# Relationship history for MSHA mine 1513845

Current hierarchy: **Jordan Robert N → Jordan Coal Sales → Jordan Coal Sales No 1**

- 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:** Jordan Coal Sales → Jordan Coal Sales No 1; 1982-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jordan Robert N → Jordan Coal Sales No 1; 1982-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jordan Robert N → Jordan Coal Sales; 1982-11-01 to current/open; source msha-controller-operator-history