# Relationship history for MSHA mine 2103664

Current hierarchy: **Marlys K  Bossen; Paul W  Bossen → Aggregate Washing Systems LLC → Aggregate Washing and Classification Sys**

- 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:** Aggregate Washing Systems LLC → Aggregate Washing and Classification Sys; 2009-05-11 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Marlys K  Bossen  et al → Aggregate Washing and Classification Sys; 2009-05-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Marlys K  Bossen  et al → Aggregate Washing Systems LLC; 2009-05-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Paul W  Bossen  et al → Aggregate Washing Systems LLC; 2009-05-11 to current/open; source msha-controller-operator-history