# Relationship history for MSHA mine 4201919

Current hierarchy: **Larry W  Corn → Corn Construction Company → Woodside 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

- **controller_controls_mine:** Larry W  Corn → Woodside Pit; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Corn Construction Company → Woodside Pit; 1985-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Larry W  Corn → Corn Construction Company; 1985-01-01 to current/open; source msha-controller-operator-history