# Relationship history for MSHA mine 2003075

Current hierarchy: **Andrew P  Smith → Smith Paving Inc → Kolberg Screener**

- 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:** Andrew P  Smith → Kolberg Screener; 1995-10-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Smith Paving Inc → Kolberg Screener; 1998-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Andrew P  Smith → Smith Paving Inc; 1998-08-01 to current/open; source msha-controller-operator-history