# Relationship history for MSHA mine 1701099

Current hierarchy: **Mark Dayton  Brown → Brex Corporation → Brex Mobile 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:** Brex Corporation → Brex Mobile Plant; 2023-08-17 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Mark Dayton  Brown → Brex Mobile Plant; 2023-08-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mark Dayton  Brown → Brex Corporation; 2023-08-17 to current/open; source msha-controller-operator-history