# Relationship history for MSHA mine 2002970

Current hierarchy: **Ray  Oppenhuizen → Newaygo County Redi-Mix Inc → N.C. REDI-MIX INC.**

- 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:** Ray  Oppenhuizen  et al → N.C. REDI-MIX INC.; 1990-02-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Newaygo County Redi-Mix Inc → N.C. REDI-MIX INC.; 1995-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ray  Oppenhuizen  et al → Newaygo County Redi-Mix Inc; 1995-12-01 to current/open; source msha-controller-operator-history