# Relationship history for MSHA mine 0800984

Current hierarchy: **Stewart Frank → Frank Stewart Trucking Inc → TOZOUR ROAD 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:** Stewart Ben → TOZOUR ROAD PIT; 1980-11-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Ben Stewart Trucking → TOZOUR ROAD PIT; 1981-08-01 to 1991-07-24; source msha-controller-operator-history
- **controller_controls_operator:** Stewart Ben → Ben Stewart Trucking; 1981-08-01 to 1991-07-24; source msha-controller-operator-history
- **operator_operates_mine:** Frank Stewart Trucking Inc → TOZOUR ROAD PIT; 1991-07-25 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Stewart Frank → TOZOUR ROAD PIT; 1991-07-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Stewart Frank → Frank Stewart Trucking Inc; 1991-07-25 to current/open; source msha-controller-operator-history