# Relationship history for MSHA mine 0405175

Current hierarchy: **Fay R  Ray → Cima Cinder Quarry → CIMA CINDER 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Cima Cinder Quarry → CIMA CINDER QUARRY; 1992-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Fay R  Ray → CIMA CINDER QUARRY; 1992-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Fay R  Ray → Cima Cinder Quarry; 1992-02-01 to current/open; source msha-controller-operator-history