# Relationship history for MSHA mine 1514662

Current hierarchy: **Russell  Stanley → Tug Valley Trucking & Supply Company Inc → Tug Valley No 1 Dredge (D)**

- 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:** Tug Valley Trucking & Supply Company Inc → Tug Valley No 1 Dredge (D); 1984-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Russell  Stanley → Tug Valley No 1 Dredge (D); 1984-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Russell  Stanley → Tug Valley Trucking & Supply Company Inc; 1984-06-01 to current/open; source msha-controller-operator-history