# Relationship history for MSHA mine 4300561

Current hierarchy: **Heath H  Wright → Wright'S Excavating Inc → WRIGHT SAND & GRAVEL**

- 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

- **controller_controls_mine:** Roger H  Wright → WRIGHT SAND & GRAVEL; 1999-07-01 to 2023-01-12; source msha-controller-operator-history
- **operator_operates_mine:** Wright'S Excavating Inc → WRIGHT SAND & GRAVEL; 2001-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Roger H  Wright → Wright'S Excavating Inc; 2001-06-01 to 2023-01-12; source msha-controller-operator-history
- **controller_controls_mine:** Heath H  Wright → WRIGHT SAND & GRAVEL; 2023-01-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Heath H  Wright → Wright'S Excavating Inc; 2023-01-13 to current/open; source msha-controller-operator-history