# Relationship history for MSHA mine 4003271

Current hierarchy: **Dean  Bennett; Tom  Looney → Plateau Stone Inc → Plateau 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:** Plateau Stone Inc → Plateau Stone; 2006-01-17 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Dean  Bennett et al → Plateau Stone; 2006-01-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dean  Bennett et al → Plateau Stone Inc; 2006-01-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Tom  Looney et al → Plateau Stone Inc; 2006-01-17 to current/open; source msha-controller-operator-history