# Relationship history for MSHA mine 3401672

Current hierarchy: **Laufen Ceramics Inc → International American Ceramics Inc → Mine #2 Hominy**

- 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:** International American Ceramics Inc → Mine #2 Hominy; 1989-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Laufen Ceramics Inc → Mine #2 Hominy; 1989-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Laufen Ceramics Inc → International American Ceramics Inc; 1989-03-01 to current/open; source msha-controller-operator-history