# Relationship history for MSHA mine 1000581

Current hierarchy: **Weiber Larry & John Mc Rae → Wics Mix Concrete Products → Wics Mix Plant**

- 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:** Empire Concrete → Wics Mix Plant; 1950-01-01 to 1983-08-02; source msha-controller-operator-history
- **controller_controls_mine:** Hunt Paul E → Wics Mix Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hunt Paul E → Empire Concrete; 1950-01-01 to 1983-08-02; source msha-controller-operator-history
- **operator_operates_mine:** Wics Mix Concrete Products → Wics Mix Plant; 1983-08-03 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Weiber Larry & John Mc Rae → Wics Mix Plant; 1983-08-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Weiber Larry & John Mc Rae → Wics Mix Concrete Products; 1983-08-03 to current/open; source msha-controller-operator-history