# Relationship history for MSHA mine 0504729

Current hierarchy: **Arthur  Vasquez → O & A Stone Company → M. Vasquez Quarry**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Interstate Stone LLC → M. Vasquez Quarry; 2001-10-31 to 2005-05-01; source msha-controller-operator-history
- **controller_controls_mine:** Lucio  Vasquez et al → M. Vasquez Quarry; 2001-10-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lucio  Vasquez et al → Interstate Stone LLC; 2001-10-31 to 2005-05-01; source msha-controller-operator-history
- **controller_controls_operator:** Phil  Vasquez et al → Interstate Stone LLC; 2001-10-31 to 2005-05-01; source msha-controller-operator-history
- **controller_controls_mine:** Arthur  Vasquez → M. Vasquez Quarry; 2001-11-08 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** O & A Stone Company → M. Vasquez Quarry; 2005-05-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Arthur  Vasquez → O & A Stone Company; 2005-05-02 to current/open; source msha-controller-operator-history