# Relationship history for MSHA mine 3001901

Current hierarchy: **Jim  Van Eenwyk → Grandpas Nursery Gardens Inc → Grandpas Gravel Pit**

- 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:** Town Of Williamson → Grandpas Gravel Pit; 1950-01-01 to 2013-10-31; source msha-controller-operator-history
- **controller_controls_mine:** Town Of Williamson → Grandpas Gravel Pit; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Town Of Williamson → Town Of Williamson; 1950-01-01 to 2013-10-31; source msha-controller-operator-history
- **operator_operates_mine:** Grandpas Nursery Gardens Inc → Grandpas Gravel Pit; 2013-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jim  Van Eenwyk → Grandpas Gravel Pit; 2013-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jim  Van Eenwyk → Grandpas Nursery Gardens Inc; 2013-11-01 to current/open; source msha-controller-operator-history