# Relationship history for MSHA mine 3609175

Current hierarchy: **John R  Kellar → Kellar Augering Inc → Kellar #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:** Kellar Augering Inc → Kellar #1; 2003-11-21 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** John R  Kellar → Kellar #1; 2003-11-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John R  Kellar → Kellar Augering Inc; 2003-11-21 to current/open; source msha-controller-operator-history