# Relationship history for MSHA mine 3901355

Current hierarchy: **Vernon E  Stratton → North American Accounts → Smith Bin**

- 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:** Vernon E  Stratton → Smith Bin; 1979-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** North American Accounts → Smith Bin; 1987-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Vernon E  Stratton → North American Accounts; 1987-01-01 to current/open; source msha-controller-operator-history