# Relationship history for MSHA mine 0404556

Current hierarchy: **Ellsworth Metals-F C L Enterprises → Ellsworth Metals Inc → E & F Milling**

- 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:** Ellsworth Metals Inc → E & F Milling; 1981-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ellsworth Metals-F C L Enterprises → E & F Milling; 1981-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ellsworth Metals-F C L Enterprises → Ellsworth Metals Inc; 1981-12-01 to current/open; source msha-controller-operator-history