# Relationship history for MSHA mine 1103168

Current hierarchy: **Michael P  Vondra → Reliable Materials Lyons LLC → Lyons**

- 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:** Reliable Materials Lyons LLC → Lyons; 2006-08-18 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Michael P  Vondra → Lyons; 2006-08-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Michael P  Vondra → Reliable Materials Lyons LLC; 2006-08-18 to current/open; source msha-controller-operator-history