# Relationship history for MSHA mine 2301935

Current hierarchy: **Hunt Midwest Enterprises → Hunt Midwest Mining Inc → MO PORTABLE #3**

- 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:** Robert  Trager → MO PORTABLE #3; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Hunt Midwest Enterprises → MO PORTABLE #3; 1985-06-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Farmers Stone-Trager Quarries Company → MO PORTABLE #3; 1985-07-01 to 1992-03-02; source msha-controller-operator-history
- **controller_controls_operator:** Robert  Trager → Farmers Stone-Trager Quarries Company; 1985-07-01 to 1992-03-02; source msha-controller-operator-history
- **operator_operates_mine:** Trager Stone - Trager Quarries Company → MO PORTABLE #3; 1992-03-03 to 1998-07-22; source msha-controller-operator-history
- **controller_controls_mine:** Matthew  Trager → MO PORTABLE #3; 1992-03-03 to 1998-07-22; source msha-controller-operator-history
- **controller_controls_operator:** Matthew  Trager → Trager Stone - Trager Quarries Company; 1992-03-03 to 1998-07-22; source msha-controller-operator-history
- **operator_operates_mine:** Hunt Midwest Mining Inc → MO PORTABLE #3; 1998-07-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hunt Midwest Enterprises → Hunt Midwest Mining Inc; 1998-07-23 to current/open; source msha-controller-operator-history