# Relationship history for MSHA mine 4202724

Current hierarchy: **Sage  Bludworth → Triple D Excavation, LLC → Lott Canyon 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:** Triple D Excavation, LLC → Lott Canyon Mine; 2021-03-08 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Sage  Bludworth → Lott Canyon Mine; 2021-03-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Sage  Bludworth → Triple D Excavation, LLC; 2021-03-08 to current/open; source msha-controller-operator-history