# Relationship history for MSHA mine 1002073

Current hierarchy: **Brad T  O'Connell → O'CONNELL TRUCKING INC → PORTABLE PLANT 1**

- 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:** O'CONNELL TRUCKING INC → PORTABLE PLANT 1; 2005-05-17 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Brad T  O'Connell → PORTABLE PLANT 1; 2005-05-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brad T  O'Connell → O'CONNELL TRUCKING INC; 2005-05-17 to current/open; source msha-controller-operator-history