# Relationship history for MSHA mine 4202512

Current hierarchy: **Cardinal Energy Holdings, LLC; Questerre Energy Corp → Red Leaf Resources → Southwest #1**

- 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

- **operator_operates_mine:** Red Leaf Resources → Southwest #1; 2008-08-20 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Cardinal Energy Holdings LLC et al → Southwest #1; 2008-08-20 to 2019-12-20; source msha-controller-operator-history
- **controller_controls_operator:** Cardinal Energy Holdings LLC et al → Red Leaf Resources; 2008-08-20 to 2019-12-20; source msha-controller-operator-history
- **controller_controls_operator:** PWP Xerion Holding III LLC et al → Red Leaf Resources; 2008-08-20 to 2019-12-20; source msha-controller-operator-history
- **controller_controls_mine:** Questerre Energy Corp et al → Southwest #1; 2019-12-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Questerre Energy Corp et al → Red Leaf Resources; 2019-12-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cardinal Energy Holdings, LLC et al → Red Leaf Resources; 2019-12-21 to current/open; source msha-controller-operator-history