# Relationship history for MSHA mine 1511787

Current hierarchy: **American Resources Corporation → Knott County Coal LLC → Kragon Tipple**

- 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

- **operator_operates_mine:** Kentucky May Coal Corp → Kragon Tipple; 1979-03-01 to 1993-03-21; source msha-controller-operator-history
- **controller_controls_mine:** Buchart Michael P → Kragon Tipple; 1979-03-01 to 1993-03-21; source msha-controller-operator-history
- **controller_controls_operator:** Buchart Michael P → Kentucky May Coal Corp; 1979-03-01 to 1993-03-21; source msha-controller-operator-history
- **controller_controls_mine:** Florida Progress Corporation → Kragon Tipple; 1989-10-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Kentucky May Coal Company Inc → Kragon Tipple; 1993-03-22 to 2016-04-11; source msha-controller-operator-history
- **controller_controls_operator:** Florida Progress Corporation → Kentucky May Coal Company Inc; 1993-03-22 to 2016-04-11; source msha-controller-operator-history
- **controller_controls_mine:** International Coal Group Inc (ICG) → Kragon Tipple; 2004-10-01 to 2011-06-14; source msha-controller-operator-history
- **controller_controls_mine:** Arch Resources Inc → Kragon Tipple; 2011-06-15 to 2016-04-11; source msha-controller-operator-history
- **operator_operates_mine:** Knott County Coal LLC → Kragon Tipple; 2016-04-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** International Coal Group Inc (ICG) → Knott County Coal LLC; 2016-04-12 to 2011-06-14; source msha-controller-operator-history
- **controller_controls_mine:** Quest Energy Corporation → Kragon Tipple; 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_operator:** Arch Resources Inc → Knott County Coal LLC; 2016-04-12 to 2016-04-11; source msha-controller-operator-history
- **controller_controls_mine:** American Resources Corporation → Kragon Tipple; 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