# Relationship history for MSHA mine 4406795

Current hierarchy: **El Paso Energy Corp → Coastal Coal Company Llc → Sargent Hollow**

- 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 → Sargent Hollow; 1989-04-04 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Sargent Hollow Mining Corp → Sargent Hollow; 1995-05-01 to 1997-01-27; source msha-controller-operator-history
- **controller_controls_mine:** Cumberland Resources Corporation → Sargent Hollow; 1995-05-01 to 1997-01-27; source msha-controller-operator-history
- **controller_controls_operator:** Cumberland Resources Corporation → Sargent Hollow Mining Corp; 1995-05-01 to 1997-01-27; source msha-controller-operator-history
- **operator_operates_mine:** Coastal Coal Company Llc → Sargent Hollow; 1997-01-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** El Paso Energy Corp → Coastal Coal Company Llc; 1997-01-28 to current/open; source msha-controller-operator-history