# Relationship history for MSHA mine 2402100

Current hierarchy: **Cascade County-MT → Cascade County Road & Bridge → Metso HP 200 Cone Plant Gravel Crusher**

- 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:** Cascade County Road & Bridge → Metso HP 200 Cone Plant Gravel Crusher; 1996-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Cascade County-MT → Metso HP 200 Cone Plant Gravel Crusher; 1996-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cascade County-MT → Cascade County Road & Bridge; 1996-10-01 to current/open; source msha-controller-operator-history