# Relationship history for MSHA mine 1401268

Current hierarchy: **John  Hilty → Venture Quarries Inc → Venture Quarry #5**

- 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:** John  Hilty  et al → Venture Quarry #5; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Venture Quarries Inc → Venture Quarry #5; 1978-03-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John  Hilty  et al → Venture Quarries Inc; 1978-03-09 to current/open; source msha-controller-operator-history