# Relationship history for MSHA mine 4002591

Current hierarchy: **Shubert James → H & S Coal Company → Potter Mine 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

- **controller_controls_mine:** Shubert James → Potter Mine No 1; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Potter H Paul Et Al → Potter Mine No 1; 1980-02-25 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Potter Mining Company Inc → Potter Mine No 1; 1980-03-01 to 1983-10-12; source msha-controller-operator-history
- **controller_controls_operator:** Potter H Paul Et Al → Potter Mining Company Inc; 1980-03-01 to 1983-10-12; source msha-controller-operator-history
- **operator_operates_mine:** H & S Coal Company → Potter Mine No 1; 1983-10-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Shubert James → H & S Coal Company; 1983-10-13 to current/open; source msha-controller-operator-history