# Relationship history for MSHA mine 4105321

Current hierarchy: **Liberty Energy Inc → Freedom Proppant L.L.C. → Freedom Proppant Kermit 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:** High Roller Sand Operating LLC → Freedom Proppant Kermit Mine; 2017-12-15 to 2018-07-19; source msha-controller-operator-history
- **controller_controls_mine:** Stephen  Greak et al → Freedom Proppant Kermit Mine; 2017-12-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Stephen  Greak et al → High Roller Sand Operating LLC; 2017-12-15 to 2018-07-19; source msha-controller-operator-history
- **controller_controls_operator:** Dustin  Bailey et al → High Roller Sand Operating LLC; 2017-12-15 to 2018-07-19; source msha-controller-operator-history
- **operator_operates_mine:** High Roller Sand Management LLC → Freedom Proppant Kermit Mine; 2018-07-20 to 2022-01-30; source msha-controller-operator-history
- **controller_controls_mine:** Stephen  Greak et al → Freedom Proppant Kermit Mine; 2018-07-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Stephen  Greak et al → High Roller Sand Management LLC; 2018-07-20 to 2022-01-30; source msha-controller-operator-history
- **controller_controls_operator:** Dustin  Bailey et al → High Roller Sand Management LLC; 2018-07-20 to 2022-01-30; source msha-controller-operator-history
- **operator_operates_mine:** LOS Kermit LLC → Freedom Proppant Kermit Mine; 2022-01-31 to 2025-01-14; source msha-controller-operator-history
- **controller_controls_mine:** Liberty Energy Inc → Freedom Proppant Kermit Mine; 2022-01-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Liberty Energy Inc → LOS Kermit LLC; 2022-01-31 to 2025-01-14; source msha-controller-operator-history
- **operator_operates_mine:** Freedom Proppant L.L.C. → Freedom Proppant Kermit Mine; 2025-01-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Liberty Energy Inc → Freedom Proppant L.L.C.; 2025-01-15 to current/open; source msha-controller-operator-history