# Relationship history for MSHA mine 5001986

Current hierarchy: **Joseph A  Young → Fairbanks Excavation, LLC → Fairbanks Excavation Mine**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Fairbanks Excavation, LLC → Fairbanks Excavation Mine; 2012-06-27 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Raymond  Young → Fairbanks Excavation Mine; 2012-06-27 to 2020-08-31; source msha-controller-operator-history
- **controller_controls_operator:** Raymond  Young → Fairbanks Excavation, LLC; 2012-06-27 to 2020-08-31; source msha-controller-operator-history
- **controller_controls_mine:** Jeradell  DeZarn-Young → Fairbanks Excavation Mine; 2020-09-01 to 2022-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Jeradell  DeZarn-Young → Fairbanks Excavation, LLC; 2020-09-01 to 2022-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Joseph A  Young → Fairbanks Excavation Mine; 2023-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Joseph A  Young → Fairbanks Excavation, LLC; 2023-01-01 to current/open; source msha-controller-operator-history