# Relationship history for MSHA mine 1700982

Current hierarchy: **Lendell N Quint; Stephen L Quint → Try Berwick Sand & Gravel → Try Berwick Sand & Gravel**

- 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

- **operator_operates_mine:** Try Berwick Sand & Gravel → Try Berwick Sand & Gravel; 2016-04-18 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Stephen L Quint → Try Berwick Sand & Gravel; 2016-04-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Stephen L Quint → Try Berwick Sand & Gravel; 2016-04-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lendell N Quint → Try Berwick Sand & Gravel; 2016-04-18 to current/open; source msha-controller-operator-history