# Relationship history for MSHA mine 4703438

Current hierarchy: **Rick  Hanke → Hanke Terminals → Portable Crusher #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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Rick  Hanke → Portable Crusher #2; 2005-07-19 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Hanke Terminals → Portable Crusher #2; 2005-10-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rick  Hanke → Hanke Terminals; 2005-10-05 to current/open; source msha-controller-operator-history