# Relationship history for MSHA mine 4300828

Current hierarchy: **Cynthia  Riendeau; Lawrence  Riendeau → sutton sand and gravel → Kolburg**

- 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:** sutton sand and gravel → Kolburg; 2024-07-25 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Lawrence  Riendeau et al → Kolburg; 2024-07-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lawrence  Riendeau et al → sutton sand and gravel; 2024-07-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cynthia  Riendeau et al → sutton sand and gravel; 2024-07-25 to current/open; source msha-controller-operator-history