# Relationship history for MSHA mine 0203327

Current hierarchy: **Matt  Klump → Arizona Marble Company → Arizona Marble Company**

- 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:** The White Marble Quarry AZ, LLC → Arizona Marble Company; 2013-11-19 to 2016-07-24; source msha-controller-operator-history
- **controller_controls_mine:** Enrico L  Luciani → Arizona Marble Company; 2013-11-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Enrico L  Luciani → The White Marble Quarry AZ, LLC; 2013-11-19 to 2016-07-24; source msha-controller-operator-history
- **operator_operates_mine:** Arizona Marble Company → Arizona Marble Company; 2016-07-25 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Matt  Klump → Arizona Marble Company; 2016-07-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Matt  Klump → Arizona Marble Company; 2016-07-25 to current/open; source msha-controller-operator-history