# Relationship history for MSHA mine 3604186

Current hierarchy: **William A  Long; James R  Long → A W Long Coal Company → A W Long Coal Company**

- 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

- **operator_operates_mine:** A W Long Coal Company → A W Long Coal Company; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** James R  Long et al → A W Long Coal Company; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James R  Long et al → A W Long Coal Company; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** William A  Long et al → A W Long Coal Company; 1950-01-01 to current/open; source msha-controller-operator-history