# Relationship history for MSHA mine 3003156

Current hierarchy: **Reuben  Kanaval Jr → Kanaval's Excavating & Gravel → Kanaval's Excavating & Gravel**

- 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:** Kanaval's Excavating & Gravel → Kanaval's Excavating & Gravel; 1996-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Reuben  Kanaval Jr → Kanaval's Excavating & Gravel; 1996-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Reuben  Kanaval Jr → Kanaval's Excavating & Gravel; 1996-05-01 to current/open; source msha-controller-operator-history