# Relationship history for MSHA mine 4703409

Current hierarchy: **Bradley D  Huston; Wade R  Huston → R G Huston Company, Inc. → 59-02 Chieftan Powerscreen**

- 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:** Dale R  Huston → 59-02 Chieftan Powerscreen; 1999-07-01 to 2022-01-02; source msha-controller-operator-history
- **operator_operates_mine:** R G Huston Company, Inc. → 59-02 Chieftan Powerscreen; 2004-12-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dale R  Huston → R G Huston Company, Inc.; 2004-12-14 to 2022-01-02; source msha-controller-operator-history
- **controller_controls_mine:** Bradley D  Huston et al → 59-02 Chieftan Powerscreen; 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