# Relationship history for MSHA mine 4403329

Current hierarchy: **Morris Buddy E → North Fork Coal Company Inc → No 1-Strip**

- 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:** North Fork Coal Company Inc → No 1-Strip; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Morris Buddy E → No 1-Strip; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Morris Buddy E → North Fork Coal Company Inc; 1950-01-01 to current/open; source msha-controller-operator-history