# Relationship history for MSHA mine 2402032

Current hierarchy: **Blaine County-MT → Blaine County → BLAINE COUNTY SCREEN**

- 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:** Blaine County → BLAINE COUNTY SCREEN; 1993-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Blaine County-MT → BLAINE COUNTY SCREEN; 1993-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Blaine County-MT → Blaine County; 1993-04-01 to current/open; source msha-controller-operator-history