# Relationship history for MSHA mine 0203492

Current hierarchy: **Wyatt  Orr → EARTH RESOURCES CORPORATION → DEWEY PORTABLE (2)**

- 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:** Wilson Wayne  Orr → DEWEY PORTABLE (2); 2017-02-22 to 2024-01-15; source msha-controller-operator-history
- **operator_operates_mine:** Earth Resources Corporation → DEWEY PORTABLE (2); 2024-01-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Wilson Wayne  Orr → Earth Resources Corporation; 2024-01-16 to 2024-01-15; source msha-controller-operator-history
- **controller_controls_mine:** Wyatt  Orr → DEWEY PORTABLE (2); 2024-01-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Wyatt  Orr → Earth Resources Corporation; 2024-01-16 to current/open; source msha-controller-operator-history