# Relationship history for MSHA mine 4202437

Current hierarchy: **Thomas B  Rhoades → Peterson Point Rock Products, Inc. → Peterson Point Rock Products, 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:** Peterson Point Rock Products, Inc. → Peterson Point Rock Products, Inc.; 2006-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Thomas B  Rhoades → Peterson Point Rock Products, Inc.; 2006-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Thomas B  Rhoades → Peterson Point Rock Products, Inc.; 2006-04-01 to current/open; source msha-controller-operator-history