# Relationship history for MSHA mine 4703611

Current hierarchy: **Iron Oak Energy Solutions LLC → HC Wyeville Operating LLC → HC Wyeville Mine**

- 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:** HC Wyeville Operating LLC → HC Wyeville Mine; 2011-06-18 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Hi-Crush Proppants LLC → HC Wyeville Mine; 2011-06-18 to 2012-08-22; source msha-controller-operator-history
- **controller_controls_operator:** Hi-Crush Proppants LLC → HC Wyeville Operating LLC; 2011-06-18 to 2012-08-22; source msha-controller-operator-history
- **controller_controls_mine:** Hi-Crush Inc → HC Wyeville Mine; 2012-08-23 to 2024-08-04; source msha-controller-operator-history
- **controller_controls_operator:** Hi-Crush Inc → HC Wyeville Operating LLC; 2012-08-23 to 2024-08-04; source msha-controller-operator-history
- **controller_controls_mine:** HC Minerals Inc → HC Wyeville Mine; 2024-08-05 to 2025-08-10; source msha-controller-operator-history
- **controller_controls_operator:** HC Minerals Inc → HC Wyeville Operating LLC; 2024-08-05 to 2025-08-10; source msha-controller-operator-history
- **controller_controls_mine:** Iron Oak Energy Solutions LLC → HC Wyeville Mine; 2025-08-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Iron Oak Energy Solutions LLC → HC Wyeville Operating LLC; 2025-08-11 to current/open; source msha-controller-operator-history