# Relationship history for MSHA mine 1518787

Current hierarchy: **Bill C  Smith → Patrick Processing LLC → No. 2**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Bill C  Smith → No. 2; 2002-12-19 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Patrick Processing LLC → No. 2; 2004-08-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bill C  Smith → Patrick Processing LLC; 2004-08-09 to current/open; source msha-controller-operator-history