# Relationship history for MSHA mine 0301851

Current hierarchy: **E L  Smith → E L Smith → E. L. SMITH**

- 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:** E L  Smith → E. L. SMITH; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** E L Smith → E. L. SMITH; 2001-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** E L  Smith → E L Smith; 2001-05-01 to current/open; source msha-controller-operator-history