# Relationship history for MSHA mine 2003446

Current hierarchy: **Marvin  Wood → Lee Wood Contracting Inc → Madill Yarder**

- 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:** Marvin  Wood → Madill Yarder; 1997-08-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Lee Wood Contracting Inc → Madill Yarder; 2010-07-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Marvin  Wood → Lee Wood Contracting Inc; 2010-07-28 to current/open; source msha-controller-operator-history