# Relationship history for MSHA mine 0302100

Current hierarchy: **Atlas Asphalt Corp → White River Materials Inc → WRM Yellville Quarry**

- 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

- **controller_controls_mine:** Atlas Asphalt Corp → WRM Yellville Quarry; 1993-10-14 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** White River Materials Inc → WRM Yellville Quarry; 2025-11-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Atlas Asphalt Corp → White River Materials Inc; 2025-11-20 to current/open; source msha-controller-operator-history