# Relationship history for MSHA mine 4104254

Current hierarchy: **Clarence  Weger → Clarence Weger Sand & Gravel → CLARENCE WEGER SAND & GRAVEL**

- 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:** Clarence Weger Sand & Gravel → CLARENCE WEGER SAND & GRAVEL; 2001-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Clarence  Weger → CLARENCE WEGER SAND & GRAVEL; 2001-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Clarence  Weger → Clarence Weger Sand & Gravel; 2001-01-01 to current/open; source msha-controller-operator-history