# Relationship history for MSHA mine 3609027

Current hierarchy: **Joseph A  Decker Sr → Joseph A. Decker, Sr. → JOSEPH A. DECKER, SR. QUARRY**

- 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:** Joseph A. Decker, Sr. → JOSEPH A. DECKER, SR. QUARRY; 2001-09-25 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Joseph A  Decker Sr → JOSEPH A. DECKER, SR. QUARRY; 2001-09-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Joseph A  Decker Sr → Joseph A. Decker, Sr.; 2001-09-25 to current/open; source msha-controller-operator-history