# Relationship history for MSHA mine 3608163

Current hierarchy: **George  Cowfer Jr → Junior Coal Contracting Inncorporated → Hoover Job**

- 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:** Junior Coal Contracting Inncorporated → Hoover Job; 1990-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** George  Cowfer Jr → Hoover Job; 1990-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** George  Cowfer Jr → Junior Coal Contracting Inncorporated; 1990-03-01 to current/open; source msha-controller-operator-history