# Relationship history for MSHA mine 2302074

Current hierarchy: **Leibach Hattie M → Walnut Ridge Enterprises Ltd → LEIBACH PLANT #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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Walnut Ridge Enterprises Ltd → LEIBACH PLANT #1; 1992-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Leibach Hattie M → LEIBACH PLANT #1; 1992-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Leibach Hattie M → Walnut Ridge Enterprises Ltd; 1992-11-01 to current/open; source msha-controller-operator-history