# Relationship history for MSHA mine 1601096

Current hierarchy: **Core Gary → W R Core Inc → W R Core Incorporated Hot Mix Plant**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **operator_operates_mine:** W R Core Inc → W R Core Incorporated Hot Mix Plant; 1986-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Core Gary → W R Core Incorporated Hot Mix Plant; 1986-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Core Gary → W R Core Inc; 1986-07-01 to current/open; source msha-controller-operator-history