# Relationship history for MSHA mine 4608013

Current hierarchy: **El Paso Energy Corp → Coastal Coal-West Virginia Llc → Sams Branch 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:** El Paso Energy Corp → Sams Branch Surface; 1979-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** John E  Plaster → Sams Branch Surface; 1988-04-26 to 1993-09-12; source msha-controller-operator-history
- **operator_operates_mine:** Diamond Black Mining Inc → Sams Branch Surface; 1991-03-01 to 1993-09-12; source msha-controller-operator-history
- **controller_controls_operator:** John E  Plaster → Diamond Black Mining Inc; 1991-03-01 to 1993-09-12; source msha-controller-operator-history
- **controller_controls_mine:** El Paso Energy Corp → Sams Branch Surface; 1993-05-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Greenbrier Coal Company → Sams Branch Surface; 1993-09-13 to 1993-12-17; source msha-controller-operator-history
- **controller_controls_operator:** El Paso Energy Corp → Greenbrier Coal Company; 1993-09-13 to 1993-12-17; source msha-controller-operator-history
- **controller_controls_mine:** Gary Wayne  Johnson → Sams Branch Surface; 1993-11-03 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Coal Rush Mining Inc → Sams Branch Surface; 1993-12-18 to 1997-02-05; source msha-controller-operator-history
- **controller_controls_operator:** Gary Wayne  Johnson → Coal Rush Mining Inc; 1993-12-18 to 1997-02-05; source msha-controller-operator-history
- **operator_operates_mine:** Coastal Coal-West Virginia Llc → Sams Branch 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