# Relationship history for MSHA mine 4105778

Current hierarchy: **Clay  Wittwer → Verdego Materials LLC → Beltline Pit**

- 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:** Verdego Materials LLC → Beltline Pit; 2024-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Clay  Wittwer → Beltline Pit; 2024-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Clay  Wittwer → Verdego Materials LLC; 2024-12-01 to current/open; source msha-controller-operator-history