# Relationship history for MSHA mine 4703665

Current hierarchy: **Mammoth Energy Services → Piranha Proppant → Anderson Property**

- 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

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