# Relationship history for MSHA mine 4300673

Current hierarchy: **Russell  Riendeau → Russell Riendeau & Sons Inc. → Roto Screen**

- 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:** Russell Riendeau & Sons Inc. → Roto Screen; 2007-07-11 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Russell  Riendeau → Roto Screen; 2007-07-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Russell  Riendeau → Russell Riendeau & Sons Inc.; 2007-07-11 to current/open; source msha-controller-operator-history