# Relationship history for MSHA mine 4503778

Current hierarchy: **Sam  Stakkeland → C&S Construction → C&S Construction Mobile Crushing**

- 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:** C&S Construction → C&S Construction Mobile Crushing; 2018-03-23 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Sam  Stakkeland → C&S Construction Mobile Crushing; 2018-03-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Sam  Stakkeland → C&S Construction; 2018-03-23 to current/open; source msha-controller-operator-history