# Relationship history for MSHA mine 5001940

Current hierarchy: **Donald D  Brown → Brown Construction Co, Inc. → Brown Construction Co Inc**

- 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:** Brown Construction Co, Inc. → Brown Construction Co Inc; 2010-06-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Donald D  Brown → Brown Construction Co Inc; 2010-06-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Donald D  Brown → Brown Construction Co, Inc.; 2010-06-15 to current/open; source msha-controller-operator-history