# Relationship history for MSHA mine 4801736

Current hierarchy: **Arthur D  Boatright II → Mobile Concrete, Inc. → JCI K200-6203CC**

- 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 → JCI K200-6203CC; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Mobile Concrete, Inc. → JCI K200-6203CC; 2009-04-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Arthur D  Boatright II → Mobile Concrete, Inc.; 2009-04-23 to current/open; source msha-controller-operator-history