# Relationship history for MSHA mine 4608182

Current hierarchy: **El Paso Energy Corp → Coastal Coal-West Virginia Llc → 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:** James G  Bryant → Blue Knob Surface; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** El Paso Energy Corp → Blue Knob Surface; 1979-10-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Bryant Mining Company Inc → Blue Knob Surface; 1992-06-01 to 1997-02-05; source msha-controller-operator-history
- **controller_controls_operator:** James G  Bryant → Bryant Mining Company Inc; 1992-06-01 to 1997-02-05; source msha-controller-operator-history
- **operator_operates_mine:** Coastal Coal-West Virginia Llc → 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