# Relationship history for MSHA mine 5001287

Current hierarchy: **Olsen Harlan D & Anita → Kodzoff Pit → Kodzoff 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:** Dwain Reddekopp Inc → Kodzoff Pit; 1979-06-01 to 1983-07-19; source msha-controller-operator-history
- **controller_controls_mine:** Dwain  Reddekopp → Kodzoff Pit; 1979-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dwain  Reddekopp → Dwain Reddekopp Inc; 1979-06-01 to 1983-07-19; source msha-controller-operator-history
- **operator_operates_mine:** Kodzoff Pit → Kodzoff Pit; 1983-07-20 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Olsen Harlan D & Anita → Kodzoff Pit; 1983-07-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Olsen Harlan D & Anita → Kodzoff Pit; 1983-07-20 to current/open; source msha-controller-operator-history