# Relationship history for MSHA mine 3002483

Current hierarchy: **William E  Threw → Bill Threw Inc → YOLE 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: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **operator_operates_mine:** Parrish Trucking → YOLE PIT; 1980-01-01 to 1990-09-09; source msha-controller-operator-history
- **controller_controls_mine:** Frank  Parrish → YOLE PIT; 1980-01-01 to 1990-09-09; source msha-controller-operator-history
- **controller_controls_operator:** Frank  Parrish → Parrish Trucking; 1980-01-01 to 1990-09-09; source msha-controller-operator-history
- **operator_operates_mine:** Bill Threw Inc → YOLE PIT; 1990-09-10 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** William E  Threw → YOLE PIT; 1990-09-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** William E  Threw → Bill Threw Inc; 1990-09-10 to current/open; source msha-controller-operator-history