# Relationship history for MSHA mine 0201070

Current hierarchy: **Thomas M Valente → Phoenix Redi-Mix Company Inc → PHOENIX REDI-MIX**

- 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:** Phoenix Redi-Mix Company Inc → PHOENIX REDI-MIX; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Thomas M Valente → PHOENIX REDI-MIX; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Thomas M Valente → Phoenix Redi-Mix Company Inc; 1950-01-01 to current/open; source msha-controller-operator-history