# Relationship history for MSHA mine 2000683

Current hierarchy: **G Charles  Hubscher → Hubscher & Son Inc → CEDAR RAPIDS #443**

- 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:** Hubscher & Son Inc → CEDAR RAPIDS #443; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** G Charles  Hubscher → CEDAR RAPIDS #443; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** G Charles  Hubscher → Hubscher & Son Inc; 1950-01-01 to current/open; source msha-controller-operator-history