# Relationship history for MSHA mine 4104356

Current hierarchy: **Fernando  Salazar → Ruby's Stone → Kelly Ranch**

- 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:** Ruby's Stone → Kelly Ranch; 2002-04-16 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Fernando  Salazar → Kelly Ranch; 2002-04-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Fernando  Salazar → Ruby's Stone; 2002-04-16 to current/open; source msha-controller-operator-history