# Relationship history for MSHA mine 3609850

Current hierarchy: **Larry G  Kebert → Meadville Redi-Mix Concrete → Fintec 540 Screening Plant**

- 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:** Larry G  Kebert → Fintec 540 Screening Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Meadville Redi-Mix Concrete → Fintec 540 Screening Plant; 2010-05-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Larry G  Kebert → Meadville Redi-Mix Concrete; 2010-05-10 to current/open; source msha-controller-operator-history