# Relationship history for MSHA mine 3609956

Current hierarchy: **Robert E  Elkin → E.E. & S. AUGER  MINING INC → 3139**

- 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:** Robert E  Elkin → 3139; 2003-12-17 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** E.E. & S. AUGER  MINING INC → 3139; 2011-09-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert E  Elkin → E.E. & S. AUGER  MINING INC; 2011-09-15 to current/open; source msha-controller-operator-history