# Relationship history for MSHA mine 1302421

Current hierarchy: **Bill  Winn → Winn Corp → Portable 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:** Bill  Winn → Portable Wash Plant; 1998-04-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Winn Corp → Portable Wash Plant; 2011-03-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bill  Winn → Winn Corp; 2011-03-29 to current/open; source msha-controller-operator-history