# Relationship history for MSHA mine 0203164

Current hierarchy: **US American Resources Inc → US American Resources, Inc. → Congress Mine**

- 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:** US American Resources, Inc. → Congress Mine; 2007-02-21 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** US American Resources Inc → Congress Mine; 2007-02-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** US American Resources Inc → US American Resources, Inc.; 2007-02-21 to current/open; source msha-controller-operator-history