# Relationship history for MSHA mine 2302335

Current hierarchy: **Delbert H  Wieberg → Delbert Wieberg Skid Loader & Dump Truck Service → Lane 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Delbert Wieberg Skid Loader & Dump Truck Service → Lane Mine; 2006-05-22 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Delbert H  Wieberg → Lane Mine; 2006-05-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Delbert H  Wieberg → Delbert Wieberg Skid Loader & Dump Truck Service; 2006-05-22 to current/open; source msha-controller-operator-history