# Relationship history for MSHA mine 4607434

Current hierarchy: **Czarnowski David S → Burning Rock Energy Inc → #1 Surface & 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:** White Water Mining Inc → #1 Surface & Auger; 1988-01-01 to 1988-11-20; source msha-controller-operator-history
- **controller_controls_mine:** Bailey William J → #1 Surface & Auger; 1988-01-01 to 1988-11-20; source msha-controller-operator-history
- **controller_controls_operator:** Bailey William J → White Water Mining Inc; 1988-01-01 to 1988-11-20; source msha-controller-operator-history
- **operator_operates_mine:** Burning Rock Energy Inc → #1 Surface & Auger; 1988-11-21 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Czarnowski David S → #1 Surface & Auger; 1988-11-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Czarnowski David S → Burning Rock Energy Inc; 1988-11-21 to current/open; source msha-controller-operator-history