# Relationship history for MSHA mine 1601374

Current hierarchy: **Richard Paul  Andrews → Andrews Trucking Inc. → Andrews Trucking Inc.**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Aimwell Aggregates Inc → Andrews Trucking Inc.; 2001-02-01 to 2003-06-23; source msha-controller-operator-history
- **controller_controls_mine:** Richard  Richardson → Andrews Trucking Inc.; 2001-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Richard  Richardson → Aimwell Aggregates Inc; 2001-02-01 to 2003-06-23; source msha-controller-operator-history
- **operator_operates_mine:** Andrews Trucking Inc. → Andrews Trucking Inc.; 2003-06-24 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Richard Paul  Andrews → Andrews Trucking Inc.; 2003-06-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Richard Paul  Andrews → Andrews Trucking Inc.; 2003-06-24 to current/open; source msha-controller-operator-history