# Relationship history for MSHA mine 0200845

Current hierarchy: **Terra Industries Inc → Inspiration Consolidated Copper Company → Inspiration Concentrator**

- 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:** Inspiration Consolidated Copper Company → Inspiration Concentrator; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Terra Industries Inc → Inspiration Concentrator; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Terra Industries Inc → Inspiration Consolidated Copper Company; 1950-01-01 to current/open; source msha-controller-operator-history