# Relationship history for MSHA mine 3609260

Current hierarchy: **Quintana Capital Group GP Ltd → RoxCoal, Inc. → Roytown Deep 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:** Severstal Resources → Roytown Deep Mine; 1998-03-06 to 2014-08-19; source msha-controller-operator-history
- **operator_operates_mine:** RoxCoal Inc → Roytown Deep Mine; 2004-07-01 to 2008-09-10; source msha-controller-operator-history
- **controller_controls_operator:** Severstal Resources → RoxCoal Inc; 2004-07-01 to 2008-09-10; source msha-controller-operator-history
- **controller_controls_mine:** Severstal Resources → Roytown Deep Mine; 2004-09-13 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Elk Lick Energy Inc → Roytown Deep Mine; 2008-09-11 to 2009-03-26; source msha-controller-operator-history
- **controller_controls_operator:** Severstal Resources → Elk Lick Energy Inc; 2008-09-11 to 2009-03-26; source msha-controller-operator-history
- **operator_operates_mine:** RoxCoal, Inc. → Roytown Deep Mine; 2009-03-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Severstal Resources → RoxCoal, Inc.; 2009-03-27 to 2014-08-19; source msha-controller-operator-history
- **controller_controls_mine:** Quintana Capital Group GP Ltd et al → Roytown Deep 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