# Relationship history for MSHA mine 2001830

Current hierarchy: **Eric W  Brow; Jaimee S  Brow → Brow Crushing, Inc. → Brow Crushing, 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:** Gene Brow Construction Company → Brow Crushing, Inc.; 1950-01-01 to 1998-08-12; source msha-controller-operator-history
- **controller_controls_mine:** June  Brow → Brow Crushing, Inc.; 1950-01-01 to 1998-08-12; source msha-controller-operator-history
- **controller_controls_operator:** June  Brow → Gene Brow Construction Company; 1950-01-01 to 1998-08-12; source msha-controller-operator-history
- **controller_controls_mine:** Dean  Brow → Brow Crushing, Inc.; 1997-08-19 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Gene Brow & Sons, Inc. → Brow Crushing, Inc.; 1998-08-13 to 2016-03-10; source msha-controller-operator-history
- **controller_controls_operator:** Dean  Brow → Gene Brow & Sons, Inc.; 1998-08-13 to 2016-03-10; source msha-controller-operator-history
- **operator_operates_mine:** Brow Crushing Inc. → Brow Crushing, Inc.; 2016-03-11 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Eric W  Brow et al → Brow Crushing, Inc.; 2016-03-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Eric W  Brow et al → Brow Crushing Inc.; 2016-03-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jaimee S  Brow et al → Brow Crushing Inc.; 2016-03-11 to current/open; source msha-controller-operator-history