# Relationship history for MSHA mine 1510561

Current hierarchy: **Hamilton Samuel → Little Eagle Coal Company Inc → No 4 Surface 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Little Eagle Coal Company Inc → No 4 Surface Auger; 1977-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Hamilton Samuel → No 4 Surface Auger; 1977-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hamilton Samuel → Little Eagle Coal Company Inc; 1977-07-01 to current/open; source msha-controller-operator-history