# Relationship history for MSHA mine 3608746

Current hierarchy: **Quintana Capital Group GP Ltd → RoxCoal, Inc. → Quecreek #1 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

- **controller_controls_mine:** Severstal Resources → Quecreek #1 Mine; 1998-03-06 to 2014-08-19; source msha-controller-operator-history
- **operator_operates_mine:** Black Wolf Coal Company Inc → Quecreek #1 Mine; 1998-08-01 to 2008-05-20; source msha-controller-operator-history
- **controller_controls_mine:** Severstal Resources → Quecreek #1 Mine; 1998-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Severstal Resources → Black Wolf Coal Company Inc; 1998-08-01 to 2008-05-20; source msha-controller-operator-history
- **operator_operates_mine:** RoxCoal, Inc. → Quecreek #1 Mine; 2008-05-21 to 2008-09-10; source msha-controller-operator-history
- **controller_controls_operator:** Severstal Resources → RoxCoal, Inc.; 2008-05-21 to 2008-09-10; source msha-controller-operator-history
- **operator_operates_mine:** Quecreek Mining Inc. → Quecreek #1 Mine; 2008-09-11 to 2009-03-11; source msha-controller-operator-history
- **controller_controls_mine:** Severstal Resources → Quecreek #1 Mine; 2008-09-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Severstal Resources → Quecreek Mining Inc.; 2008-09-11 to 2009-03-11; source msha-controller-operator-history
- **operator_operates_mine:** RoxCoal, Inc. → Quecreek #1 Mine; 2009-03-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Severstal Resources → RoxCoal, Inc.; 2009-03-12 to 2014-08-19; source msha-controller-operator-history
- **controller_controls_mine:** Quintana Capital Group GP Ltd et al → Quecreek #1 Mine; 2014-08-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Quintana Capital Group GP Ltd et al → RoxCoal, Inc.; 2014-08-20 to 2008-09-10; source msha-controller-operator-history
- **controller_controls_operator:** Quintana Capital Group GP Ltd et al → RoxCoal, Inc.; 2014-08-20 to current/open; source msha-controller-operator-history