# Relationship history for MSHA mine 4609507

Current hierarchy: **Edward A  Asbury → Raw Coal Mining Company, Inc → EDM No. 1 Mine**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Edward A  Asbury → EDM No. 1 Mine; 1992-04-22 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Raw Coal Mining Company, Inc → EDM No. 1 Mine; 2016-01-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Edward A  Asbury → Raw Coal Mining Company, Inc; 2016-01-15 to current/open; source msha-controller-operator-history