# Relationship history for MSHA mine 1517955

Current hierarchy: **El Paso Energy Corp → Coastal Coal Company, LLC → Black Thunder Mine No. 2**

- 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:** El Paso Energy Corp → Black Thunder Mine No. 2; 1989-04-04 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Charles E  Yates → Black Thunder Mine No. 2; 1989-07-10 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Adena Fuels Inc → Black Thunder Mine No. 2; 1997-07-01 to 1998-12-10; source msha-controller-operator-history
- **controller_controls_operator:** Charles E  Yates → Adena Fuels Inc; 1997-07-01 to 1998-12-10; source msha-controller-operator-history
- **operator_operates_mine:** Coastal Coal Company, LLC → Black Thunder Mine No. 2; 1998-12-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** El Paso Energy Corp → Coastal Coal Company, LLC; 1998-12-11 to current/open; source msha-controller-operator-history