# Relationship history for MSHA mine 4105491

Current hierarchy: **Ronald W  Klatt → Texas Aggregates, LLC → Ellinger Plant #4**

- 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:** Ronald W  Klatt Et Al → Ellinger Plant #4; 2002-09-13 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Texas Aggregates, LLC → Ellinger Plant #4; 2020-04-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ronald W  Klatt Et Al → Texas Aggregates, LLC; 2020-04-15 to current/open; source msha-controller-operator-history