# Relationship history for MSHA mine 1900372

Current hierarchy: **Leo  Ouellette Jr → Westfield Ready- Mix Inc. → Westfield Properties, Inc.**

- 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:** Westfield Sand & Gravel Company Inc → Westfield Properties, Inc.; 1950-01-01 to 1986-04-21; source msha-controller-operator-history
- **controller_controls_mine:** James F  Wzorek → Westfield Properties, Inc.; 1950-01-01 to 1986-04-21; source msha-controller-operator-history
- **controller_controls_operator:** James F  Wzorek → Westfield Sand & Gravel Company Inc; 1950-01-01 to 1986-04-21; source msha-controller-operator-history
- **operator_operates_mine:** Westfield Sand & Gravel Company Inc → Westfield Properties, Inc.; 1986-04-22 to 2008-06-30; source msha-controller-operator-history
- **controller_controls_mine:** D P C Enterprises Inc → Westfield Properties, Inc.; 1986-04-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** D P C Enterprises Inc → Westfield Sand & Gravel Company Inc; 1986-04-22 to 2008-06-30; source msha-controller-operator-history
- **operator_operates_mine:** Westfield Ready- Mix Inc. → Westfield Properties, Inc.; 2008-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Leo  Ouellette Jr → Westfield Properties, Inc.; 2008-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Leo  Ouellette Jr → Westfield Ready- Mix Inc.; 2008-07-01 to current/open; source msha-controller-operator-history