# Relationship history for MSHA mine 4609369

Current hierarchy: **Arch Resources Inc → Vindex Energy LLC → Bismarck  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:** Anker Group Inc → Bismarck  Mine; 1997-02-10 to 2005-11-17; source msha-controller-operator-history
- **controller_controls_mine:** International Coal Group Inc (ICG) → Bismarck  Mine; 2005-11-18 to 2011-06-14; source msha-controller-operator-history
- **operator_operates_mine:** Vindex Energy Corp, → Bismarck  Mine; 2010-03-09 to 2014-12-15; source msha-controller-operator-history
- **controller_controls_operator:** International Coal Group Inc (ICG) → Vindex Energy Corp,; 2010-03-09 to 2011-06-14; source msha-controller-operator-history
- **controller_controls_operator:** Anker Group Inc → Vindex Energy Corp,; 2010-03-09 to 2005-11-17; source msha-controller-operator-history
- **controller_controls_mine:** Arch Resources Inc → Bismarck  Mine; 2011-06-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Arch Resources Inc → Vindex Energy Corp,; 2011-06-15 to 2014-12-15; source msha-controller-operator-history
- **operator_operates_mine:** Taylor Minerals, Inc. → Bismarck  Mine; 2014-12-16 to 2015-10-25; source msha-controller-operator-history
- **controller_controls_mine:** Freddie A  Taylor → Bismarck  Mine; 2014-12-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Freddie A  Taylor → Taylor Minerals, Inc.; 2014-12-16 to 2015-10-25; source msha-controller-operator-history
- **operator_operates_mine:** Vindex Energy LLC → Bismarck  Mine; 2015-10-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** International Coal Group Inc (ICG) → Vindex Energy LLC; 2015-10-26 to 2011-06-14; source msha-controller-operator-history
- **controller_controls_operator:** Anker Group Inc → Vindex Energy LLC; 2015-10-26 to 2005-11-17; source msha-controller-operator-history
- **controller_controls_operator:** Arch Resources Inc → Vindex Energy LLC; 2015-10-26 to current/open; source msha-controller-operator-history