# Relationship history for MSHA mine 1518522

Current hierarchy: **American Resources Corporation → KNOTT COUNTY COAL LLC → Classic**

- 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:** Horizon Natural Resources Incorporated → Classic; 1998-09-02 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Knott County Mining Company → Classic; 2002-02-19 to 2004-10-03; source msha-controller-operator-history
- **controller_controls_operator:** Horizon Natural Resources Incorporated → Knott County Mining Company; 2002-02-19 to 2004-10-03; source msha-controller-operator-history
- **controller_controls_mine:** International Coal Group Inc (ICG) → Classic; 2004-10-01 to 2011-06-14; source msha-controller-operator-history
- **operator_operates_mine:** KNOTT COUNTY COAL LLC → Classic; 2004-10-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** International Coal Group Inc (ICG) → KNOTT COUNTY COAL LLC; 2004-10-04 to 2011-06-14; source msha-controller-operator-history
- **controller_controls_mine:** Arch Resources Inc → Classic; 2011-06-15 to 2016-04-11; source msha-controller-operator-history
- **controller_controls_operator:** Arch Resources Inc → KNOTT COUNTY COAL LLC; 2011-06-15 to 2016-04-11; source msha-controller-operator-history
- **controller_controls_mine:** Quest Energy Corporation → Classic; 2016-04-12 to 2017-01-04; source msha-controller-operator-history
- **controller_controls_operator:** Quest Energy Corporation → KNOTT COUNTY COAL LLC; 2016-04-12 to 2017-01-04; source msha-controller-operator-history
- **controller_controls_mine:** American Resources Corporation → Classic; 2017-01-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** American Resources Corporation → KNOTT COUNTY COAL LLC; 2017-01-05 to current/open; source msha-controller-operator-history