# Relationship history for MSHA mine 3609153

Current hierarchy: **Stanley R  Goodwin → Goodwin's & Sons Gravel Pit → Goodwin's & Sons 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:** Goodwin's & Sons Gravel Pit → Goodwin's & Sons Gravel Pit; 2003-05-29 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Stanley R  Goodwin  et al → Goodwin's & Sons Gravel Pit; 2003-05-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Stanley R  Goodwin  et al → Goodwin's & Sons Gravel Pit; 2003-05-29 to current/open; source msha-controller-operator-history