# Relationship history for MSHA mine 4700811

Current hierarchy: **Arthur  Voit → E C Voit & Sons → E. C. VOIT & SONS**

- 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:** E C Voit & Sons → E. C. VOIT & SONS; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Arthur  Voit → E. C. VOIT & SONS; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Arthur  Voit → E C Voit & Sons; 1950-01-01 to current/open; source msha-controller-operator-history