# Relationship history for MSHA mine 4602557

Current hierarchy: **Thompson James W → Thompson Coal & Construction Inc → Jerry Run 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:** Thompson Coal & Construction Inc → Jerry Run Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Thompson James W → Jerry Run Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Thompson James W → Thompson Coal & Construction Inc; 1950-01-01 to current/open; source msha-controller-operator-history