# Relationship history for MSHA mine 2002797

Current hierarchy: **Dean  Brow → Gene Brow & Sons, Inc. → Gene Brow & Sons, 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

- **controller_controls_mine:** June  Brow → Gene Brow & Sons, Inc.; 1950-01-01 to 1998-08-12; source msha-controller-operator-history
- **operator_operates_mine:** Gene Brow Construction Company → Gene Brow & Sons, Inc.; 1987-11-01 to 1997-08-18; source msha-controller-operator-history
- **controller_controls_operator:** June  Brow → Gene Brow Construction Company; 1987-11-01 to 1997-08-18; source msha-controller-operator-history
- **operator_operates_mine:** Gene Brow & Sons Inc → Gene Brow & Sons, Inc.; 1997-08-19 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Dean  Brow → Gene Brow & Sons, Inc.; 1997-08-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dean  Brow → Gene Brow & Sons Inc; 1997-08-19 to current/open; source msha-controller-operator-history