# Relationship history for MSHA mine 3003558

Current hierarchy: **Quikrete Holdings Inc. → Quikrete Companies Inc → Quikrete SYR 560**

- 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

- **controller_controls_mine:** Quikrete Holdings Inc. → Quikrete SYR 560; 1998-09-11 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Quikrete Companies Inc → Quikrete SYR 560; 2006-08-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Quikrete Holdings Inc. → Quikrete Companies Inc; 2006-08-02 to current/open; source msha-controller-operator-history