# Relationship history for MSHA mine 0301834

Current hierarchy: **David  Lebow → D M L Mining Company → NEAL SMITH MINE**

- 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:** D M L Mining Company → NEAL SMITH MINE; 2000-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** David  Lebow → NEAL SMITH MINE; 2000-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David  Lebow → D M L Mining Company; 2000-10-01 to current/open; source msha-controller-operator-history