# Relationship history for MSHA mine 4607524

Current hierarchy: **Callison Dale → Little Sewell Mountain Coal Company Inc → #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

- **operator_operates_mine:** Little Sewell Mountain Coal Company Inc → #2; 1988-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Callison Dale → #2; 1988-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Callison Dale → Little Sewell Mountain Coal Company Inc; 1988-06-01 to current/open; source msha-controller-operator-history