# Relationship history for MSHA mine 5000945

Current hierarchy: **Dwain  Reddekopp → Dwain Reddekopp Inc → Tee Harbor 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:** Alaska State Department Of Transportation → Tee Harbor Pit; 1950-01-01 to 1979-07-24; source msha-controller-operator-history
- **controller_controls_mine:** State Of Alaska → Tee Harbor Pit; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** State Of Alaska → Alaska State Department Of Transportation; 1950-01-01 to 1979-07-24; source msha-controller-operator-history
- **controller_controls_mine:** Dwain  Reddekopp → Tee Harbor Pit; 1979-06-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Dwain Reddekopp Inc → Tee Harbor Pit; 1979-07-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dwain  Reddekopp → Dwain Reddekopp Inc; 1979-07-25 to current/open; source msha-controller-operator-history