# Relationship history for MSHA mine 0202415

Current hierarchy: **Margaret F  Adams → AZ Central Landscape Materials → AZ Central Landscape Materials**

- 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:** Margaret F  Adams → AZ Central Landscape Materials; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Central Arizona Material → AZ Central Landscape Materials; 1988-02-01 to 2001-09-23; source msha-controller-operator-history
- **controller_controls_mine:** Margaret F  Adams → AZ Central Landscape Materials; 1988-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Margaret F  Adams → Central Arizona Material; 1988-02-01 to 2001-09-23; source msha-controller-operator-history
- **operator_operates_mine:** RED MOUNTAIN MINING → AZ Central Landscape Materials; 2001-09-24 to 2003-10-02; source msha-controller-operator-history
- **controller_controls_operator:** Margaret F  Adams → RED MOUNTAIN MINING; 2001-09-24 to 2003-10-02; source msha-controller-operator-history
- **operator_operates_mine:** AZ Central Landscape Materials → AZ Central Landscape Materials; 2003-10-03 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Margaret F  Adams → AZ Central Landscape Materials; 2003-10-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Margaret F  Adams → AZ Central Landscape Materials; 2003-10-03 to current/open; source msha-controller-operator-history