# Relationship history for MSHA mine 5100257

Current hierarchy: **Goodfellow Brothers LLC → Goodfellow Bros. LLC → GBI #9 Kleeman K0 236**

- 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:** Goodfellow Brothers LLC → GBI #9 Kleeman K0 236; 1978-03-09 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Goodfellow Bros. LLC → GBI #9 Kleeman K0 236; 2005-07-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Goodfellow Brothers LLC → Goodfellow Bros. LLC; 2005-07-13 to current/open; source msha-controller-operator-history