# Relationship history for MSHA mine 0404471

Current hierarchy: **Johnson Steve → V & J Rock Transport Inc → V & J**

- 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

- **operator_operates_mine:** V & J Rock Transport Inc → V & J; 1980-10-01 to 1989-06-15; source msha-controller-operator-history
- **controller_controls_mine:** Johnson Vance → V & J; 1980-10-01 to 1989-06-15; source msha-controller-operator-history
- **controller_controls_operator:** Johnson Vance → V & J Rock Transport Inc; 1980-10-01 to 1989-06-15; source msha-controller-operator-history
- **operator_operates_mine:** V & J Rock Transport Inc → V & J; 1989-06-16 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Johnson Steve → V & J; 1989-06-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Johnson Steve → V & J Rock Transport Inc; 1989-06-16 to current/open; source msha-controller-operator-history