# Relationship history for MSHA mine 3502820

Current hierarchy: **State Of Oregon → Oregon State Highway Department → Loe Pit & Plant**

- 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:** Nelson-Deppe Inc → Loe Pit & Plant; 1950-01-01 to 1978-07-14; source msha-controller-operator-history
- **controller_controls_mine:** Larry S  Nelson → Loe Pit & Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Larry S  Nelson → Nelson-Deppe Inc; 1950-01-01 to 1978-07-14; source msha-controller-operator-history
- **controller_controls_mine:** State Of Oregon → Loe Pit & Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Oregon State Highway Department → Loe Pit & Plant; 1978-07-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** State Of Oregon → Oregon State Highway Department; 1978-07-15 to current/open; source msha-controller-operator-history