# Relationship history for MSHA mine 3609744

Current hierarchy: **Alpha Natural Resources, Inc. → Coral Energy Services LLC → Coral Energy**

- 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

- **operator_operates_mine:** Coral Energy Services LLC → Coral Energy; 2009-04-29 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Natural Resources, Inc. → Coral Energy; 2009-04-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources, Inc. → Coral Energy Services LLC; 2009-04-29 to current/open; source msha-controller-operator-history