# Relationship history for MSHA mine 1701170

Current hierarchy: **Matthew M Genest etal; Christopher R Genest etal; David B Genest etal → Genest Concrete Works Inc → Lippman Screener**

- 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:** Michael  Genest → Lippman Screener; 1950-01-01 to 2021-06-30; source msha-controller-operator-history
- **controller_controls_mine:** Christopher R Genest etal → Lippman Screener; 2021-07-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Genest Concrete Works Inc → Lippman Screener; 2026-03-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Christopher R Genest etal → Genest Concrete Works Inc; 2026-03-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David B Genest etal → Genest Concrete Works Inc; 2026-03-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Matthew M Genest etal → Genest Concrete Works Inc; 2026-03-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Michael  Genest → Genest Concrete Works Inc; 2026-03-31 to 2021-06-30; source msha-controller-operator-history