# Relationship history for MSHA mine 0203096

Current hierarchy: **David M  Varon; Victoria  Green → Alpha Exploration LLC → Alpha Exploration**

- 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:** Alpha Exploration LLC → Alpha Exploration; 2006-02-26 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** David M  Varon  et al → Alpha Exploration; 2006-02-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David M  Varon  et al → Alpha Exploration LLC; 2006-02-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Victoria  Green  et al → Alpha Exploration LLC; 2006-02-26 to current/open; source msha-controller-operator-history