# Relationship history for MSHA mine 2402715

Current hierarchy: **Albert A  Schellinger → Schellinger Construction Co, Inc. → Wash Plant #3**

- 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:** Albert A  Schellinger → Wash Plant #3; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Schellinger Construction Co, Inc. → Wash Plant #3; 2017-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Albert A  Schellinger → Schellinger Construction Co, Inc.; 2017-06-01 to current/open; source msha-controller-operator-history