# Relationship history for MSHA mine 4703379

Current hierarchy: **Bradley D  Huston; Wade R  Huston → R G Huston Company Inc → 99-04 Masaba Portable 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: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **controller_controls_mine:** Dale R  Huston → 99-04 Masaba Portable Wash Plant; 1999-07-01 to 2022-01-02; source msha-controller-operator-history
- **operator_operates_mine:** R G Huston Company Inc → 99-04 Masaba Portable Wash Plant; 2004-04-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dale R  Huston → R G Huston Company Inc; 2004-04-02 to 2022-01-02; source msha-controller-operator-history
- **controller_controls_mine:** Bradley D  Huston et al → 99-04 Masaba Portable Wash Plant; 2022-01-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bradley D  Huston et al → R G Huston Company Inc; 2022-01-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Wade R  Huston et al → R G Huston Company Inc; 2022-01-03 to current/open; source msha-controller-operator-history