# Relationship history for MSHA mine 1515922

Current hierarchy: **Coleman James A → Best Elkhorn Mining Company Inc → Best Elkhorn Nealy Br**

- 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:** Coleman James A → Best Elkhorn Nealy Br; 1983-08-11 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Best Elkhorn Mining Company Inc → Best Elkhorn Nealy Br; 1987-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Coleman James A → Best Elkhorn Mining Company Inc; 1987-02-01 to current/open; source msha-controller-operator-history