# Relationship history for MSHA mine 1508280

Current hierarchy: **Rogers James-Bill & Jack--Claude Frazier → J & C Coal Company → No 2 Mine**

- 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:** J & C Coal Company → No 2 Mine; 1975-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Rogers James-Bill & Jack--Claude Frazier → No 2 Mine; 1975-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rogers James-Bill & Jack--Claude Frazier → J & C Coal Company; 1975-05-01 to current/open; source msha-controller-operator-history