# Relationship history for MSHA mine 1001782

Current hierarchy: **Bear Lake County-ID → Bear Lake County → Portable Cruiser 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Bear Lake County → Portable Cruiser Plant; 1987-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Bear Lake County-ID → Portable Cruiser Plant; 1987-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bear Lake County-ID → Bear Lake County; 1987-05-01 to current/open; source msha-controller-operator-history