# Relationship history for MSHA mine 4703942

Current hierarchy: **Ed  Livingston → Integrity Sales & Auction → Natso Screen 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

- **operator_operates_mine:** Integrity Sales & Auction → Natso Screen Plant; 2023-06-22 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ed  Livingston → Natso Screen Plant; 2023-06-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ed  Livingston → Integrity Sales & Auction; 2023-06-22 to current/open; source msha-controller-operator-history