# Relationship history for MSHA mine 0203428

Current hierarchy: **Wade S  Ruane → Desert Queen Quarry LLC → Desert Queen**

- 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:** Alex & Alex LLC → Desert Queen; 2020-02-25 to 2026-05-25; source msha-controller-operator-history
- **controller_controls_mine:** Alejandro S  Saldivar et al → Desert Queen; 2020-02-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Alejandro S  Saldivar et al → Alex & Alex LLC; 2020-02-25 to 2026-05-25; source msha-controller-operator-history
- **controller_controls_operator:** Alejandro O  Saldivar et al → Alex & Alex LLC; 2020-02-25 to 2026-05-25; source msha-controller-operator-history
- **operator_operates_mine:** Desert Queen Quarry LLC → Desert Queen; 2026-05-26 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Wade S  Ruane → Desert Queen; 2026-05-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Wade S  Ruane → Desert Queen Quarry LLC; 2026-05-26 to current/open; source msha-controller-operator-history