# Relationship history for MSHA mine 4406543

Current hierarchy: **Woodard Lynn → Kenwood Mining Company → #1 Auger**

- 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:** Kenwood Mining Company → #1 Auger; 1989-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Woodard Lynn → #1 Auger; 1989-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Woodard Lynn → Kenwood Mining Company; 1989-09-01 to current/open; source msha-controller-operator-history