# Relationship history for MSHA mine 4606947

Current hierarchy: **El Paso Energy Corp → Coastal Coal-West Virginia Llc → Gp Blue Knob Surface**

- 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:** Paul K  Moran → Gp Blue Knob Surface; 1979-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** El Paso Energy Corp → Gp Blue Knob Surface; 1979-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Anderson James Et Al → Gp Blue Knob Surface; 1983-10-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Kent Coal Company → Gp Blue Knob Surface; 1985-06-01 to 1987-09-20; source msha-controller-operator-history
- **controller_controls_operator:** Paul K  Moran → Kent Coal Company; 1985-06-01 to 1987-09-20; source msha-controller-operator-history
- **operator_operates_mine:** Drennen Enterprises Inc → Gp Blue Knob Surface; 1987-09-21 to 1989-02-05; source msha-controller-operator-history
- **controller_controls_operator:** Anderson James Et Al → Drennen Enterprises Inc; 1987-09-21 to 1989-02-05; source msha-controller-operator-history
- **operator_operates_mine:** Kent Coal Company → Gp Blue Knob Surface; 1989-02-06 to 1997-02-05; source msha-controller-operator-history
- **controller_controls_operator:** Paul K  Moran → Kent Coal Company; 1989-02-06 to 1997-02-05; source msha-controller-operator-history
- **operator_operates_mine:** Coastal Coal-West Virginia Llc → Gp Blue Knob Surface; 1997-02-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** El Paso Energy Corp → Coastal Coal-West Virginia Llc; 1997-02-06 to current/open; source msha-controller-operator-history