# Relationship history for MSHA mine 3401496

Current hierarchy: **Followwill Mike → John'S Trucking Inc → J & J Sand**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Followwill Mike → J & J Sand; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** John'S Trucking Inc → J & J Sand; 1985-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Followwill Mike → John'S Trucking Inc; 1985-06-01 to current/open; source msha-controller-operator-history