# Relationship history for MSHA mine 3600075

Current hierarchy: **James D  Morrissey III → Eureka Stone Quarry Inc → Warrington 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Eureka Stone Quarry Inc → Warrington Quarry; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** James D  Morrissey Jr → Warrington Quarry; 1950-01-01 to 2025-10-15; source msha-controller-operator-history
- **controller_controls_operator:** James D  Morrissey Jr → Eureka Stone Quarry Inc; 1950-01-01 to 2025-10-15; source msha-controller-operator-history
- **controller_controls_mine:** James D  Morrissey III → Warrington Quarry; 2025-10-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James D  Morrissey III → Eureka Stone Quarry Inc; 2025-10-16 to current/open; source msha-controller-operator-history