# Relationship history for MSHA mine 0801449

Current hierarchy: **Carl C West → West to West Construction, LLC → Portable 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** West to West Construction, llc → Portable Crusher; 2022-12-19 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Carl C West → Portable Crusher; 2022-12-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Carl C West → West to West Construction, llc; 2022-12-19 to current/open; source msha-controller-operator-history