# Relationship history for MSHA mine 4407033

Current hierarchy: **David C  Cooper → Cooper Coal Inc → No 1 Auger**

- 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:** Thomas Energy, Inc. → No 1 Auger; 2001-06-01 to 2008-07-15; source msha-controller-operator-history
- **controller_controls_mine:** Gerald D  Thomas → No 1 Auger; 2001-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gerald D  Thomas → Thomas Energy, Inc.; 2001-06-01 to 2008-07-15; source msha-controller-operator-history
- **controller_controls_mine:** David C  Cooper → No 1 Auger; 2008-07-15 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Cooper Coal Inc → No 1 Auger; 2008-07-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David C  Cooper → Cooper Coal Inc; 2008-07-16 to current/open; source msha-controller-operator-history