# Relationship history for MSHA mine 4702820

Current hierarchy: **Cretex Companies Inc → Cretex Materials Inc → Warren 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

- **controller_controls_mine:** Cretex Companies Inc → Warren Quarry; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Lembezeder Sand & Gravel → Warren Quarry; 1985-11-01 to 1991-12-22; source msha-controller-operator-history
- **controller_controls_mine:** Miami Stone Sales Of Wisconsin Inccorporated → Warren Quarry; 1985-11-01 to 1991-12-22; source msha-controller-operator-history
- **controller_controls_operator:** Miami Stone Sales Of Wisconsin Inccorporated → Lembezeder Sand & Gravel; 1985-11-01 to 1991-12-22; source msha-controller-operator-history
- **operator_operates_mine:** Cretex Sand & Gravel Inc → Warren Quarry; 1991-12-23 to 2009-03-10; source msha-controller-operator-history
- **controller_controls_mine:** Cretex Companies Inc → Warren Quarry; 1991-12-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cretex Companies Inc → Cretex Sand & Gravel Inc; 1991-12-23 to 2009-03-10; source msha-controller-operator-history
- **operator_operates_mine:** JW Peters Inc → Warren Quarry; 2009-03-11 to 2010-01-03; source msha-controller-operator-history
- **controller_controls_operator:** Cretex Companies Inc → JW Peters Inc; 2009-03-11 to 2010-01-03; source msha-controller-operator-history
- **operator_operates_mine:** Cretex Materials Inc → Warren Quarry; 2010-01-04 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Cretex Companies Inc → Warren Quarry; 2010-01-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cretex Companies Inc → Cretex Materials Inc; 2010-01-04 to current/open; source msha-controller-operator-history