# Relationship history for MSHA mine 4300667

Current hierarchy: **Greg D  Tatro → G W TATRO CONSTRUCTION INC → RENTAL CRUSHER/SCREENER/CONVEYOR**

- 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

- **controller_controls_mine:** Greg D  Tatro → RENTAL CRUSHER/SCREENER/CONVEYOR; 1989-05-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** G W Tatro Construction Inc → RENTAL CRUSHER/SCREENER/CONVEYOR; 2007-06-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Greg D  Tatro → G W Tatro Construction Inc; 2007-06-12 to current/open; source msha-controller-operator-history