# Relationship history for MSHA mine 2402320

Current hierarchy: **Angelo N  Ververis → Superior Rock Sand & Gravel → Superior Rock Sand & Gravel**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **operator_operates_mine:** Western Reclamation LLC → Superior Rock Sand & Gravel; 2003-04-01 to 2008-05-13; source msha-controller-operator-history
- **controller_controls_mine:** Kenneth D  Verley → Superior Rock Sand & Gravel; 2003-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kenneth D  Verley → Western Reclamation LLC; 2003-04-01 to 2008-05-13; source msha-controller-operator-history
- **operator_operates_mine:** Superior Rock Sand & Gravel → Superior Rock Sand & Gravel; 2008-05-14 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Angelo N  Ververis → Superior Rock Sand & Gravel; 2008-05-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Angelo N  Ververis → Superior Rock Sand & Gravel; 2008-05-14 to current/open; source msha-controller-operator-history