# Relationship history for MSHA mine 2302549

Current hierarchy: **Greg Ray  Phillips; Darren Eugene  Norris → Best Lime Manufacturing → Best Lime Manufacturing**

- 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:** Best Lime Manufacturing → Best Lime Manufacturing; 2020-12-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Darren Eugene  Norris et al → Best Lime Manufacturing; 2020-12-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Darren Eugene  Norris et al → Best Lime Manufacturing; 2020-12-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Greg Ray  Phillips et al → Best Lime Manufacturing; 2020-12-15 to current/open; source msha-controller-operator-history