# Relationship history for MSHA mine 1401667

Current hierarchy: **Ben G  Kates → Kaw Valley Sand and Gravel, Inc. → Kaw Valley Dry Plant #2**

- 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

- **controller_controls_mine:** Ben G  Kates → Kaw Valley Dry Plant #2; 1984-07-11 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Kaw Valley Sand and Gravel, Inc. → Kaw Valley Dry Plant #2; 2006-07-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ben G  Kates → Kaw Valley Sand and Gravel, Inc.; 2006-07-07 to current/open; source msha-controller-operator-history