# Relationship history for MSHA mine 4703769

Current hierarchy: **Stuart T  Hanson → Roger Hanson Sanitation & Excavating, Inc. → Wash Plant**

- 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:** Stuart T  Hanson → Wash Plant; 1991-07-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** ROGER HANSON SANITATION & EXCAVATING INC → Wash Plant; 2015-09-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Stuart T  Hanson → ROGER HANSON SANITATION & EXCAVATING INC; 2015-09-09 to current/open; source msha-controller-operator-history