# Relationship history for MSHA mine 0203159

Current hierarchy: **Travis  Anderson; Justin  Anderson → Southwest Crushing LLC → Huachuca**

- 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:** Southwest Crushing LLC → Huachuca; 2007-02-13 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Travis  Anderson et al → Huachuca; 2007-02-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Travis  Anderson et al → Southwest Crushing LLC; 2007-02-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Justin  Anderson et al → Southwest Crushing LLC; 2007-02-13 to current/open; source msha-controller-operator-history