# Relationship history for MSHA mine 4606956

Current hierarchy: **Douglas M  Epling → Mountain Edge Mining Inc → Cheylan Dock**

- 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:** Eastern Gas & Fuel Association → Cheylan Dock; 1984-10-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Nu East Mining Corp → Cheylan Dock; 1985-06-01 to 1987-05-14; source msha-controller-operator-history
- **controller_controls_operator:** Eastern Gas & Fuel Association → Nu East Mining Corp; 1985-06-01 to 1987-05-14; source msha-controller-operator-history
- **operator_operates_mine:** Mountain View Coal Company → Cheylan Dock; 1987-05-15 to 1996-08-14; source msha-controller-operator-history
- **controller_controls_mine:** Hanson PLC → Cheylan Dock; 1987-05-15 to 1996-08-14; source msha-controller-operator-history
- **controller_controls_operator:** Hanson PLC → Mountain View Coal Company; 1987-05-15 to 1996-08-14; source msha-controller-operator-history
- **controller_controls_mine:** Douglas M  Epling → Cheylan Dock; 1994-12-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Little Creek Dock Company Inc → Cheylan Dock; 1996-08-15 to 1999-06-20; source msha-controller-operator-history
- **controller_controls_mine:** Greg  Stover → Cheylan Dock; 1996-08-15 to 1999-06-20; source msha-controller-operator-history
- **controller_controls_operator:** Greg  Stover → Little Creek Dock Company Inc; 1996-08-15 to 1999-06-20; source msha-controller-operator-history
- **operator_operates_mine:** Little Creek Dock Company Inc → Cheylan Dock; 1999-06-21 to 1999-08-14; source msha-controller-operator-history
- **controller_controls_mine:** Richard  Busick → Cheylan Dock; 1999-06-21 to 1999-08-14; source msha-controller-operator-history
- **controller_controls_operator:** Richard  Busick → Little Creek Dock Company Inc; 1999-06-21 to 1999-08-14; source msha-controller-operator-history
- **operator_operates_mine:** Mountain Edge Mining Inc → Cheylan Dock; 1999-08-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Douglas M  Epling → Mountain Edge Mining Inc; 1999-08-15 to current/open; source msha-controller-operator-history