# Relationship history for MSHA mine 4103202

Current hierarchy: **Dement Ivan → Ivan Dement Inc → Oneal 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

- **controller_controls_mine:** Dement Ivan → Oneal Pit; 1978-03-09 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Ivan Dement Inc → Oneal Pit; 1983-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dement Ivan → Ivan Dement Inc; 1983-11-01 to current/open; source msha-controller-operator-history