# Relationship history for MSHA mine 4606523

Current hierarchy: **A F Budge Mining Ltd → Phoenix Resources Inc → Coal Bank Fork No 8**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Valley Industries Inc → Coal Bank Fork No 8; 1976-12-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** S S Joe Burford Inc → Coal Bank Fork No 8; 1982-05-01 to 1985-03-14; source msha-controller-operator-history
- **controller_controls_operator:** Valley Industries Inc → S S Joe Burford Inc; 1982-05-01 to 1985-03-14; source msha-controller-operator-history
- **operator_operates_mine:** Phoenix Resources Inc → Coal Bank Fork No 8; 1985-03-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** A F Budge Mining Ltd → Coal Bank Fork No 8; 1985-03-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** A F Budge Mining Ltd → Phoenix Resources Inc; 1985-03-15 to current/open; source msha-controller-operator-history