# Relationship history for MSHA mine 2902284

Current hierarchy: **Katherina L  Winer; Steven J  Winer → KW Enterprises LLC → Neff Trust Quarry**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** KW Enterprises LLC → Neff Trust Quarry; 2005-05-26 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Steven J  Winer et al → Neff Trust Quarry; 2005-05-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Steven J  Winer et al → KW Enterprises LLC; 2005-05-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Katherina L  Winer et al → KW Enterprises LLC; 2005-05-26 to current/open; source msha-controller-operator-history