# Relationship history for MSHA mine 3502579

Current hierarchy: **Needy Brick & Tile Company Inc → Needy Brick & Tile Company Inc → Needy 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:** Needy Brick & Tile Company Inc → Needy Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Needy Brick & Tile Company Inc → Needy Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Needy Brick & Tile Company Inc → Needy Brick & Tile Company Inc; 1950-01-01 to current/open; source msha-controller-operator-history