# Relationship history for MSHA mine 4105772

Current hierarchy: **Nomad Proppant Holdings LLC → Nomad Proppant Services LLC → Nomad - Midland**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Liberty Oilfield Services LLC et al → Nomad - Midland; 2022-03-18 to 2022-03-18; source msha-controller-operator-history
- **controller_controls_mine:** Nomad Proppant Holdings LLC → Nomad - Midland; 2022-03-19 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Nomad Proppant Services LLC → Nomad - Midland; 2024-09-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Liberty Oilfield Services LLC et al → Nomad Proppant Services LLC; 2024-09-06 to 2022-03-18; source msha-controller-operator-history
- **controller_controls_operator:** Nomad Proppant Holdings LLC et al → Nomad Proppant Services LLC; 2024-09-06 to 2022-03-18; source msha-controller-operator-history
- **controller_controls_operator:** Nomad Proppant Holdings LLC → Nomad Proppant Services LLC; 2024-09-06 to current/open; source msha-controller-operator-history