# Relationship history for MSHA mine 3608214

Current hierarchy: **Quintana Capital Group GP Ltd → Rox Coal Inc → Diamond T C 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 → Diamond T C Mine; 1990-06-18 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Rox Coal Inc → Diamond T C Mine; 1990-12-01 to 1998-01-12; source msha-controller-operator-history
- **controller_controls_operator:** NSM PLC → Rox Coal Inc; 1990-12-01 to 1998-01-12; source msha-controller-operator-history
- **operator_operates_mine:** Rox Coal Inc → Diamond T C Mine; 1998-01-13 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Severstal Resources → Diamond T C 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 2014-08-19; source msha-controller-operator-history
- **controller_controls_mine:** Quintana Capital Group GP Ltd et al → Diamond T C 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 current/open; source msha-controller-operator-history