# Relationship history for MSHA mine 3401769

Current hierarchy: **Laufen Ceramics Inc → Laufen International Ceramic Tile → Wade Mine #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

- **controller_controls_mine:** Laufen Ceramics Inc → Wade Mine #1; 1989-03-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Laufen International Ceramic Tile → Wade Mine #1; 1993-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Laufen Ceramics Inc → Laufen International Ceramic Tile; 1993-01-01 to current/open; source msha-controller-operator-history