# Relationship history for MSHA mine 1001484

Current hierarchy: **Nez Perce County → Nez Perce County Road Bridge Department → Lewiston Hill Quarry 102**

- 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

- **controller_controls_mine:** Nez Perce County → Lewiston Hill Quarry 102; 1980-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Nez Perce County Road Bridge Department → Lewiston Hill Quarry 102; 1980-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Nez Perce County → Nez Perce County Road Bridge Department; 1980-06-01 to current/open; source msha-controller-operator-history