# Relationship history for MSHA mine 1512657

Current hierarchy: **Douglas James → Radar Coal Company Inc → Mine #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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Douglas James → Mine #2; 1980-07-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Radar Coal Company Inc → Mine #2; 1980-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Douglas James → Radar Coal Company Inc; 1980-12-01 to current/open; source msha-controller-operator-history