# Relationship history for MSHA mine 4609061

Current hierarchy: **Arch Resources Inc → Vindex Energy Corporation → North Point 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:** Terry  Hovatter → North Point Deep Mine; 1996-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Anker Group Inc → North Point Deep Mine; 1997-02-10 to 2005-11-17; source msha-controller-operator-history
- **operator_operates_mine:** Double H Mining Co., Inc. → North Point Deep Mine; 2004-09-30 to 2008-05-21; source msha-controller-operator-history
- **controller_controls_operator:** Terry  Hovatter → Double H Mining Co., Inc.; 2004-09-30 to 2008-05-21; source msha-controller-operator-history
- **controller_controls_mine:** International Coal Group Inc (ICG) → North Point Deep Mine; 2005-11-18 to 2011-06-14; source msha-controller-operator-history
- **operator_operates_mine:** Vindex Energy Corporation → North Point Deep Mine; 2008-05-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** International Coal Group Inc (ICG) → Vindex Energy Corporation; 2008-05-22 to 2011-06-14; source msha-controller-operator-history
- **controller_controls_operator:** Anker Group Inc → Vindex Energy Corporation; 2008-05-22 to 2005-11-17; source msha-controller-operator-history
- **controller_controls_mine:** Arch Resources Inc → North Point Deep Mine; 2011-06-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Arch Resources Inc → Vindex Energy Corporation; 2011-06-15 to current/open; source msha-controller-operator-history