# Relationship history for MSHA mine 3503335

Current hierarchy: **Cass  Vanderwiele → Triple C Redi-Mix Inc → Triple C 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

- **operator_operates_mine:** Triple C Redi-Mix Inc → Triple C Pit; 1989-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Cass  Vanderwiele → Triple C Pit; 1989-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cass  Vanderwiele → Triple C Redi-Mix Inc; 1989-06-01 to current/open; source msha-controller-operator-history