# Relationship history for MSHA mine 4003443

Current hierarchy: **Industrial Minerals Group LLC → Kopper Glo Mining, LLC → Clear Fork Surface 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Quintana Capital Group GP Ltd et al → Clear Fork Surface Mine; 2009-06-02 to 2018-12-30; source msha-controller-operator-history
- **operator_operates_mine:** Kopper Glo Mining, LLC → Clear Fork Surface Mine; 2014-10-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Quintana Capital Group GP Ltd et al → Kopper Glo Mining, LLC; 2014-10-20 to 2018-12-30; source msha-controller-operator-history
- **controller_controls_mine:** Industrial Minerals Group LLC → Clear Fork Surface Mine; 2018-12-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Industrial Minerals Group LLC → Kopper Glo Mining, LLC; 2018-12-31 to current/open; source msha-controller-operator-history