# Relationship history for MSHA mine 2402803

Current hierarchy: **Rex  Leipheimer; John  Jeffery → Jeffery Contracting LLC → Jeffery Wash Plant**

- 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

- **controller_controls_mine:** Rex  Leipheimer et al → Jeffery Wash Plant; 2023-01-24 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Jeffery Contracting LLC → Jeffery Wash Plant; 2024-03-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rex  Leipheimer et al → Jeffery Contracting LLC; 2024-03-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John  Jeffery et al → Jeffery Contracting LLC; 2024-03-19 to current/open; source msha-controller-operator-history