# Relationship history for MSHA mine 4201482

Current hierarchy: **Larry W  Corn → Corn Construction Company → Lems Draw 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Larry W  Corn → Lems Draw Pit; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** San Juan County Roads → Lems Draw Pit; 1978-03-09 to 1984-10-31; source msha-controller-operator-history
- **controller_controls_mine:** San Juan County-Ut → Lems Draw Pit; 1978-03-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** San Juan County-Ut → San Juan County Roads; 1978-03-09 to 1984-10-31; source msha-controller-operator-history
- **operator_operates_mine:** Corn Construction Company → Lems Draw Pit; 1984-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Larry W  Corn → Corn Construction Company; 1984-11-01 to current/open; source msha-controller-operator-history