# Relationship history for MSHA mine 4801516

Current hierarchy: **Arthur D  Boatright II → Mobile Concrete Inc → EL JAY**

- 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

- **controller_controls_mine:** Arthur D  Boatright II → EL JAY; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Mobile Concrete Inc → EL JAY; 1993-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Arthur D  Boatright II → Mobile Concrete Inc; 1993-09-01 to current/open; source msha-controller-operator-history