# Relationship history for MSHA mine 4105627

Current hierarchy: **Abel  Molina; Ray  Hernandez; Joseph  Hitzfeld → Eagle Frac Sand Company, LLC → Caterina #1**

- 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 Texas Sand and Logistics LLC → Caterina #1; 2022-05-10 to 2023-03-27; source msha-controller-operator-history
- **controller_controls_mine:** David  Villa et al → Caterina #1; 2022-05-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David  Villa et al → South Texas Sand and Logistics LLC; 2022-05-10 to 2023-03-27; source msha-controller-operator-history
- **controller_controls_operator:** Stillman  Maxon et al → South Texas Sand and Logistics LLC; 2022-05-10 to 2023-03-27; source msha-controller-operator-history
- **controller_controls_operator:** George  Hamilton et al → South Texas Sand and Logistics LLC; 2022-05-10 to 2023-03-27; source msha-controller-operator-history
- **operator_operates_mine:** Eagle Frac Sand Company, LLC → Caterina #1; 2023-03-28 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ray  Hernandez et al → Caterina #1; 2023-03-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ray  Hernandez et al → Eagle Frac Sand Company, LLC; 2023-03-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Joseph  Hitzfeld et al → Eagle Frac Sand Company, LLC; 2023-03-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Abel  Molina et al → Eagle Frac Sand Company, LLC; 2023-03-28 to current/open; source msha-controller-operator-history