# Relationship history for MSHA mine 4202343

Current hierarchy: **Gary I  Carlisle → Valley Rock Products Inc. → Valley Rock Portable**

- 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:** Valley Rock Products Inc. → Valley Rock Portable; 2002-05-08 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Gary I  Carlisle → Valley Rock Portable; 2002-05-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gary I  Carlisle → Valley Rock Products Inc.; 2002-05-08 to current/open; source msha-controller-operator-history