# Relationship history for MSHA mine 4500006

Current hierarchy: **Raraavis Corp & Valley Concrete Co → Renton Concrete Recyclers → Renton Concrete Recyclers**

- 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

- **operator_operates_mine:** Black River Quarry Inc → Renton Concrete Recyclers; 1950-01-01 to 1988-09-20; source msha-controller-operator-history
- **controller_controls_mine:** James L  Hawk → Renton Concrete Recyclers; 1950-01-01 to 1988-09-20; source msha-controller-operator-history
- **controller_controls_operator:** James L  Hawk → Black River Quarry Inc; 1950-01-01 to 1988-09-20; source msha-controller-operator-history
- **operator_operates_mine:** Renton Concrete Recyclers → Renton Concrete Recyclers; 1988-09-21 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Raraavis Corp & Valley Concrete Co → Renton Concrete Recyclers; 1988-09-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Raraavis Corp & Valley Concrete Co → Renton Concrete Recyclers; 1988-09-21 to current/open; source msha-controller-operator-history