# Relationship history for MSHA mine 1518055

Current hierarchy: **George D  Bentley → C & K Augering Inc → #1**

- 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:** River Run Auger Inc → #1; 1998-06-01 to 1999-08-01; source msha-controller-operator-history
- **controller_controls_mine:** Randy  Bentley → #1; 1998-06-01 to 1999-08-01; source msha-controller-operator-history
- **controller_controls_operator:** Randy  Bentley → River Run Auger Inc; 1998-06-01 to 1999-08-01; source msha-controller-operator-history
- **operator_operates_mine:** C & K Augering Inc → #1; 1999-08-02 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** George D  Bentley → #1; 1999-08-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** George D  Bentley → C & K Augering Inc; 1999-08-02 to current/open; source msha-controller-operator-history