# Relationship history for MSHA mine 2402191

Current hierarchy: **N James  Bryson → Jim Bryson Trucking Inc → PORTABLE SCREEN PLANT**

- 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:** Jim Bryson Trucking Inc → PORTABLE SCREEN PLANT; 2000-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** N James  Bryson → PORTABLE SCREEN PLANT; 2000-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** N James  Bryson → Jim Bryson Trucking Inc; 2000-05-01 to current/open; source msha-controller-operator-history