# Relationship history for MSHA mine 3002324

Current hierarchy: **Hurtubise James A → West Winfield Sand & Gravel Corp → West Winfield Plant**

- 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:** Edward  Hayes → West Winfield Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Hurtubise James A → West Winfield Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Special Aggregates Corp → West Winfield Plant; 1978-03-09 to 1979-10-16; source msha-controller-operator-history
- **controller_controls_operator:** Edward  Hayes → Special Aggregates Corp; 1978-03-09 to 1979-10-16; source msha-controller-operator-history
- **operator_operates_mine:** West Winfield Sand & Gravel Corp → West Winfield Plant; 1979-10-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hurtubise James A → West Winfield Sand & Gravel Corp; 1979-10-17 to current/open; source msha-controller-operator-history