# Relationship history for MSHA mine 2003557

Current hierarchy: **Robert J  Willis → KJW Trucking LLC → KJW**

- 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:** KJW Trucking LLC → KJW; 2018-01-09 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Robert J  Willis → KJW; 2018-01-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert J  Willis → KJW Trucking LLC; 2018-01-09 to current/open; source msha-controller-operator-history