# Relationship history for MSHA mine 2902279

Current hierarchy: **Dave C  Sanders → South Slope Crushing & Caliche → South Slope Crushing &  Caliche**

- 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:** South Slope Crushing & Caliche → South Slope Crushing &  Caliche; 2005-03-30 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Dave C  Sanders → South Slope Crushing &  Caliche; 2005-03-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dave C  Sanders → South Slope Crushing & Caliche; 2005-03-30 to current/open; source msha-controller-operator-history