# Relationship history for MSHA mine 3609280

Current hierarchy: **Maurice  Diaz → MAURICE DIAZ STONE → CHIDESTER 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:** MAURICE DIAZ STONE → CHIDESTER QUARRY; 2004-09-28 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Maurice  Diaz → CHIDESTER QUARRY; 2004-09-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Maurice  Diaz → MAURICE DIAZ STONE; 2004-09-28 to current/open; source msha-controller-operator-history