# Relationship history for MSHA mine 4202415

Current hierarchy: **Noal S Hansen → Bruce H Hansen Stone Quarries → Moenkopi Moca**

- 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:** Bruce H Hansen Stone Quarries → Moenkopi Moca; 2005-07-19 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Noal S Hansen → Moenkopi Moca; 2005-07-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Noal S Hansen → Bruce H Hansen Stone Quarries; 2005-07-19 to current/open; source msha-controller-operator-history