# Relationship history for MSHA mine 0405203

Current hierarchy: **Wayne  Sowle → WAYNE'S DRIFT MINE (TUNNEL) → WAYNBO DRIFT MINE  WAYNE S. TUNNEL**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** WAYNE'S DRIFT MINE (TUNNEL) → WAYNBO DRIFT MINE  WAYNE S. TUNNEL; 1992-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Wayne  Sowle → WAYNBO DRIFT MINE  WAYNE S. TUNNEL; 1992-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Wayne  Sowle → WAYNE'S DRIFT MINE (TUNNEL); 1992-12-01 to current/open; source msha-controller-operator-history