# Relationship history for MSHA mine 3003488

Current hierarchy: **Arthur H  Leavitt → LEAVITT FARMS INC → LEAVITT 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

- **operator_operates_mine:** Leavitt Farms Inc → LEAVITT SAND & GRAVEL; 2005-04-06 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Arthur H  Leavitt → LEAVITT SAND & GRAVEL; 2005-04-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Arthur H  Leavitt → Leavitt Farms Inc; 2005-04-06 to current/open; source msha-controller-operator-history