# Relationship history for MSHA mine 1601320

Current hierarchy: **Quikrete Holdings Inc. → Quikrete Companies → Quikrete of New Orleans**

- 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:** Southern Quikrete Products Inc → Quikrete of New Orleans; 1997-10-01 to 1998-09-10; source msha-controller-operator-history
- **controller_controls_mine:** Jerome L  Tujague Jr → Quikrete of New Orleans; 1997-10-01 to 1998-09-10; source msha-controller-operator-history
- **controller_controls_operator:** Jerome L  Tujague Jr → Southern Quikrete Products Inc; 1997-10-01 to 1998-09-10; source msha-controller-operator-history
- **operator_operates_mine:** Quikrete Companies → Quikrete of New Orleans; 1998-09-11 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Quikrete Holdings Inc. → Quikrete of New Orleans; 1998-09-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Quikrete Holdings Inc. → Quikrete Companies; 1998-09-11 to current/open; source msha-controller-operator-history