# Relationship history for MSHA mine 2700397

Current hierarchy: **Malcolm R  Bradsher → M. BRADSHER CO., INC. → ARGO**

- 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:** M. BRADSHER CO., INC. → ARGO; 2005-02-17 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Malcolm R  Bradsher → ARGO; 2005-02-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Malcolm R  Bradsher → M. BRADSHER CO., INC.; 2005-02-17 to current/open; source msha-controller-operator-history