# Relationship history for MSHA mine 3401429

Current hierarchy: **Roca Radiadores S A → International American Ceramics Inc → RED WAGON**

- 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:** Block Sand & Gravel Company → RED WAGON; 1984-01-01 to 1999-08-29; source msha-controller-operator-history
- **controller_controls_mine:** Block Daniel → RED WAGON; 1984-01-01 to 1999-08-29; source msha-controller-operator-history
- **controller_controls_operator:** Block Daniel → Block Sand & Gravel Company; 1984-01-01 to 1999-08-29; source msha-controller-operator-history
- **operator_operates_mine:** International American Ceramics Inc → RED WAGON; 1999-08-30 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Roca Radiadores S A → RED WAGON; 1999-08-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Roca Radiadores S A → International American Ceramics Inc; 1999-08-30 to current/open; source msha-controller-operator-history