# Relationship history for MSHA mine 4702863

Current hierarchy: **Rx Real Estate → Dann & Wendt Inc → Dann & Wendt Inc-Portable Unit #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:** ARLIE J  KLIPSTEIN → Dann & Wendt Inc-Portable Unit #2; 1950-01-01 to 2006-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Dann & Wendt Inc → Dann & Wendt Inc-Portable Unit #2; 1987-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** ARLIE J  KLIPSTEIN → Dann & Wendt Inc; 1987-07-01 to 2006-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Rx Real Estate → Dann & Wendt Inc-Portable Unit #2; 2007-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rx Real Estate → Dann & Wendt Inc; 2007-01-01 to current/open; source msha-controller-operator-history