# Relationship history for MSHA mine 4104922

Current hierarchy: **Paul  Perry; Brad  West → Prime Materials , LLC → Prime Materials LLC**

- 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:** Prime Materials , LLC → Prime Materials LLC; 2012-01-05 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Brad  West et al → Prime Materials LLC; 2012-01-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brad  West et al → Prime Materials , LLC; 2012-01-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Paul  Perry et al → Prime Materials , LLC; 2012-01-05 to current/open; source msha-controller-operator-history