# Relationship history for MSHA mine 1518977

Current hierarchy: **Appalachian Resource Company LLC → ARC Kentucky Resources, LLC → Rob Fork Contour**

- 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:** Wexford Capital LLC → Rob Fork Contour; 2003-05-12 to 2010-10-04; source msha-controller-operator-history
- **controller_controls_mine:** Edsel H  Preece et al → Rob Fork Contour; 2005-01-31 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Twin Energy L. L. C. → Rob Fork Contour; 2006-03-17 to 2007-06-24; source msha-controller-operator-history
- **controller_controls_operator:** Edsel H  Preece et al → Twin Energy L. L. C.; 2006-03-17 to 2007-06-24; source msha-controller-operator-history
- **operator_operates_mine:** CAM Mining LLC → Rob Fork Contour; 2007-06-25 to 2020-08-31; source msha-controller-operator-history
- **controller_controls_operator:** Wexford Capital LLC → CAM Mining LLC; 2007-06-25 to 2010-10-04; source msha-controller-operator-history
- **controller_controls_mine:** Rhino Resource Partners LP → Rob Fork Contour; 2010-10-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rhino Resource Partners LP → CAM Mining LLC; 2010-10-05 to 2020-08-31; source msha-controller-operator-history
- **operator_operates_mine:** ARC Kentucky Resources, LLC → Rob Fork Contour; 2020-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Appalachian Resource Company LLC → Rob Fork Contour; 2020-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Appalachian Resource Company LLC → ARC Kentucky Resources, LLC; 2020-09-01 to current/open; source msha-controller-operator-history