# Relationship history for MSHA mine 4003466

Current hierarchy: **Alejandro  Veracruz Martinez → Alver Stone LLC → alver's 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:** Alver Stone LLC → alver's quarry; 2017-02-09 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Alejandro  Veracruz Martinez → alver's quarry; 2017-02-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Alejandro  Veracruz Martinez → Alver Stone LLC; 2017-02-09 to current/open; source msha-controller-operator-history