# Relationship history for MSHA mine 4608954

Current hierarchy: **Douglas M  Epling → Mountain Edge Mining, Inc. → Triple B Auger**

- 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:** Douglas M  Epling → Triple B Auger; 1994-12-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Mountain Edge Mining, Inc. → Triple B Auger; 2002-02-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Douglas M  Epling → Mountain Edge Mining, Inc.; 2002-02-15 to current/open; source msha-controller-operator-history