# Relationship history for MSHA mine 0404888

Current hierarchy: **Silva Clarence → Fred Silva Enterprises → Artru**

- 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:** Fred Silva Enterprises → Artru; 1987-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Silva Clarence → Artru; 1987-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Silva Clarence → Fred Silva Enterprises; 1987-07-01 to current/open; source msha-controller-operator-history