# Relationship history for MSHA mine 2104082

Current hierarchy: **Oliver  Rauschnot; Kenneth  Rauschnot → Ramberg Excavating → Ramberg Rock Creek Pit**

- 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:** Ramberg Excavating → Ramberg Rock Creek Pit; 2024-07-17 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Oliver  Rauschnot et al → Ramberg Rock Creek Pit; 2024-07-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Oliver  Rauschnot et al → Ramberg Excavating; 2024-07-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kenneth  Rauschnot et al → Ramberg Excavating; 2024-07-17 to current/open; source msha-controller-operator-history