# Relationship history for MSHA mine 3003665

Current hierarchy: **Frank D  Fernandez → CFI Construction Inc → Cedar Rapids Portable**

- 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:** CFI Construction Inc → Cedar Rapids Portable; 2009-04-07 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Frank D  Fernandez → Cedar Rapids Portable; 2009-04-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Frank D  Fernandez → CFI Construction Inc; 2009-04-07 to current/open; source msha-controller-operator-history