# Relationship history for MSHA mine 2003364

Current hierarchy: **Billy W  Smith; Wesley H  Smith → Aggregate & Developing LLC → AC #2 Portable Crushing Plant**

- 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:** Wesley H  Smith  et al → AC #2 Portable Crushing Plant; 2006-03-03 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Aggregate & Developing LLC → AC #2 Portable Crushing Plant; 2007-01-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Wesley H  Smith  et al → Aggregate & Developing LLC; 2007-01-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Billy W  Smith  et al → Aggregate & Developing LLC; 2007-01-17 to current/open; source msha-controller-operator-history