# Relationship history for MSHA mine 4702834

Current hierarchy: **William G  Hausz Jr; Donald C  Hausz → Hausz Brothers Inc → Jefferson Quarry**

- 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:** Donald C  Hausz et al → Jefferson Quarry; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Hausz Brothers Inc → Jefferson Quarry; 1986-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Donald C  Hausz et al → Hausz Brothers Inc; 1986-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** William G  Hausz Jr et al → Hausz Brothers Inc; 1986-08-01 to current/open; source msha-controller-operator-history