# Relationship history for MSHA mine 4101778

Current hierarchy: **Ronald W  Klatt → Texas Aggregates LP → Texas Aggregates - LaGrange 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** La Grange Concrete & Aggregates Inc → Texas Aggregates - LaGrange Plant; 1950-01-01 to 2015-05-31; source msha-controller-operator-history
- **controller_controls_mine:** Jimmie  Hahn Jr et al → Texas Aggregates - LaGrange Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jimmie  Hahn Jr et al → La Grange Concrete & Aggregates Inc; 1950-01-01 to 2015-05-31; source msha-controller-operator-history
- **controller_controls_mine:** Ronald W  Klatt Et Al → Texas Aggregates - LaGrange Plant; 2002-09-13 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Texas Aggregates LP → Texas Aggregates - LaGrange Plant; 2015-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ronald W  Klatt Et Al → Texas Aggregates LP; 2015-06-01 to current/open; source msha-controller-operator-history