# Relationship history for MSHA mine 2402115

Current hierarchy: **Rick  McDaniel → Sierra Rock & Dirt, Inc. → Sierra Rock & Dirt 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:** Sierra Rock & Dirt, Inc. → Sierra Rock & Dirt Inc; 1997-09-02 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Rick  McDaniel → Sierra Rock & Dirt Inc; 1997-09-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rick  McDaniel → Sierra Rock & Dirt, Inc.; 1997-09-02 to current/open; source msha-controller-operator-history