# Relationship history for MSHA mine 4703675

Current hierarchy: **Mammoth Energy Services → Piranha Proppant, LLC → Piranha Proppant-Load Out Facility**

- 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:** Chieftain Sand and Proppant LLC → Piranha Proppant-Load Out Facility; 2012-08-02 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Chieftain Sand and Proppant Barron, LLC → Piranha Proppant-Load Out Facility; 2012-10-19 to 2017-05-25; source msha-controller-operator-history
- **controller_controls_operator:** Chieftain Sand and Proppant LLC → Chieftain Sand and Proppant Barron, LLC; 2012-10-19 to 2017-05-25; source msha-controller-operator-history
- **operator_operates_mine:** Piranha Proppant, LLC → Piranha Proppant-Load Out Facility; 2017-05-26 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Mammoth Energy Services → Piranha Proppant-Load Out Facility; 2017-05-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mammoth Energy Services → Piranha Proppant, LLC; 2017-05-26 to current/open; source msha-controller-operator-history