# Relationship history for MSHA mine 4503789

Current hierarchy: **Rosa M Lopez-Alanis → Quality Stone Products LLC → R&M Washougal 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

- **controller_controls_mine:** Diane  Cates → R&M Washougal Quarry; 2015-10-06 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** HQ Stone Products → R&M Washougal Quarry; 2018-11-02 to 2019-06-26; source msha-controller-operator-history
- **controller_controls_operator:** Diane  Cates → HQ Stone Products; 2018-11-02 to 2019-06-26; source msha-controller-operator-history
- **operator_operates_mine:** Quality Stone Products LLC → R&M Washougal Quarry; 2019-06-27 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Rosa M Lopez-Alanis → R&M Washougal Quarry; 2019-06-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rosa M Lopez-Alanis → Quality Stone Products LLC; 2019-06-27 to current/open; source msha-controller-operator-history