# Relationship history for MSHA mine 2602093

Current hierarchy: **Fred R  Salisbury → Gold Wheel Construction, Inc. → Hoggum Mine**

- 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:** Gold Wheel Enterprises Inc → Hoggum Mine; 1989-01-01 to 2017-05-15; source msha-controller-operator-history
- **controller_controls_mine:** Fred R  Salisbury → Hoggum Mine; 1989-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Fred R  Salisbury → Gold Wheel Enterprises Inc; 1989-01-01 to 2017-05-15; source msha-controller-operator-history
- **controller_controls_mine:** Fred R  Salisbury → Hoggum Mine; 2003-07-31 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Gold Wheel Construction, Inc. → Hoggum Mine; 2017-05-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Fred R  Salisbury → Gold Wheel Construction, Inc.; 2017-05-16 to current/open; source msha-controller-operator-history