# Relationship history for MSHA mine 0404950

Current hierarchy: **Teichert Inc → Western Aggregates LLC → Western Aggregates LLC**

- 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:** Eagle Materials Inc → Western Aggregates LLC; 1950-01-01 to 2020-04-16; source msha-controller-operator-history
- **operator_operates_mine:** Western Aggregates LLC → Western Aggregates LLC; 1988-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Eagle Materials Inc → Western Aggregates LLC; 1988-03-01 to 2020-04-16; source msha-controller-operator-history
- **controller_controls_mine:** Teichert Inc → Western Aggregates LLC; 2020-04-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Teichert Inc → Western Aggregates LLC; 2020-04-17 to current/open; source msha-controller-operator-history