart Construction → Rodney Stone; 2007-06-12 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Walter E  Stewart → Rodney Stone; 2007-06-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Walter E  Stewart → Stewart Construction; 2007-06-12 to current/open; source msha-controller-operator-history