# Relationship history for MSHA mine 2103804

Current hierarchy: **Kilen  Boe → Minn-Dak Asphalt, Inc → Wash Plant #1**

- 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

- **controller_controls_mine:** Kilen  Boe → Wash Plant #1; 2010-07-21 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Minn-Dak Asphalt, Inc → Wash Plant #1; 2013-06-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kilen  Boe → Minn-Dak Asphalt, Inc; 2013-06-10 to current/open; source msha-controller-operator-history