# Relationship history for MSHA mine 3503711

Current hierarchy: **George  Winegar → Winegar Excavating Inc. → Rock Crusher**

- 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:** Winegar Excavating Inc. → Rock Crusher; 2008-12-04 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** George  Winegar → Rock Crusher; 2008-12-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** George  Winegar → Winegar Excavating Inc.; 2008-12-04 to current/open; source msha-controller-operator-history