# Relationship history for MSHA mine 3608508

Current hierarchy: **Quintana Capital Group GP Ltd → RoxCoal, Inc → Barbara #2 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:** NSM PLC → Barbara #2 Mine; 1990-06-18 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Rox Coal Inc → Barbara #2 Mine; 1995-03-01 to 1998-03-05; source msha-controller-operator-history
- **controller_controls_operator:** NSM PLC → Rox Coal Inc; 1995-03-01 to 1998-03-05; source msha-controller-operator-history
- **operator_operates_mine:** Rox Coal Inc → Barbara #2 Mine; 1998-03-06 to 2000-01-09; source msha-controller-operator-history
- **controller_controls_mine:** Severstal Resources → Barbara #2 Mine; 1998-03-06 to 2014-08-19; source msha-controller-operator-history
- **controller_controls_operator:** Severstal Resources → Rox Coal Inc; 1998-03-06 to 2000-01-09; source msha-controller-operator-history
- **operator_operates_mine:** Dunmire Resources Inc → Barbara #2 Mine; 2000-01-10 to 2001-05-20; source msha-controller-operator-history
- **controller_controls_mine:** Thomas L  Dunmire → Barbara #2 Mine; 2000-01-10 to 2001-05-20; source msha-controller-operator-history
- **controller_controls_operator:** Thomas L  Dunmire → Dunmire Resources Inc; 2000-01-10 to 2001-05-20; source msha-controller-operator-history
- **operator_operates_mine:** RoxCoal, Inc → Barbara #2 Mine; 2001-05-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Severstal Resources → RoxCoal, Inc; 2001-05-21 to 2014-08-19; source msha-controller-operator-history
- **controller_controls_mine:** Quintana Capital Group GP Ltd et al → Barbara #2 Mine; 2014-08-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Quintana Capital Group GP Ltd et al → Rox Coal Inc; 2014-08-20 to 2000-01-09; 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