# Relationship history for MSHA mine 3901498

Current hierarchy: **Rick  Beilke → Beilke Construction, Inc. → Beilke Conveyor**

- 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:** Rick  Beilke et al → Beilke Conveyor; 1982-08-24 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Beilke Construction, Inc. → Beilke Conveyor; 2004-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rick  Beilke et al → Beilke Construction, Inc.; 2004-09-01 to current/open; source msha-controller-operator-history