# Relationship history for MSHA mine 1900983

Current hierarchy: **Antes Max → Max Antes Inc → Leveritt Pit And 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:** Max Antes Inc → Leveritt Pit And Plant; 1980-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Antes Max → Leveritt Pit And Plant; 1980-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Antes Max → Max Antes Inc; 1980-06-01 to current/open; source msha-controller-operator-history