# Relationship history for MSHA mine 4401849

Current hierarchy: **Vnace Brothers Coal Mining Company → Vance Brothers Coal Mining Company → Mine No 1 T239**

- 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:** Vance Brothers Coal Mining Company → Mine No 1 T239; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Vnace Brothers Coal Mining Company → Mine No 1 T239; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Vnace Brothers Coal Mining Company → Vance Brothers Coal Mining Company; 1950-01-01 to current/open; source msha-controller-operator-history