# Relationship history for MSHA mine 1800769

Current hierarchy: **KTRV LLC → Heritage Coal & Natural Resources, LLC → Carlos Surface**

- 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 → Carlos Surface; 1997-02-10 to 2005-11-17; source msha-controller-operator-history
- **operator_operates_mine:** Vindex Energy Corporation → Carlos Surface; 2005-10-24 to 2016-04-24; source msha-controller-operator-history
- **controller_controls_operator:** Anker Group Inc → Vindex Energy Corporation; 2005-10-24 to 2005-11-17; source msha-controller-operator-history
- **controller_controls_mine:** International Coal Group Inc (ICG) → Carlos Surface; 2005-11-18 to 2011-06-14; source msha-controller-operator-history
- **controller_controls_operator:** International Coal Group Inc (ICG) → Vindex Energy Corporation; 2005-11-18 to 2011-06-14; source msha-controller-operator-history
- **controller_controls_mine:** Jody L  Ritchie → Carlos Surface; 2007-11-30 to 2022-03-15; source msha-controller-operator-history
- **controller_controls_mine:** Angela  Svonavec → Carlos Surface; 2008-09-03 to 2024-02-04; source msha-controller-operator-history
- **controller_controls_mine:** Arch Resources Inc → Carlos Surface; 2011-06-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Arch Resources Inc → Vindex Energy Corporation; 2011-06-15 to 2016-04-24; source msha-controller-operator-history
- **operator_operates_mine:** Heritage Coal & Natural Resources, LLC → Carlos Surface; 2016-04-25 to 2016-11-27; source msha-controller-operator-history
- **controller_controls_operator:** Angela  Svonavec → Heritage Coal & Natural Resources, LLC; 2016-04-25 to 2016-11-27; source msha-controller-operator-history
- **operator_operates_mine:** Beechwood Coal, LLC → Carlos Surface; 2016-11-28 to 2021-07-13; source msha-controller-operator-history
- **controller_controls_operator:** Jody L  Ritchie → Beechwood Coal, LLC; 2016-11-28 to 2021-07-13; source msha-controller-operator-history
- **operator_operates_mine:** Heritage Coal & Natural Resources, LLC → Carlos Surface; 2021-07-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Angela  Svonavec → Heritage Coal & Natural Resources, LLC; 2021-07-14 to 2024-02-04; source msha-controller-operator-history
- **controller_controls_mine:** Faith  Ritchie et al → Carlos Surface; 2022-03-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Faith  Ritchie et al → Beechwood Coal, LLC; 2022-03-16 to 2021-07-13; source msha-controller-operator-history
- **controller_controls_operator:** Jody L Ritchie et al → Beechwood Coal, LLC; 2022-03-16 to 2021-07-13; source msha-controller-operator-history
- **controller_controls_mine:** KTRV LLC → Carlos Surface; 2024-02-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** KTRV LLC → Heritage Coal & Natural Resources, LLC; 2024-02-05 to 2016-11-27; source msha-controller-operator-history
- **controller_controls_operator:** KTRV LLC → Heritage Coal & Natural Resources, LLC; 2024-02-05 to current/open; source msha-controller-operator-history