# Relationship history for MSHA mine 3606944

Current hierarchy: **A F Budge Mining Ltd → Vendale Coal Company Inc → Vendale Strips #2**

- 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

- **controller_controls_mine:** A F Budge Mining Ltd → Vendale Strips #2; 1978-03-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Vendale Coal Company Inc → Vendale Strips #2; 1980-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** A F Budge Mining Ltd → Vendale Coal Company Inc; 1980-02-01 to current/open; source msha-controller-operator-history