# Relationship history for MSHA mine 4105320

Current hierarchy: **Pro Frac Holding Corp → Alpine Silica LLC → Alpine Silica-Monahans**

- 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

- **controller_controls_mine:** Wilks Brothers LLC → Alpine Silica-Monahans; 2017-11-13 to 2022-10-09; source msha-controller-operator-history
- **operator_operates_mine:** Alpine Monahans, LLC → Alpine Silica-Monahans; 2018-01-04 to 2024-01-31; source msha-controller-operator-history
- **controller_controls_mine:** Mike  O'Neill et al → Alpine Silica-Monahans; 2018-01-04 to 2019-02-07; source msha-controller-operator-history
- **controller_controls_operator:** Mike  O'Neill et al → Alpine Monahans, LLC; 2018-01-04 to 2019-02-07; source msha-controller-operator-history
- **controller_controls_mine:** Orchard Global Asset Management LLP → Alpine Silica-Monahans; 2019-02-08 to 2022-07-25; source msha-controller-operator-history
- **controller_controls_operator:** Orchard Global Asset Management LLP → Alpine Monahans, LLC; 2019-02-08 to 2022-07-25; source msha-controller-operator-history
- **controller_controls_mine:** Pro Frac Holding Corp → Alpine Silica-Monahans; 2022-07-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Pro Frac Holding Corp → Alpine Monahans, LLC; 2022-07-26 to 2024-01-31; source msha-controller-operator-history
- **controller_controls_mine:** Pro Frac Holding Corp → Alpine Silica-Monahans; 2022-10-10 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Alpine Silica LLC → Alpine Silica-Monahans; 2024-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Wilks Brothers LLC → Alpine Silica LLC; 2024-02-01 to 2022-10-09; source msha-controller-operator-history
- **controller_controls_operator:** Pro Frac Holding Corp → Alpine Silica LLC; 2024-02-01 to current/open; source msha-controller-operator-history