# Relationship history for MSHA mine 3608679

Current hierarchy: **Donald C  Bender; Rick  Bender → Wheel's Coal Company → No 5 Vein**

- 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:** Wheel's Coal Company → No 5 Vein; 1994-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Rick  Bender et al → No 5 Vein; 1994-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rick  Bender et al → Wheel's Coal Company; 1994-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Donald C  Bender et al → Wheel's Coal Company; 1994-06-01 to current/open; source msha-controller-operator-history