# Relationship history for MSHA mine 0200695

Current hierarchy: **Cletus  Frei → Saguard Concrete Company → Sand And Gravel Pit And 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: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **operator_operates_mine:** Saguard Concrete Company → Sand And Gravel Pit And Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Cletus  Frei → Sand And Gravel Pit And Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cletus  Frei → Saguard Concrete Company; 1950-01-01 to current/open; source msha-controller-operator-history