# Relationship history for MSHA mine 4703524

Current hierarchy: **Brett A  Frank → Aggregate Produced Products Inc → Greystone 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

- **operator_operates_mine:** Aggregate Produced Products Inc → Greystone Wash Plant; 2008-03-31 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Brett A  Frank → Greystone Wash Plant; 2008-03-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brett A  Frank → Aggregate Produced Products Inc; 2008-03-31 to current/open; source msha-controller-operator-history