# Relationship history for MSHA mine 1302339

Current hierarchy: **Brian K  Gibson; Bill R  Gibson → Tri-Star Quarries, LLC → Tri-Star Quarries, LLC - Plano Mine**

- 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:** Tri-Star Quarries, LLC → Tri-Star Quarries, LLC - Plano Mine; 2007-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Bill R  Gibson et al → Tri-Star Quarries, LLC - Plano Mine; 2007-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bill R  Gibson et al → Tri-Star Quarries, LLC; 2007-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brian K  Gibson et al → Tri-Star Quarries, LLC; 2007-02-01 to current/open; source msha-controller-operator-history