# Relationship history for MSHA mine 3304212

Current hierarchy: **American Industries & Resources Corp → A I R C Realty Inc → No 9-Strip**

- 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:** A I R C Realty Inc → No 9-Strip; 1990-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** American Industries & Resources Corp → No 9-Strip; 1990-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** American Industries & Resources Corp → A I R C Realty Inc; 1990-08-01 to current/open; source msha-controller-operator-history